Washing machine leaking
Finding a washing machine leak requires careful observation of where the water appears and exactly when in the cycle it occurs. Water tracks along surfaces before dripping, so the visible drip point is often not the source. Use newspaper, watch for soap residue marks, and always test with a normal load inside – some leaks only appear with laundry in the drum.
Never run a washing machine with the top or back panel removed while trying to observe a leak. Water on the floor near a running washing machine is an electrocution risk. If you need to look inside to source a leak, unplug the machine first. See our DIY repair safety guide before starting.
Most washing machine leaks come from a small number of common sources – but finding which one requires systematic observation rather than guesswork. The tips below help narrow down the source quickly and avoid misdiagnosis.
5 Tips for Finding a Washing Machine Leak
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Use newspaper to pinpoint where water is entering from
Slide newspaper sheets under the front of the machine before running it. Check the newspaper regularly during the cycle – before it becomes fully saturated – to see where the water first appears. The damp area indicates the side or area the leak is originating from. This works even before pulling the machine out and gives useful information for an engineer visit or for deciding where to focus the investigation.
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Note exactly when in the cycle the water appears
The timing of a leak is one of the most useful clues to its source. A leak only during filling suggests a fill hose, tap connection, or dispenser housing issue. A leak only during washing or rinses points to drum seals, internal hoses, or the dispenser. A leak only on spin almost always indicates a drain fault or something leaking under pressure. Record when it happens to give the most accurate picture.
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Look for evidence of past leaks – but interpret it carefully
Water leaves evidence: rust staining on metal surfaces, white soap residue trails where suds dried, and scale deposits on hose connections. These marks can help identify the leak source even when the leak is intermittent and not currently active. However, if a previous leak was repaired, old evidence may still be visible. Do not blame a component based solely on old staining if the actual leak has moved or been fixed.
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Always test with a normal load inside
Some leaks only occur with laundry in the drum. Running a diagnostic cycle empty and finding no leak does not mean the machine is fault-free. The weight, movement, and water absorption of laundry can affect water distribution, drum movement, and the forces on seals and hoses in ways that an empty cycle does not replicate. Always run a test wash with a typical load inside before concluding the fault has gone.
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Remember that water runs and tracks before dripping
The point where water is visibly dripping is often not where it is originating. Water runs along the bottom of hoses, along cable runs, and around the base of the outer drum before dripping. An apparent leak at the bottom of the door may actually be coming from the soap dispenser drawer. An apparent leak from a hose near the pump may be dripping off it from a leak higher up. Trace back from the drip point to find the true source. See our guide on washing machine leaking from the door for an example of this.
Preventing Leaks When the Machine Is Not in Use
Fill hoses and their connections remain under mains water pressure when the machine is not running. A slow drip from a hose connection that is imperceptible during a cycle can accumulate into a significant pool of water overnight or during a weekend away. Where the plumbing allows, turn off the isolation tap on the inlet hose when the machine will not be used for an extended period. See our guide on whether to turn the taps off when not in use.
Need a Repair?
If the leak source is identified but beyond straightforward DIY repair, a qualified engineer can diagnose and fix it quickly.
Guides for Specific Leak Locations
Leaking From the DoorDoor seal holes, worn flanges, and dirty door glass – causes and how to check each one.
Leaking From the Soap DrawerWater escaping from the dispenser drawer area – by timing and cause.
Leaking From Underneath or When Not in UseFill hose pressure drips, pump seepage, and intermittent leaks explained.
Leaking Only on SpinWhy some leaks only appear during the spin cycle and what causes them.
Frequently Asked Questions
How do I find where my washing machine is leaking from?
Slide newspaper under the machine and run a cycle with a normal load inside. Check the newspaper before it becomes fully saturated – the position of the first dampness indicates which side or area the water is entering from. Also note exactly when in the cycle the water appears: during filling, during the wash, or on spin. Each timing pattern points to a different set of likely causes.
Why does my washing machine only leak sometimes?
Intermittent leaks are usually triggered by specific conditions: certain load types, specific wash temperatures, or particular stages of the cycle. Heavy loads bounce more on spin and stress seals differently. Hot washes cause rubber components to expand. A full drum holds more water that can reach higher in the machine. Always test with the conditions that reproduce the leak rather than with an empty cold cycle.
Water appears at the bottom of the door – is that a door seal leak?
Not necessarily. Water from the soap dispenser drawer can track along the underside of the control panel and drip off the bottom of the door, appearing to be a door leak. Check the soap drawer area first. If water is confirmed to be coming from the door itself, inspect the door seal flange and the door glass contact area. See our guide on washing machine leaking from the door.
Should I turn the water tap off when the washing machine is not in use?
Where the plumbing allows, yes – particularly if going away for a weekend or longer. Fill hose connections remain under mains pressure when the machine is off. A very slow drip that causes no visible problem during normal use can accumulate into significant water damage overnight. Turning off the isolation tap when the machine will not be used for an extended period is a sensible precaution.
Washing machine drum not turning
This guide is for when the drum does not turn at all – not during wash, rinse, or spin. If the drum turns during wash and rinse but fails to spin at the end, that is a different fault: see our guide on washing machine not spinning. The most common causes of a drum that does not turn at all are a broken or dislodged drive belt, worn carbon brushes, or a motor fault.
Always unplug the machine before opening it or accessing any internal component. Some brushless motors and suppressors contain capacitors that can retain a dangerous charge after unplugging – wait at least 5 minutes before touching internal components. See our DIY repair safety guide.
Step 1: Spin the Drum by Hand
With the machine unplugged, open the door and try turning the drum by hand. The result tells you a lot immediately.
| What you feel | What it suggests | Next step |
|---|---|---|
| Turns freely, lighter than usual | Drive belt has probably come off or broken | Remove back panel and check the belt |
| Turns normally with no change | Belt is likely still on – fault is motor or electrical | Check motor, brushes, and wiring |
| Stiff or seized – will not turn | Belt off and entangled, drum bearing seized, or motor bearing seized | Remove the belt to isolate whether drum or motor is jammed |
When turning the drum from the front without removing the belt, you are turning both the drum and the motor simultaneously. If the drum feels stiff, remove the drive belt first to determine whether the stiffness is in the drum or in the motor.
Step 2: Check the Drive Belt
Remove the back panel and inspect the drive belt. It runs from the motor pulley to the larger drum pulley at the rear of the drum.
Belt broken or snapped
A broken belt needs replacing. Order a replacement from Spares4Appliances – specify your model number to get the correct part. Before fitting the new belt, identify why the old one broke.
Belt off but undamaged
A belt that has come off but looks intact can be refitted – but first check that the large drum pulley is not loose. If the pulley is loose, tighten it before refitting the belt. If the belt comes off again after refitting, there is an underlying fault. See our guide on drive belt keeps coming off.
A belt rarely comes off without a reason. The most common causes are a seized or noisy drum bearing (causing the drum pulley to wobble), a loose drum pulley, or a failing motor bearing. If the machine has been making rumbling or grinding noises before the belt came off, drum bearing failure is likely.
Step 3: If the Belt Is On – Check the Motor
If the belt is still on and not overly slack, and the drum turns normally by hand, the fault is in the motor or its control circuit. The drum is not turning because the motor is not running.
Carbon Brushes (Most Common Motor Fault)
Most washing machine motors with a traditional brush-type design rely on carbon brushes to transfer current to the rotating armature. As these wear down, they lose contact and the motor stops running. Worn brushes are the most common cause of a motor that fails to turn the drum.
Even heavily worn brushes may not be the actual cause of the fault. Before ordering and fitting new brushes, check whether at least one brush is charred, blackened, or sooty. This confirms the brushes have been arcing and are responsible for the motor failure. See our full guide on diagnosing whether carbon brushes need replacing. Carbon brushes for most brands are available from Spares4Appliances.
For guidance on fitting replacement carbon brushes, see our guide on how to fit Hotpoint and Creda carbon brushes – the process is similar for most brands.
A crackling or grating sound when the drum turns under load but not when empty is also a sign of worn or failing brushes.
Brushless Motors
Many modern washing machines use brushless (inverter) motors – generally quieter and more reliable than brush-type motors, and typically very quiet during the wash cycle. If the machine has a brushless motor, worn carbon brushes cannot be the cause.
Some brushless motors contain large capacitors that can retain a dangerous electrical charge for several minutes after the machine is unplugged. Do not touch any component inside the motor area without waiting at least 5 minutes after unplugging. If you have any doubt about whether your machine has a brushless motor, call an engineer rather than investigating internally.
Other Causes When Belt and Brushes Have Been Ruled Out
Wiring and connection faults
A broken wire or loose connector between the control board and the motor will prevent the motor from receiving power regardless of how sound the motor itself is. Check the wiring connectors at the motor plug and trace back along the wiring harness for any visible damage.
Tacho coil fallen off the motor
If the tacho coil – a small sensing coil on the motor – has physically fallen away from its mounting, the control board cannot detect whether the motor is running and will not allow it to operate. See our guide on tacho coil faults for more detail.
Open circuit suppressor (Hotpoint, Indesit, Creda, Ariston)
On certain machines running specific software, a failed mains suppressor can prevent the motor from running – with no error code displayed. This is counterintuitive and often catches out engineers. Do not attempt to work on or bypass the suppressor – these components can hold a dangerous charge after unplugging.
PCB or motor component failure
Open circuit field coil, failed thermal overload cutout (TOC), armature fault, or PCB failure can all prevent the motor from running. Many PCB faults are not visible to the eye – black soot around a component is sometimes just heat discolouration rather than burning damage. Do not replace expensive components speculatively.
Cannot Identify the Fault? Book an Engineer
Motor and PCB faults beyond the belt and brushes are difficult to diagnose without specialist equipment. A qualified engineer can diagnose and repair the fault quickly.
Related Guides
Do I Need to Replace the Carbon Brushes?How to check whether worn carbon brushes are causing the motor fault before buying replacements.
Drive Belt Keeps Coming OffThe main causes of a drive belt that repeatedly comes off – including drum bearing failure and loose pulleys.
Washing Machine Not SpinningWhen the drum turns during wash but will not reach spin speed at the end of the cycle.
How to Fit Carbon BrushesStep-by-step guide to fitting replacement carbon brushes on Hotpoint, Creda, and similar motors.
Frequently Asked Questions
Why is my washing machine drum not turning at all?
The most common causes are a broken or dislodged drive belt, worn carbon brushes in the motor, or a wiring fault between the control board and the motor. Start by spinning the drum by hand to determine whether it turns freely (suggesting a belt or motor fault) or feels stiff or seized (suggesting a bearing failure or entangled belt). Then check the belt and motor in that order.
The drum feels lighter than usual when turned by hand – what does that mean?
This strongly suggests the drive belt has come off or broken. With the belt removed, the drum spins freely without the resistance of the motor. Remove the back panel and check the belt. If it has come off but looks undamaged, check the drum pulley for looseness before refitting. If it has snapped, replace it and investigate why it broke.
How do I know if my machine has carbon brushes?
Brush-type motors are typically identifiable by a louder sound during wash (the commutator and brushes produce a faint noise) and by accessible brush holders on the side of the motor that can be removed for inspection. Brushless motors are generally very quiet – you mainly hear water movement during wash. If unsure, check the model documentation or ask an engineer before opening the motor.
Can I replace the drive belt myself?
In most cases, yes – provided the back panel can be removed and the new belt looped onto the pulleys. It is one of the more accessible DIY washing machine repairs. Order the correct belt for your model number from Spares4Appliances. Before fitting, check the drum pulley is tight and inspect the motor pulley for any damage that might have caused the old belt to break or come off.
Get rid of washing machine smells
Washing machine smells are caused by a build-up of grease, bacteria, and black mould inside the drum, door seal, and internal hoses. This is almost always the result of exclusive use of low-temperature washes and liquid or colour detergent – which provide no antibacterial or grease-cutting action. Regular 60-degree maintenance washes and powder detergent containing bleaching agents are the most effective prevention and cure.
A bad smell from a washing machine is rarely just an odour problem. The greasy slime that causes the smell also rots hoses and door seals, blocks the pressure system, and over time can destroy the drum spider – the aluminium cross-shaped bracket that supports the drum. Left untreated, this build-up significantly shortens the life of the machine.
What Causes a Washing Machine to Smell?
The root cause is almost always a combination of low-temperature washing and detergents that contain no bleaching agents – liquid detergents, gel capsules, and colour-safe detergents all fall into this category. Without hot water and bleaching agents working together, grease, bacteria, and mould are not removed from the internal surfaces of the machine. They accumulate in the door seal, sump hose, drum, and internal pipework.
What accelerates the problem
- Washing exclusively at 30 or 40 degrees
- Using liquid detergent, capsules, or colour-safe powder exclusively
- Using quick wash programmes regularly
- Using less than the recommended detergent quantity
- Not using any hot maintenance wash cycle
- Keeping the door closed after washing – trapping moisture inside
What prevents the problem
- Regular 60-degree washes, especially for bedding and towels
- Using powder detergent containing bleaching agents as the primary detergent
- Using the correct quantity of detergent as specified on the packet
- A monthly maintenance wash at 90 degrees with no laundry inside
- Wiping the door seal dry after use
- Leaving the door ajar between washes to allow the drum to dry out
If the smell appears to come from around the machine rather than from the drum itself, the cause may be a plumbing fault rather than internal build-up. See our guide on smells caused by plumbing faults.
The Damage Goes Beyond the Smell
The greasy, bacterial slime that causes odours does not just smell – it actively damages the machine over time.
Rots hoses and door seals
The slime accumulates in the folds of the door seal, in the sump hose, and in the internal pipework. It softens and degrades rubber over time, causing seals to split and hoses to fail prematurely.
Blocks the pressure system
The pressure chamber and hose that tells the machine how much water is inside can become partially blocked with accumulated residue. This causes overfilling faults, incorrect water levels, or premature spin – symptoms that appear to be electronic faults but are caused by contamination. See our guide on washing machine overfilling.
Destroys the drum spider
The drum spider is the aluminium bracket inside the machine that supports the drum on its bearings. Bacterial acids produced by the slime attack aluminium specifically, causing one or more of the spider arms to corrode and break off. When this happens the drum cannot be supported, and the machine is effectively beyond economic repair. This is one of the most expensive consequences of neglected internal cleaning.
Open the door and pull the rubber seal back where it meets the inner drum rim. Check the underside of the folds. Visible grease, black slime, or mould at this point means the contamination has already spread throughout the machine’s internal surfaces and hoses. Act now before damage becomes irreversible.
How to Clean a Smelly Washing Machine
How effective a clean can be depends on how badly the machine is affected. Mild odour – clean the door seal, run a hot maintenance wash, and change washing habits. Serious contamination with visible slime throughout the door seal – a hot wash with a cleaning agent may help, but if the machine has been running this way for years the internal damage may already be significant.
Maintenance Wash Cycle
Run an empty 90-degree wash cycle with no laundry inside. Do this at least monthly if using low-temperature washes regularly. This is the single most effective cleaning action available without any additional product.
Commercial Washing Machine Cleaners
Specialist washing machine and dishwasher cleaning products are effective at freshening a relatively clean machine and helping to remove light limescale deposits. They are less effective at shifting a serious build-up of grease and black slime – no cleaning product can substitute for regular hot washing over an extended period. Cleaning products and limescale removers are available from Spares4Appliances.
Soda Crystals
Soda crystals dissolve grease effectively. Pour half a packet into the soap drawer while the machine is filling with water (not directly into the drum – they may wash straight through to the sump hose without working). Run on a hot wash with no laundry inside. Using this monthly helps prevent accumulation and is particularly useful for machines that are predominantly used on low-temperature programmes.
White Distilled Vinegar
White distilled vinegar has a reasonable reputation as a washing machine deodoriser. Half a cup poured into the soap drawer at the start of a hot wash cycle – not into the drum, where it may bypass the system – is the recommended method. Be aware that regular use of vinegar can degrade rubber door seals and hoses over time, so this is best used occasionally rather than as a routine treatment.
The Best Long-Term Prevention
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Switch to powder detergent containing bleaching agents as the primary detergent for most washes. Liquid detergents, capsules, and colour-safe powder contain no bleaching agents and allow bacteria and grease to accumulate unchecked. See our guide on which type of detergent works best.
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Wash bedding and towels at 60 degrees wherever wash labels allow. Regular 60-degree washes kill bacteria, cut through grease, and prevent accumulation without needing additional cleaning products.
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Run a monthly maintenance wash at 90 degrees with no laundry inside. This is particularly important for households that use predominantly low-temperature programmes.
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Use the correct quantity of detergent. Underusing detergent produces acceptable wash results in the short term but allows grease and bacteria to accumulate inside the machine. Follow the dosage on the packet for the soiling level and local water hardness.
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Leave the door ajar after every wash. Wipe the door seal dry and leave the door slightly open to allow the drum and seal to dry out completely between washes. A permanently wet drum interior accelerates mould and bacterial growth.
Cleaning Products and Spare Parts
Related Guides
Black Mould in Washing MachinesCauses of black mould specifically and how to tackle it on door seals and inside the drum.
Black Jelly in the Soap DispenserWhat causes the black slimy substance in the dispenser drawer and housing – and how to remove it.
Limescale in Washing MachinesHow limescale builds up, the damage it causes, and how to prevent and remove it.
Greyish White Coating on the DrumWhat causes a white or grey film on the drum interior and how to remove it.
Frequently Asked Questions
Why does my washing machine smell even though I use it every day?
Frequent use at low temperatures with liquid or colour detergent is one of the main causes of the problem. Without hot water and bleaching agents, grease, bacteria, and mould are not removed from the drum, seal, and internal hoses – they accumulate with every wash regardless of how often the machine is used. Switching to powder detergent and introducing regular 60-degree washes will stop the build-up from worsening and gradually reverse it.
Should I leave the washing machine door open after use?
Yes. After each wash, wipe the door seal dry with a cloth and leave the door slightly ajar. This allows the drum, seal, and internal surfaces to dry out between washes. A permanently damp drum interior creates ideal conditions for bacterial and mould growth – which is the root cause of washing machine odours.
Can a cleaning product fix a seriously smelly washing machine?
Commercial cleaning products and soda crystals can freshen a mildly contaminated machine and help remove light limescale. They are much less effective against a heavy build-up of grease and black slime that has accumulated over months or years. In severe cases, the internal damage – rotted seals, blocked pressure hose, corroded drum spider – may already be significant regardless of cleaning.
How often should I do a maintenance wash?
At least once a month for machines used predominantly on low-temperature programmes or with liquid detergent. Run an empty cycle at 90 degrees – no laundry, no detergent, or with soda crystals or a specialist washing machine cleaner. Households that regularly wash at 60 degrees with powder detergent containing bleaching agents may only need a maintenance wash every two to three months.
Can a smelly washing machine damage laundry?
Yes. The grease and slime responsible for the smell can transfer onto laundry during the wash cycle, leaving greasy marks or causing washed items to smell unpleasant even immediately after washing. This is one of the clearest signs that the machine’s internal build-up has become serious and needs addressing immediately.
Washing machine jumps and bangs on spin
The most common cause of a washing machine jumping and banging on spin is an unbalanced load – either too little laundry, too much, or items that settle unevenly. On a new machine, check the transit packaging has been removed. Regular severe banging that is not load-related can cause expensive damage and needs an engineer to diagnose.
Occasional slight movement on spin is normal, particularly on tiled or smooth floors where rubber feet can slide. Severe or regular banging is not – and ignoring it risks progressive damage to the drum, suspension, and bearings that becomes increasingly expensive the longer it continues.
Step 1: When Does the Banging Occur?
The timing of the banging is the most useful first diagnostic clue.
| When it occurs | What it suggests | Action |
|---|---|---|
| At random points during washing – not on spin | Motor surge fault – drum spinning when it should be tumbling slowly | Stop using the machine – engineer required |
| As soon as the motor starts at any speed | Motor has lost control of slow wash speeds – possible tacho coil or PCB fault | Engineer required – see our guide on tacho coil faults |
| Only during proper spin – especially starting up or slowing down | Most likely an unbalanced load or suspension fault | Check loading, machine level, and suspension |
| Any spin since newly installed | Transit packaging may not have been removed | Check and remove all transit bolts before using again |
New Machine? Check the Transit Packaging First
All new washing machines are shipped with internal transit packaging – metal bolts and foam blocks that hold the drum completely rigid during transport. If not removed before first use, the drum cannot move on its suspension and all the movement generated on spin is transferred directly into the machine casing, causing violent side-to-side banging.
Running on spin with transit packaging in place can cause serious damage to drum bearings and suspension very quickly. Instructions for finding and removing the transit bolts are in the machine’s manual or on a label on the rear panel. See our washing machine installation guide.
Check the Load
An unbalanced drum is the most common cause of spin banging when the machine itself is working correctly. Watch the drum during the slow distribution phase that runs for a minute or two before fast spin begins.
Signs of an unbalanced load before spin
During the pre-spin distribution phase, an unbalanced drum lurches from side to side rather than rotating smoothly. Large flashes of bare drum on each revolution indicate laundry has settled on one side with the other side empty. The machine may thump the casing gently at this stage while trying to redistribute the load – if it cannot balance it, it may refuse to spin entirely rather than proceed and cause damage.
Under-loading causes more problems than over-loading
Surprisingly, too little laundry is more likely to cause an unbalanced spin than too much. A small number of heavy items – towels, jeans, a single duvet – tend to clump together on one side rather than distributing evenly. A well-mixed, moderately full load distributes most reliably. See our guide on how to load a washing machine correctly.
Check the machine is level
An unlevel machine rocks more readily and amplifies any imbalance. Check the machine is level front-to-back and side-to-side and that all four feet are in firm contact with the floor. On smooth or tiled floors, an anti-vibration mat provides grip and damping that can significantly reduce movement. On shiny floors, rubber feet may simply slide rather than grip – a mat resolves this too.
Still Banging With a Correctly Loaded Machine?
If the machine is level, transit packaging has been removed, loading is correct, and it still bangs severely on spin, there is an underlying mechanical or electrical fault. These are not load-related and will not resolve without investigation.
Possible mechanical causesWorn or failed shock absorbers that can no longer damp drum movement on spin. Worn drum bearings allowing the drum to move beyond its normal range. These faults typically worsen progressively – the earlier they are addressed the less expensive the repair.
Possible electrical causesA motor control fault causing the motor to surge or lose the correct speed profile during spin. A component that overheats, cuts out, and cuts back in – causing a sudden uncontrolled speed change. These faults can be intermittent and harder to reproduce for an engineer.
A drum that is repeatedly thrown against the casing wears out bearings, bends suspension components, and can eventually damage the outer drum. A fault that is inexpensive to fix early becomes much more expensive if ignored. If load-related causes have been ruled out, stop using the machine on high spin speeds and arrange an engineer visit.
Need an Engineer?
Non-load-related spin banging requires a proper diagnosis. A qualified engineer can identify and repair the fault before it becomes more expensive.
Related Guides
Washing Machine Is NoisyBearing noise, belt noise, and other causes of a noisy washing machine during wash or spin.
How to Load a Washing Machine CorrectlyThe right technique for loading to avoid unbalanced spins and get the best wash results.
Washing Machine Not SpinningWhen the machine won’t reach spin speed or refuses to spin – causes and how to diagnose them.
How to Pull a Washing Machine Out SafelyHow to move the machine for investigation or repair without damaging floors or hoses.
Frequently Asked Questions
Why does my washing machine bang on spin?
The most common cause is an unbalanced load – particularly a small number of heavy items that settle on one side of the drum. Check the machine is level and that transit packaging has been removed on a new machine. If loading, levelling, and transit packaging have all been checked and the banging continues, an underlying mechanical fault such as worn shock absorbers or bearings is likely.
Is it dangerous to keep using a washing machine that bangs on spin?
If the banging is caused by an unbalanced load it is generally not damaging in the short term, though it is hard on the suspension. If the banging is severe, regular, and not load-related, continued use will progressively damage bearings, suspension components, and potentially the outer drum. A fault that is straightforward to repair early can become uneconomical to fix if left. Reduce spin speed or stop using high-speed spin until the cause is identified.
Why does a small load cause more banging than a full load?
A small number of items – especially heavy ones – tend to clump together on one side of the drum as it spins. The asymmetric weight creates a significant imbalance that the machine struggles to correct during the pre-spin distribution phase. A well-mixed, moderately full load distributes much more evenly around the drum, giving the machine the best chance of balancing successfully before it accelerates to full spin speed.
My new washing machine bangs on every spin – what is wrong?
Check that all transit packaging has been removed. This is the most common cause of a brand new machine banging severely on spin. The transit bolts hold the drum completely rigid – without them removed the suspension cannot work and the drum movement on spin transfers directly into the casing. The transit bolts are usually on the rear panel of the machine. Instructions for removing them are in the manual.
What causes too much foam in the washing machine?
Excess foam is almost always a detergent issue rather than a machine fault. The most common cause is using too much detergent for the water hardness or load size. Counterintuitively, using too little can also cause some extra foaming because front-loading detergents contain anti-foaming agents that need to be present in sufficient quantity. The fix is using the correct amount for your water type.
Excessive foam inside the washing machine looks alarming but is rarely a sign of a machine fault. It can, however, cause real problems if severe enough – including preventing the machine from draining and leaking suds out through the door or dispenser drawer.
Why Too Much Foam Is a Problem
What excessive foam causes
- Foam can leak from the machine – through the door seal, the soap drawer, or steam vents
- Heavy foaming can prevent the pump from draining the water correctly
- Too much foam cushions clothes from rubbing against each other – which reduces cleaning effectiveness. Mechanical agitation is a core part of how washing machines clean laundry
- Foam in the drum during spin can contribute to spin imbalance and machine noise
Causes of Excess Foam and How to Fix Them
Too much detergent
The most common cause. The correct quantity is specified on the detergent packet and varies with water hardness and soil level. Soft water areas require less detergent than hard water areas. Check the dosing guide on the packet and compare it to how much you are actually using.
Too little detergent
Counterintuitive but real – front-loading washing machine detergents contain anti-foaming agents. If too little detergent is used, there may not be enough anti-foaming agent present, which can cause some additional foam. This is less dramatic than the excess from too much detergent but worth knowing if you have been reducing dosage trying to fix the problem.
Water softer than expected
Soft water produces more foam from the same quantity of detergent than hard water. If you have moved to an area with softer water, or if your water supply has changed, the same detergent dose that worked before may now be excessive. Check your water hardness with your local water company and adjust the dosage accordingly.
Anti-limescale products over-softening the water
Products such as Calgon and similar anti-limescale tablets soften the water inside the machine during the wash. If you use these in a hard water area, you should use the detergent dosage specified for soft water – not hard. Using the hard water dose with an anti-limescale product effectively means you are using too much detergent for the actual water softness during the wash cycle. See our guide on whether Calgon is worth using.
Overloading the drum
An overloaded drum restricts rinsing – soap suds from the main wash cannot be fully removed because the laundry is packed too tightly for water to circulate effectively. The residual suds then become visible during the spin cycle. See our guide on how to load a washing machine correctly.
Machine Won’t Drain Due to Excess Foam
If the foam is so heavy the machine cannot pump out the water, do not keep running the drum – the agitation and pumping action whips the foam up further and makes the situation worse.
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Try fabric softener first. Pour a cap-full of fabric softener into the dispenser drawer and flush it through with cold water. Fabric softener reacts with and suppresses foam relatively quickly. Wait a few minutes and check whether the machine can now drain.
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If that does not work, flush with cold water manually. Without running the machine, pour cold water directly into the drum in large quantities. Lower the drain hose to allow this water to drain by gravity. Raise the hose and repeat. This dilutes the foam progressively without the drum agitation making it worse. This takes time but is effective.
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Once foam has subsided, run a rinse-only cycle to clear any remaining detergent from the machine and laundry before running a normal programme.
Foam Only on Rinse and Spin
If excess foam is only visible during rinse cycles or spin – not during the main wash – a partial pump blockage is the likely cause. A partial restriction in the pump or filter allows enough water to drain to trigger the spin, but not fast enough to fully remove the soap suds from the main wash. These then get whipped up again during the spin.
Clean the pump filter first. If that does not resolve it, see our guide on washing machine not draining properly for further diagnosis.
Related Guides
Related Guides
Which Type of Detergent Is Best?Powder, liquid, biological, and non-biological detergents – what they do differently and when to use each.
Is Calgon Worth Using?Whether anti-limescale products genuinely protect your machine – and how they interact with detergent dosage.
Washing Not Getting CleanHow foam, loading, and detergent type all affect wash results – and what to change first.
How to Load a Washing MachineCorrect loading technique for the best rinse results and to avoid overloading causing foam problems.
Frequently Asked Questions
Why is there too much foam in my washing machine?
The most common cause is using too much detergent for the water hardness. Soft water produces more foam from the same dose than hard water. If you use anti-limescale products such as Calgon, these soften the water further and you should use the soft water dosage on the detergent packet, not the hard water dosage. Using too little detergent can also cause some foam because front-loading detergents contain anti-foaming agents that need to be present in sufficient quantity.
Can too much foam stop the machine from draining?
Yes. Very heavy foaming can prevent the pump from draining effectively. Do not keep running the drum if this happens – the agitation makes the foam worse. Pour a cap of fabric softener into the dispenser drawer and flush with cold water to suppress the foam, or manually flush cold water through the drum by lowering and raising the drain hose repeatedly to dilute the suds without agitation.
Why do I only get foam on rinse and spin?
A partial pump or filter blockage is the likely cause. The restriction allows enough water to clear for the machine to proceed to spin, but not enough to fully remove the soap suds from the main wash. These then foam up again during the spin cycle. Clean the pump filter as a first step.
I reduced the detergent dose but still have too much foam – why?
If you have reduced the dose significantly, you may now be below the threshold needed for the detergent’s anti-foaming agents to work properly. Front-loading washing machine detergents are designed to produce minimal foam, and they contain agents specifically to suppress it – but these only work correctly at the right dosage. Check the packet for the correct quantity for your water hardness and use exactly that amount.
Washing machine won’t spin just one item or very small load
Modern washing machines refusing to spin single items or very small loads is normal behaviour – not a fault. Out-of-balance protection software detects that the drum cannot distribute a small load evenly and refuses to spin rather than risk damage to the machine. The solution is to add more items to the load to help it balance. If the machine won’t spin at all regardless of load size, that is a different fault unrelated to this issue.
The frustration of a new machine that won’t spin a bath mat, a single jumper, or a few towels is very common – particularly when an older machine managed it without difficulty. This is not a regression in washing machine design; it is a deliberate protection system that prevents real and significant damage.
Why Modern Machines Refuse to Spin Unbalanced Loads
Older machines would attempt to spin regardless of how the load was distributed in the drum. When the load was badly balanced – a few heavy items on one side, an empty section on the other – the drum would become violently unstable at spin speed. This caused serious damage to machines that was entirely avoidable.
What happened with older machines and unbalanced loads
- Violent spinning that dented the machine casing and damaged suspension components
- Tubs breaking free of their suspension and smashing control panels and hoses – causing floods
- Machines walking across floors and colliding with cupboards and worktops
- Suspension rods punching through floorboards
- Complete machine write-offs from a single badly balanced load left to run unattended
This was not an occasional problem – badly balanced loads spinning out of control was a regular cause of machine damage and write-offs when out-of-balance protection did not exist or was rudimentary. The protection system that now refuses to spin small loads is preventing exactly this.
How Modern Out-of-Balance Protection Works
Early out-of-balance systems used simple microswitches attached to the suspension that cut the motor when triggered. Modern systems are more sophisticated – software monitors the motor’s power draw as the drum turns. An evenly distributed load creates consistent resistance as the drum rotates. A heavy item on one side creates a different resistance profile as the drum brings that side up and over – the software detects this uneven pattern and either attempts to redistribute the load at slower speed, or refuses to proceed to fast spin if redistribution fails.
The characteristic signs of the machine trying to redistribute before spin – the drum rocking slowly from side to side, the motor changing tone, visible sections of empty drum through the door glass – are the machine actively working to balance the load before committing to spin speed. If it cannot achieve a balance within the allowed time, it either aborts the spin entirely or completes on a reduced spin speed to minimise imbalance forces.
What to Do When the Machine Won’t Spin a Small Load
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Add more items to the drum.
The most reliable fix. A bath mat that won’t spin alone will usually spin successfully with two or three towels added. The extra items give the machine enough mass to distribute around the drum. Old towels kept specifically for this purpose are useful for padding out small loads of heavy items.
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Try a lower spin speed.
Most machines offer a choice of spin speeds. A lower speed generates less centrifugal force, which means a less balanced load can still spin without triggering the protection. 400 or 600rpm may succeed where 1200 or 1400rpm triggers a refusal.
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Re-open the door and rearrange the load.
If the machine has stopped mid-cycle due to imbalance, opening the door and physically redistributing the items around the drum sometimes allows the machine to proceed. Spreading laundry around the entire circumference of the drum rather than leaving items in a clump helps.
Large Drum Machines Are More Prone to This
A larger drum requires proportionally more laundry to achieve an even distribution. A 7kg or 8kg drum machine may refuse to spin three large towels that a 5kg machine would handle without difficulty – simply because those same towels represent a smaller proportion of the larger drum’s circumference and leave more empty space.
If most of the laundry done in a household consists of small loads – a few garments, single items, children’s clothes – a very large drum machine will cause more spin refusals than a medium-sized drum. A 7kg or 8kg drum only delivers its capacity benefit when regularly loaded to near capacity. See our guide on drum capacity comparison before purchasing.
Premium machines such as Miele tend to have more sophisticated suspension and out-of-balance software that is better calibrated to distinguish loads that will spin safely from those that genuinely risk damage. Budget machines typically have simpler systems that are more conservative in what they will allow to spin. This difference in sensitivity between price points is real but no comparative data across brands is currently published.
Machine Won’t Spin At All?
If the machine refuses to spin on any load regardless of size, that is a separate fault unrelated to out-of-balance protection.
Related Guides
How to Load a Washing MachineHow to load correctly to avoid unbalanced spins – including why under-loading causes more problems than over-loading.
Washing Machine Jumping and Banging on SpinWhen spin banging is load-related and when it indicates a mechanical fault that needs an engineer.
Drum Capacity ComparisonHow different drum sizes compare in practice – relevant to choosing a machine that suits your typical load sizes.
Washing Machine Not SpinningWhen the machine won’t spin at all on any load – causes that are genuine faults rather than out-of-balance protection.
Frequently Asked Questions
Why won’t my washing machine spin a single item?
Modern washing machines use out-of-balance detection software that monitors whether the load is evenly distributed before allowing fast spin. A single item or a very small load of heavy items settles on one side of the drum, creating an imbalance the machine detects as a risk. Rather than spin a badly balanced load – which can cause significant mechanical damage – the machine either refuses to spin or reduces the spin speed significantly. This is normal behaviour and not a fault.
My old machine could spin single items – why can’t this new one?
Older machines either had no out-of-balance protection or had very basic systems that could be overwhelmed. Modern machines have much more sophisticated detection that catches imbalances that older machines would have spun through – sometimes causing serious damage in the process. The inability to spin small loads is a deliberate protective feature, not a step backwards in capability.
How do I get a washing machine to spin a bath mat?
Add other items to the load – old towels work well. The machine needs enough material distributed around the drum to achieve a balance. A bath mat alone almost always ends up on one side; two or three towels added alongside it give the machine enough mass to distribute. If the bath mat still refuses to spin, try a lower spin speed – 600rpm rather than 1200 or 1400rpm.