Should you turn off appliances at the socket when not in use?
Should you turn off your washing machine, dishwasher, or tumble dryer at the wall socket when you have finished using it? The risk of leaving an appliance plugged in is small but real. This guide explains why the risk exists, what it involves, and how to make a practical decision about your own situation.
Turning off an appliance at the wall socket when not in use is a sensible precaution that reduces risk. It is particularly worthwhile for washing machines and tumble dryers. The risk from leaving appliances plugged in is low, but it is not zero – and if the socket is easy to reach, there is little reason not to. If the socket is inaccessible, making it more accessible is worth considering.
Is There Really a Risk From a Switched-Off Appliance?
When an appliance is switched off but still plugged in, electricity continues to flow through part of the appliance. The appliance may be off, but the socket is live and voltage is present throughout the cable, plug, and into the early stages of the appliance’s internal circuitry – including the mains suppressor (filter), and in many cases to the control PCB, door lock, and control panel.
The risk of something going wrong while the appliance is not running is considerably lower than when it is in use. But it is not zero. Mains suppressors in particular can degrade and fail, and there are documented cases of tumble dryers and washing machines starting fires or producing electrical incidents while plugged in but switched off – including cases where the issue was confined to the wall socket and plug rather than the appliance itself.
Most incidents with appliances left on standby are very minor – a small electrical fault rather than a fire. But because the appliance is unattended and nobody is watching, even a small fault can develop into something more serious before it is noticed. This is the core argument for switching off at the socket when convenient.
Where Does Electricity Go Inside a Plugged-In Appliance?
Understanding this helps clarify what “switched off but plugged in” actually means electrically.
Electricity flows from the socket through the plug and along the mains cable regardless of whether the appliance is switched on. The cable and plug are live whenever the socket is live.
The first component electricity reaches inside the appliance. Its job is to reduce electrical interference. It remains live when the appliance is plugged in. Suppressors can fail over time and in rare cases have caused localised electrical incidents.
On many modern appliances, power reaches the main control board and display even when the on/off switch is in the off position. This allows features like programme memory and standby mode – but it also means more components remain live.
The door interlock on washing machines and dishwashers is typically powered even when the machine is off, to allow the door to remain locked after a cycle. This is another component that remains live when the appliance is plugged in.
How to Make a Practical Decision
Many millions of appliances are left plugged in permanently without incident. The risk per appliance per day is very low. But it is worth making a conscious decision rather than leaving it to chance.
If the wall socket is clearly visible and easy to switch off after every use – such as a socket above the worktop or on an easily accessible wall – there is very little reason not to turn it off. It takes a second and reduces risk at no real cost of effort. This is particularly relevant for washing machines and tumble dryers.
Many dishwashers are plumbed in with the socket located behind the appliance or inside a cupboard – awkward or impossible to reach routinely. In this situation, the practical question is whether the socket location can be improved. Moving the socket or rerouting to a more accessible point is a worthwhile investment if the appliance is used frequently.
If a dishwasher or washing machine socket is currently behind a cupboard full of other items, it may be possible to rearrange the plumbing and wiring so a more accessible socket is used instead. This is worth considering – particularly if you have a built-in appliance whose socket is behind a back panel or buried in a cupboard. An electrician can advise on moving or adding a socket in a more convenient location.
Appliance-Specific Guidance
- ✅Washing machine: switch off at the socket after every use where the socket is accessible. Washing machines have relatively complex electrical systems and are not designed to run unattended for extended periods. See also: is it safe to leave a washing machine running when out or in bed?
- ✅Tumble dryer: switching off at the socket when not in use is strongly advisable. Dryers are one of the more common sources of appliance fires and carry a higher inherent fire risk than most other household appliances due to lint accumulation. Never leave a tumble dryer running unattended.
- ✅Dishwasher: if the socket is accessible, switch off after each cycle. If the socket is inaccessible, consider whether it can be relocated. At minimum, ensure the dishwasher cycle has finished and the appliance has cooled before leaving the house.
- ✅Fridge and freezer: these must remain plugged in at all times to preserve food safety. The risk calculation is different for refrigeration appliances – they run continuously and there is no practical option to switch them off routinely.
Frequently Asked Questions
Is it safe to leave a washing machine or tumble dryer plugged in when not in use?
The risk is low but not zero. Electricity continues to flow through part of the appliance even when switched off, and components like the mains suppressor and control board remain live. The vast majority of appliances left plugged in experience no problems at all, but switching off at the socket when easy to do so is a sensible precaution – particularly for tumble dryers, which carry a higher inherent fire risk.
Does switching an appliance off make it completely safe?
Switching off at the appliance’s own on/off button reduces risk but does not eliminate it entirely – electricity still reaches the early internal circuitry. Switching off at the wall socket and turning it off removes all voltage from the appliance and is the most complete way to eliminate standby risk. Unplugging entirely is equivalent.
What if the wall socket is behind the appliance or in a cupboard?
This is a common situation with integrated dishwashers in particular. If the socket genuinely cannot be reached routinely, the practical options are: accept the risk and leave the appliance permanently plugged in, or consult an electrician about relocating the socket to a more accessible position. The latter is often straightforward and worthwhile for an appliance used every day.
Is a tumble dryer more risky to leave plugged in than a washing machine?
Tumble dryers are generally considered higher risk than washing machines when it comes to fire risk, primarily due to lint accumulation in the heating system and exhaust path. This risk is highest during operation, but the general advice to switch off at the socket when not in use applies at least as strongly to dryers as to washers. Never leave a tumble dryer running when you are out or in bed.
Should I unplug the dishwasher after each cycle?
If the socket is accessible, yes – this is good practice. If the socket is behind a back panel or difficult to reach, aim at minimum to ensure the cycle has finished and the dishwasher has cooled down before leaving the house. If you use a timed programme that runs overnight, consider whether the socket location can be improved to make routine switching off more practical.
My fridge stays on after the socket is switched off
I tried the fridge in another socket which turned the fridge off when it was turned off
Hello bet. The on off switch is either bypassed or faulty.
Hello Richard. As you can imagine I’ve seen many very poor examples, with mains sockets directly underneath parts of the plumbing that could easily leak and run water straight into the socket. But in many houses some thought has been given to the position of wall sockets that the builders know will be used for a washing machine. They may still have the wall sockets behind the washing machine or inside a cupboard, but they usually install a separate switch above the worktop somewhere that is easily accessible and often even labelled.
But generally speaking, especially in older houses, wall sockets are just badly placed and totally inaccessible far too often. Often tradesmen will have an overriding goal of what is easier for them. A perfect example of this is in my son’s brand new house where the mains socket for the washing machine was attached to the 1 mm thin ply board at the back of the under sink cupboard. As soon as you start pushing and pulling on the main socket it just came completely loose. I had to relocate it to the side of the cupboard and was able to screw it firmly into a proper surface.