Error code F05 on some Hotpoint (and some Indesit) washing machines means the pressure switch has “jammed” on. So the washing machine thinks it is full of water and refuses to spin. It may indeed be full of water – but not necessarily.
Before a washing machine spins the laundry, it needs a signal that the water has pumped away successfully. The last thing it wants to do is spin with the drum full of water. The water would be thrown out through the soap dispenser and various other places. So it waits for a signal from the pressure system so that it knows it’s safe to spin. The error F05 indicates that for various possible reasons it’s not getting that signal.
This error can be caused by a pump fault or blockage in the filter. If this is the case then clearly when the fault occurs the drum should be full of water or at least still have a fair amount inside. If so follow this not draining water guide and help washing machine stuck full of water.
However, if the water has pumped away OK and you still get this error then it’s not a pump blockage. It’s a fault elsewhere. Suspects are that the pressure switch itself is jammed, (i.e. the switch is physically stuck), or it’s being held on by air pressure due to a blockage in the pressure chamber bottle at the bottom of the thin tube (connected to the pressure switch).
This latter fault can hold air pressure in the tube keeping the pressure switch on. In this case, pulling off the small tube at the base of the pressure switch should result in an audible click as the pressure is released and the pressure switch springs back to off. Bear in mind that if looking at the machine some time after the fault trapped air could slowly seep out over time. For more details check this article Faults on pressure system
More causes of F05 error
Other faults listed as possible causes for this error are, faulty connections, and even the PCB, which I wouldn’t advise replacing. If you have this fault and can see the washing machine is full of water then you may be able to fix it by following the first link in this article. Otherwise you would probably be better calling an engineer – call an engineer
Don’t get carried away
Over the years, even experienced appliance repairmen have been seriously injured or killed repairing appliances.
If you aren’t experienced and trained for working on electrical and mechanical appliances you should probably book an appliance engineer.