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Since your machine is a washer dryer and your towards your wits end why not try this: turn the power off. remove the work top, pull off the tumble dryer heater wires and isolate them with tape. Then try the machine and see what happens with the door lock/programme problem. Make sure you do not select the drying mode.
By heater, I assume you mean the heating element at the top of the drum? Hmmm, the symptoms I experience are, either the programme fails to start because the machine thinks the door is still open or at the end of the laundry washing cycle. Do you still think it could be related?
If it helps, rather than the usual two clicks, I get 5 clicks, followed by two and sometimes another 5 followed by another two. It may or may not start a cycle at that point. Also, if a cycle completes without problems, if I don’t open the door and try a new wash cycle it continues to work normally.
yes the top heater is the dryer heater. What can happen / could happen is that the heater goes to earth though it is not taking out the trip – this can happen whether you use the dryer mode only sometimes or more often. When it goes to earth it might be by a variable amount one day more or less on an other day = somtimes the machine lock works sometimes it don`t – this is all very common on modern contraptions – typical C21st ! In other words the earth leakage temporarily affects the pcb which could have an effect on the door lock. Getting several faults in parallel is not unknown with any of this modern stuff irrespective of the brand/make (Chinese or otherwise) just that some makes are more prone than others. Might be on the right tracks might not be you will not know until you disconnect the dryers heater wires to give it ago. If you set your ordinary test meter on the highest ohms setting (with a good battery/ batteries fitted) and put one lead to one of the heater terminals (with both heater wires disconnected) and t`other to the aluminium heater`s manifold housing (i.e. an earth or to an earth wire) you might read a heater to earth reading though if you don`t it doesn`t mean that the heater has not gone to earth as you would normally use a megger (500volt dc tester) to test for an earthing problem hence suggestion to remove the heater wires thus disconnecting the heater out of the circuit. May not make any difference one jot but worth a go. Should that do the trick you would need a new dryer heater.
Update:
So the heater element and the motor were replaced yesterday. So far, four cycles have been run without any issues. Luckily, the engineer had two spare motors as the first one he fitted made a strange sound just before turning the drum so he replaced it with another new unit.
Hopefully, this will put and end to the drama otherwise it was either order a new loom or ask for a new machine. Thanks everyone for your help.
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