Can you post the model number please.
Ok was the drum turning before the pump got jammed up?
If you set it to a spin only is the pump running?
Will the durm not turn at all on a spin?
Ok a blocked pump wont cause the motor to burn out or anything like that.
What you need to do is pull the washer out and take the back panel off.
From there make sure the belt is still on.
If the belt is fine then check the wiring at the bottom going to the motor. If thats fine then you need to remove the motor and at the back either side are the carbon brushes.
Take them off and inspect them. If they have worn down then they will need to be replaced.
Check them and see what you find and let me know.
Not sure what you mean by ''seems unlikely to fail in this mode''
Theres not resets for thermistor as if a thermister was faulty it wont cause the motor not to work. As the thermistor is for the heater.
If the washer fills and drains but no motor action just check the brushes and see what you find.
Ok 2mm is very low so is proberly the cause here.
They should be at least minium 5mm as any shorter it wont make contact on the armature.
Try and replace them and see how it goes from there and let me know.
Yes its more a coincedence with the pump and motor. As in all my years of fixing washers ive never seen a blocked pump burn a motor out. As with the switches in there the control board wont allow the motor to try and spin with it full of water.
As you have the brushes out pull on the short one and refit it back on.
If you have a multimeter test for contonuity between the two carbon brushes.
If not contonuity then we know its the brushes at fault here.