That dryer thermister causes a multitude of weird faults on these newer inde/hotp washer dryers. Easy to eliminate, just takes 2 seconds to hook up a new one.Then half an hour to remove and split the heater box if it was faulty!!
Had this on quite a few of the newer hotpoints and indesits. Have also found that a damaged cable to or a poor connection to the wash NTC can also do the same thing. Also made the mistake of changing the pcb on the first one I came accross.