On 17/12/2019 14:46, Graham. wrote:

Help me out here. I thought I knew how a door interlock works and I
suppose the PTC thermistor could overheat and cause a fire, but I
can't see how the load of the main heating element influences it.
Does anyone know what the actual mode of faliure is?

https://www.bbc.co.uk/news/business-50811686
https://youtu.be/O9zfue1NzGU

my interlock melted about a year ago and replaced it myself....something
else went a couple of months ago and the hotpoint is now out the back
door......bring back hot fill .....