... or a design fault in the drying which allows fluff to get to the element where it cannot be removed by the user.Tumble drier fires are usually the result of misuse , failure to clear filters regularly causing fluff to ignite on the heater element or drying items unsuitable ,
As I've said, I'm sure that the great majority of fires related to tumble dryers originate in the dryer itself, not due to any over-heating of plug/socket. It happened to us, since we had one of the dryers with such a design fault. Despite our keeping the filter, and accessible parts of ducting, clear of fluff, it 'caught on fire' (but fortunately did not harm because we detected the smoke before anything nasty happened), at a time when the plug/socket were not even warm.