Re: Homark Oven Spares
It is unlikely that the thermostat is at fault as, in general, they either work or don’t. They’re pretty dumb devices all things considered and when they fail they tend to be either fully on or fully off.
It could be a faulty door seal allowing more heat that is acceptable to escape, it could be that the burner needs cleaning or there could be some other reason for the extended cooking periods. But in short I’d be looking elsewhere for the cause of the problem.
As it’s gas the usual rider applies, for your own safety if you are in any way unsure, get a proffesional CORGI repairer in to resolve the issue.
K.