If, by chance, he has "fixed the thermal breaker" I bet he's just desensitized it in some way - and that just increases your chance of frying a more expensive component. Heck, he might have just bypassed it altogether.
This idea of a "fix" is predicated on the idea that something was broken - I don't buy that yet. Someone care to have another go at persuading us it was ever "broken"?
Ann Arbor, MI