fanover run pcb blown 2 times Help help

Guys i ve got a friends new world electric double built in fan oven which cuts out after 20 mins, had it happend loads of times and it was the overun pcb, ordered it and as soon as i turned the juice on it blew to bits, put the original module back on and it wgoes back to working fine for 20 mins etc, thought i had a dodggy mod so i orded another one only for it to do the same, 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure i got the right one as checked with Masterpart and it looks identical too, swoped it wire for wire so not doing nothing wrong there, it blew the same 2 components on the new modules but the original one looks fine,

WHAT DO I DO NEXT????