Hi AEG Competence built in oven B1180-1-M serial34695436. Oven as on to heat up but cut out knocking off all power in house. Put back on but no heat and element cold. Tests since then but just won’t heat up. Replaced fan oven temperature control as this had previously gone also knocking oven off but it didn’t actually need replaced. Any ideas please? Was going to dive in and get element but just want to make sure first in case it’s something like thermostat. Doesn’t seem to be any marks on element but it is black at back inside housing. Thanks.