dishwasher showing f8 no heat? customer has allready had the board changed by another engineer he said the heater was ok but for some reason hes not come back.so befor I go is there any thing else that could cause it not to heat.apart from a broken wire which I hope hes checked.
don’t know the particular model but a lot of units use a pressure switch to make sure heater cant come on with no water
may also be a water level problem