The main oven does not get very warm. I have fitted a new stat .After fitting the stat the temperature was increasing each time I increased the stat setting and it was knocking off each time. But when you say. put oven on fan and boost. it only gets warm, and never gets hot enough to cook. Any Ideas thank you.
the fan oven heating element has blown.this is in the back of the oven cavity around the edge of the main oven fan.take the back plate covering the fan out from inside the oven cavity to gain access