i have just fitted a new elerment at the back of the oven 2 mths ago but now for some reason for the last 4 weeks when the oven is used with fan and elermnt rcd on consumer unit trips out,you can run the fan with no heat all day long no probs but soon as you put the heat on after 8 mins or so trip out,but not the 40 amp cooker trip but the 80 amp rcd,any help would be a bonus.Dean