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rcd blows when oven socket turned on ?

hi all iv just got a second hand oven its a baumatic b721 every time i try to turn power switch on it blows the rcd have had socket tested and all is fine their anyone any ideas please
dave williams, November 2011
2 choices element to earth or switch contact welded.still stand by element unless it is wired up incorrectly?

ck, November 2011
it was stored but dont know for how long couple of weeks we were told

dave williams, November 2011
we had a sparky test the socket and he put a test on cooker and said it seems to have a reading of power on when all is turned off ?????? it got him baffled lol

dave williams, November 2011
has it been stored for a while?.if so could be damp in elements causing your house rcd to trip.need to test which element it is that is low insulation down to earth with a meter or disconnect elements one by one and retry each time

ck, November 2011
Faulty oven

SD, November 2011
link Click here to see other fixes for Baumatic.