if you have had your electrics checked by a qualified person then they should have told you that the fault lies with your hotpoint, if the electrics have been properly checked and found to be fine , then the fault will be an earth fault ( if Big switch tripping , Rcd ). or dead short in electrical board of hotpoint, probably water causing dead short, get an engineer out and obviously dont use hotpoint until checked and fixed
Robbo, November 2008