Hmmm .. I've got one of these... disappointed with it since I bought Miele for the reliability! The heater bank / element causes the problem with a build up of disposites close to the heating coil. It becomes damp and eventually an earth fault occurs tripping out your RCD. These deposites can be removed but you run the risk of damaging the insulation so go carefull or buy a new heater unit. Tis a bad design where it requires larger gaps between the heating element & case.
Andy
August 2010