the unit needs replaced the bi-metal switch has gone o/c,common fault ,uts easy to do,remove the plug from the power supply,remove all the screws from around the door,the steel inner door will lift off,be very careful about the wiring,the unit is screwed to the inner door,with wires going to it,take note of where they go,remove old unit,fit new one,replace the wiring,then put it all back together
mm, January 2013