heater relay on the pcb in the fascia is well know for bad solder joint to relay pins or track burnt out.you can resolder and repair pcb track with fuse wire.
to get to it drop the door down.you will see screw down the inside edge of the stainless inner door.remove them.now you will see screws around inside edge holding the control panel on.remove them.carefully remove control panel.2 plastic clips hold pcb to fascia.release these and slide pcb down.take picture or make a note of ALL connections to pcb noting positions they go to Carefully.remove all wiring.split the plastic box holding the electronics in using tabs around the edge and unclip pcb from inside.find a rectangle block inch by half inch approx (this is the heater relay).resolder connections to relay pins and check pcb track for breaks.refit in reverse
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January 2012