HI I had a simular problem.I tested the heater element with a multi metre for continuity. it was OK. Traced fault back to the control unit. I removed and opened the control unit. a copper track on the intergrated circuit board that carries the high current to and from the relay on the IC bd had burn out. Repaired by soldering copper wirer along the existing track. I hope this helps PS I found this fault after unpluging the dishwasher from the mains power. WORK SAFLEY>
Goodtime GXXXXXX, August 2008