Ole Ray for Model Number MDB7100AWW My dishwasher simply quit. The door switchs had good continuity, so I looked at the control board and found two large components, in series, that got hot enough to blacken/burn the board, I am sure they are not making continuity in there solder joints. I fear that if I simply put in a new control board the same thing will happen again. What could have caused this, and how do I check everything to make sure a new control will fix the problem? Better yet, what are these two components, could I simply replace them - the runs on the board are fine.
Answer Ole Ray, You're on the right track, but The resistors in the motor circuit and the heater circuit on the control board, have a tendency to discolor and blacken, but the unit will operate. You need to check and make sure you have 110 VAC across the double black and double white wires at the control board with the door switches activated. if you have the voltage, you'll need a new control board, no voltage would be a bad door switch or wiring issue. Here's some meter usage information should you need it [http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html] Good Luck and Thanks Read More... Answered by AppliancePartsPros.com | Tuesday, May 1, 2012