Customer Questions and Answers for Main Control Board Kit (Dishwasher) by Ge

Ralph, the heater WD05X30818, TCO (part of the wash pump kit WD49X23778, and the water turbidity sensor WD21X22598 would need to be tested. With the power supply turned off, the heater and TCO can be tested from the two wires at the main control WD21X22276 connection J702. From wire to wire, there should be a resistance of 18-23 Ohms. If not, the heater would need to be tested directly to identify if the failure is in the heater or the TCO. If the heater has resistance when tested directly but there was not resistance when testing the wires, the TCO has failed. If the heater does not have resistance when tested directly, it has failed. If resistance is present when testing from the wires at the main control, the turbidity sensor would need to be tested for resistance using the wires at the connection J711. From the brown and orange wire at pin 11 to the orange wire at pin 8, the resistance should be 10K Ohms if the sensor is good. If these parts tested properly, the failure would be in the main control.