Garry for Model Number MZF34X16DW01 My upright freezer keeps freezing up I have checked the continuity of the heater and it is reading 36.4. Is there something else that may be causing it to freeze up?
Answer Gary, with the power supply cord unplugged, the defrost circuit would need to be tested from the main control using the wires found at the connection CN1. From the brown wire at pin 5 to the white wire at pin 1, there should be a resistance reading between 30 to 42 Ohms. If the reading shows open, then the thermal fuse in the harness W11244436 has failed. If the reading is good, the next step would be testing the evaporator thermistor WPW10383615 and the cabin thermistor WPW10384183 using the connection CN2 on the main control. The wires found at pin 1 and 2 will be used for the evaporator thermistor, and the wires at pin 3 and 4 would be used for the cabin thermistor. The thermistors, at room temp 77°F should have a resistance value of about 2700 Ohms, or at 36°F (in ice water) with a value of 7964 Ohms. Read More... Answered by AppliancePartsPros.com | Tuesday, July 27, 2021