|Troubleshooting refrigerator defrost heater problems_1.pdf||Troubleshooting refrigerator defrost heater problems
The freezer or refrigerator evaporator is not defrosting but measuring the heating
element from the main PCB indicates ~2600 Ohms.
The measurement indicates that the Thermo-Fuse (Bi-metal) is good but defrost heating
element is open.
The main defrost heating element is in parallel with a small heater, ~ 4 watts, which
measures about 2600 Ohms. This example shows the freezer defrost heater in parallel
to the ice duct heater where both come on at the same time. The refrigerator is similar.|