GE Refrigerator Defrost Fuse (WR55X29255)

The GE Refrigerator Defrost Fuse is a thermal safety device that protects the defrost heater circuit by cutting power if the defrost system reaches an unsafe temperature. It works in line with the defrost heater and thermostat to ensure the automatic defrost cycle runs safely, preventing overheating that could damage the refrigerator's evaporator or surrounding components.

The GE Refrigerator Defrost Fuse can fail when the defrost system overheats repeatedly, causing the fuse to blow as a one-time protective measure. Unlike a thermostat that resets itself, a blown defrost fuse must be replaced, and it often points to an underlying issue such as a faulty defrost thermostat or heater that caused the temperature to spike in the first place.

These symptoms may indicate the defrost fuse in your GE refrigerator needs to be replaced:

- Frost or ice buildup on the back wall of the freezer compartment

- Refrigerator is not cooling properly despite the compressor running

- Food in the refrigerator section is warmer than expected

- Visible ice block covering the evaporator coils behind the freezer panel

- Defrost cycle does not appear to run at all

- Water pooling inside the refrigerator or leaking onto the floor