The defrost thermostat plays a vital role in the operation of refrigerators, specifically engineered to identify changes in the evaporator's temperature during the defrost phase. After the frost has fully melted, it deactivates the defrost heater.
This component is an Original Equipment Manufacturer (OEM) part designed for LG refrigerators and also fits Sears-Kenmore models. It functions by observing the evaporator coil's temperature, thereby preventing frost accumulation by alerting the control board to initiate a defrost cycle as necessary.
Over time, the defrost sensor assembly can deteriorate due to routine wear, electrical issues, or exposure to moisture and temperature fluctuations. A faulty sensor can lead to incorrect defrost cycles, excessive frost, diminished cooling efficiency, or an entire failure of the defrost process.
Indicators of a malfunctioning defrost sensor assembly include:
- Unusual frost accumulation on the evaporator coils
- Fluctuating temperatures within the refrigerator or freezer
- Increased energy usage
- Inadequate defrosting of the refrigerator
This OEM component effectively resolves challenges such as frost accumulation, failure to turn off, and insufficient refrigerator cooling.