The probable cause of ice formation on only one side of the cooling plate in the lower compartment of your fridge, while the freezer is working fine, is a malfunctioning defrost system. The cooling plate in the lower compartment is typically responsible for circulating cool air to keep the fridge cold. Here's a breakdown of the likely cause and potential solutions:
- Defrost system malfunction: The defrost system in a refrigerator consists of a defrost heater, defrost thermostat, and a defrost timer or control board. Its purpose is to periodically melt any frost or ice that accumulates on the cooling plate or evaporator coils. If the defrost system fails to function properly, ice can build up on the cooling plate and reduce cooling efficiency.
Possible solutions:
- Check the defrost heater: Ensure that the defrost heater is functioning correctly. A defective heater may not melt the ice efficiently. You may need to consult a technician to test and replace the heater if necessary.
- Inspect the defrost thermostat: The defrost thermostat monitors the temperature of the cooling plate or evaporator coils. If it is faulty, it may not signal the heater to turn on when needed. A technician can test the thermostat's continuity and replace it if required.
- Examine the defrost timer/control board: The defrost timer or control board determines when the defrost cycle should occur. If the timer or control board is faulty, it may not initiate the defrost cycle properly. A technician can diagnose and replace the defective component if necessary.
It's important to address the defrost system malfunction promptly to prevent further ice buildup and restore the cooling efficiency of the refrigerator's lower compartment. Consulting a qualified technician or contacting the manufacturer's customer service can provide specific guidance based on your refrigerator model and help ensure the proper repair of the defrost system.