I have an old refrigerator that I have been trying to get back into shape. I originally had a defrosting issue which was repaired with a new defrost thermostat. Now that the defrost cycle is working again, I am finding that the fridge is running continuously (fridge down to 32F, freezer -7F). I had the thermostat control set at the warmest possible setting (one more slight turn and it would switch to off) but it keeps cooling. I decided to replace the thermostat control which was straightforward. My problem is that I still have the exact same problem so not sure what else to check? My expectation is that at the recommended settings the fridge should be shutting off somewhere around 37-38F but mine keeps going even with a new thermostat control at the warmest possible setting. I would appreciate any advice. Thanks.
Understanding Continuous Cooling in Old RefrigeratorsIf your old refrigerator is running continuously and reaching temperatures lower than desired, even after replacing the defrost thermostat and thermostat control, this guide will help you troubleshoot and possibly fix the issue.
Faulty Thermostat Control
- Problem: Replacing the thermostat control didn’t resolve the over-cooling.
- Solution: Ensure the new thermostat is correctly installed and functioning. Consider the possibility of a faulty replacement part.
- Problem: Inadequate airflow can cause the refrigerator to overcool.
- Solution: Check for and clear any blockages around the vents to ensure proper air circulation.
Door Seal/Gasket Check
- Problem: Poor sealing can lead to continuous cooling.
- Solution: Examine the door seals. Test them by closing the door on a piece of paper; if it slides out easily, replace the seal.
Evaporator Fan Functionality
- Problem: A malfunctioning evaporator fan can cause uneven cooling.
- Solution: Verify the operation of the evaporator fan and ensure it is working correctly.
Condenser Coils Condition
- Problem: Dirty or blocked condenser coils can lead to excessive cooling.
- Solution: Double-check the cleanliness and condition of the condenser coils.
- Problem: A defective thermistor might send incorrect temperature readings.
- Solution: Check the thermistor and replace it if necessary.
Complete Defrost System Check
- Problem: Issues with the defrost system can contribute to cooling problems.
- Solution: Ensure all components of the defrost system, including the heater and timer, are operational.
Control Board Issues
- Problem: The refrigerator's main control board may be malfunctioning.
- Solution: This is complex and might require professional diagnosis and repair.