Refrigerator Freezer is Cold But Refrigerator is Warm

The temperature control thermostat directs voltage to the compressor, evaporator fan motor, and condenser fan motor (if applicable). If the temperature control thermostat is not working properly, it may prevent the refrigerant system from running properly, resulting in the refrigerator compartment not cooling as expected. To determine if the thermostat is defective, rotate the thermostat from the lowest setting to the highest setting and listen for a click. If the thermostat clicks, it is not likely defective. If the thermostat does not click, use a multimeter to test the thermostat for continuity. If the temperature control thermostat does not have continuity at any setting, replace it.

A refrigerator door gasket should form an airtight seal around the appliance's frame to keep the cold air in and the warm air out. If the door gasket is twisted or torn, gaps can form that will allow warm air in, resulting in the refrigerator compartment being warm even though the freezer compartment is cold. Inspect the door gasket for any damage and replace with a new one if necessary.

The air damper control opens and closes to let the proper amount of cold air into the refrigerator compartment. If the damper does not open properly, it won’t let enough cold air into the refrigerator. Check the damper control to determine if it is broken or stuck closed.

The thermistor monitors the refrigerator temperature and sends the temperature reading to the control board. The control board then regulates power to the compressor and evaporator fan based on the thermistor readings. If the thermistor is defective, the compressor and evaporator fan may not run when necessary, or may run too frequently. To determine if the thermistor is defective, test it with a multimeter. The thermistor resistance should change in conjunction with the refrigerator temperature. If the thermistor resistance does not change, or the thermistor does not have continuity, replace the thermistor.

The defrost heater assembly turns on several times throughout the day to melt away any frost that may have accumulated on the evaporator coils. If the defrost heater assembly is defective, the defrost system will not work, and frost will continue to accumulate on the evaporator coils. This will result in cooling problems where the freezer compartment might appear to be cold but the refrigerator compartment is warm. To determine if the defrost heater is defective, use a multimeter to test it for electrical continuity. If the defrost heater does not have continuity, replace it.

The temperature control board provides voltage to the compressor and fan motors. If the control board is faulty, it may stop sending voltage to the compressor or fan motors. Control boards are often misdiagnosed—before replacing the control board, first test all of the more commonly defective components. If none of the other components are defective, consider replacing the temperature control board.

The defrost thermostat monitors the temperature of the evaporator coils. When the coils drop below a set temperature, the thermostat contacts close to allow power to flow to the defrost heater during the defrost cycle. In the defrost cycle, the defrost heater melts away any frost that may have accumulated on the evaporator coils. If the defrost thermostat is defective, the defrost heater may not activate. This will cause the evaporator coils to frost over which can result in cooling problems where the freezer compartment might appear to be cold but the refrigerator compartment is warm. To determine if the defrost thermostat is defective, use a multimeter to test it for electrical continuity. If the defrost thermostat does not have continuity when it reaches the low temperature of its operating range, replace it.

Compressor

Temperature Sensor

The defrost control board determines how often to run the defrost cycle. If the defrost control board fails, the refrigerator will not run the defrost cycle, and frost will continue to accumulate on the evaporator coils. If the evaporator coils are frosted over, the refrigerator will work harder to remove heat. As a result, the refrigerator may be too warm. If the defrost thermostat and defrost heater are working properly, the defrost control board is likely defective and will need to be replaced.

The defrost timer turns on the defrost heater several times throughout the day to melt any frost that may have accumulated on the evaporator coils. If the defrost timer is defective, it might not advance into the defrost cycle, or it might not send power to the defrost heater during the defrost cycle. If the defrost system isn’t working, frost will continue to accumulate on the evaporator coils, and the refrigerator will have to work harder to remove heat. As a result, the refrigerator may be too warm. To determine if the defrost timer is defective, slowly advance the dial into the defrost cycle. The compressor should turn off and the heater should turn on. If the timer does not send power to the defrost components or advance out of the defrost cycle within 30 minutes, this indicates that the defrost timer is not advancing. If the defrost timer is not advancing, replace it.

Closing Cam

Fan Motor

Filter Drier

The main control board might be defective. However, the control board is very rarely the cause of the problem. Before replacing the control board, first test all of the more commonly defective components. If none of these components are defective, consider replacing the main control board.

The control board might be defective. However, the control board is very rarely the cause of the problem. Before replacing the control board, first test all of the more commonly defective components. If none of these components are defective, consider replacing the control board.