Refrigerator Temperature Control Does Not Shut Off at the Right Temperature

Temperature Control Range

• One thing to note when setting the temperature controls on a refrigerator is the accepted temperature range for both the refrigerator and freezer. Most refrigerators can be set between 33 and 46 degrees Fahrenheit and the freezer can be set between minus 6 and 8 degrees Fahrenheit. If either control is set at the top or bottom of the range, the refrigerator may have some difficulty maintaining that specific temperature and may not stop at the precise temperature.

Refrigerator Doors

• Check the refrigerator and freezer doors to make sure the door is sealing tightly each time. If there is something keeping the door from closing or the door gasket is dirty and failing to seal, warm air will continue to enter the refrigerator, changing the internal temperature and affecting temperature control. Clean off the gasket with a damp cloth and keep items away from the door so the door can close all the way.

Condenser Coils

• A major factor in refrigerator cooling is the condenser coils, which cool the air that passes into the refrigerator. Since the coils are located behind the refrigerator or underneath the refrigerator, dirt and dust can accumulate, which slows down the air flow and affects the proper temperature monitoring. Turn off power to the refrigerator before cleaning the condenser coils with a vacuum cleaner brush attachment.

Control Boards

• The electronic temperature controls on a refrigerator are operated by means of two control boards, which could be making a bad connection and causing temperature point problems. While skilled owners might be able to remove and replace the control boards in a refrigerator, most owners should contact the refrigerator manufacturer for service to either or both control boards.

Thermostats

• Another potential problem with the refrigerator is if the thermostat is failing, which will cause the refrigerator to run past the cooling set points. If the defrost thermostat is defective, the refrigerator may also be building up ice or frost in either compartment or not running the automatic defrost cycle on a regular basis. Call a qualified service professional for assistance if other troubleshooting steps fail.