Refrigerator Temperature Control Doesn't Shut Off

Settings

• Begin by checking the settings on your refrigerator. Sometimes the problem is as simple as settings that have become accidentally changed. If you have mistakenly set your temperatures too low, the control system will continue register this and start running cycles in order to reach a range that your refrigerator was not designed for, preventing that panel from shutting off.

Timer Issues

• Timers control how your refrigerator cycles, and are especially important when it comes to freezer cycles. Freezers need a defrost cycle in order to remove frost build-up. Sometimes, the system can become stuck on this defrost cycle. When this occurs, your timer may be stuck on defrost. Cleaning the timer, inspecting it for gear- or corrosion-related problems and replacing components as needed can help fix this problem.

Circuit Issues

• Sometimes the temperature control in your refrigerator stays on because of a circuit malfunction. All it takes is one or two relays to become stuck permanently and never shut off. If this occurs, you can use an ohmmeter to test the wiring in your temperature control panel to make sure it is all still operating correctly. You may need to replace relays and wiring to restore normal functionality.

Thermostat Problems

• Your refrigerator thermostat uses a set of thermistors, which are small sensors that measure the temperature at various places in your refrigerator compartment. If these thermistors fail, or your thermostat malfunctions, your control panel may receive false signals that keeps your refrigerator running. You can test these components using an ohmmeter, but it may be more prudent to call a professional.