How to Replace a Chest Freezer Thermostat

What You'll Need
Replacement thermostat
Needle nose pliers

When people notice the first sign of problem with their freezer thermostat, they often make the mistake of purchasing a new freezer. Purchasing a new freezer is costly and unnecessary. In many cases, a little bit of troubleshooting can help to save time and money.

Step 1: Replace the Thermostat

If your chest freezer is not cooling down to the right temperature, the thermostat needs to be replaced. One way to test the thermostat is to set it to a colder temperature.  If the freezer cools down to your new setting, the thermostat is not broken. If there is no change in the temperature, it must be replaced.

Step 2: Remove the Panels

To replace a chest freezer thermostat, the panels must be removed. Before removing the panels, unplug the chest freezer. After that, locate the thermostat. For most models, the thermostat is located on top of the chest freezer. If not, the thermostat is located in the rear compartment or underneath the floor panel.

Step 3: Remove the Screws or Retaining Clips

Depending on the structure of the chest freezer, some screws and retaining clips need to be removed in order to gain access to the inside panel of the freezer.

Step 4: Locate the Two Wires and Remove the Thermostat

Next, locate the two wires joined from the thermostat to the terminal. You will have to use a needle nose pliers to grip the wires and pull them away from the terminal. When pulling the wires, make sure to do it gently to prevent any damage.  You should not use the pliers to grip the middle part of the wires because they are fragile. Once the wires are pulled out, it should be possible to remove the thermostat.

Step 5: Install the New Thermostat

With the old thermostat removed, you can now install the new thermostat in the freezer. To install the new thermostat, put the thermostat in the appropriate place in the freezer. After that, use the needle nose pliers to connect the two wires to the terminal.

Step 6: Reassemble the Freezer

When you are done, screw back the panel. If the the old thermostat was unclamped from the freezer previously, clamp the new thermostat in the same location. The ends of the wires should be connected to the new thermostat. If you remove any inside panels, screws or clips, you must replace them fully. Finally,  switch on the power to test if the thermostat is working properly.

You should not turn off the power until you have prepared all the working tools, especially if there is food inside the freezer. Prior to replacing the thermostat, perform a thorough inspection of your freezer to check for other problems that are causing the problem. The condenser coil on the fridge must be clean with plenty of room for ventilation. Use a vacuum cleaner to clean away the dust that has accumulated behind the freezer.