Replacing the Thermistor on a Whirlpool Refrigerator: A Step-by-Step Guide
One of the most common issues that can arise in a Whirlpool refrigerator is a faulty thermistor, which is responsible for monitoring the temperature inside the fridge. When the thermistor fails, it can lead to temperature fluctuations, causing your food to spoil or your energy bills to skyrocket. In this article, we will walk you through the process of replacing the thermistor on your Whirlpool refrigerator, making sure to provide you with a detailed and comprehensive guide.
Understanding the Thermistor
The thermistor is a type of temperature sensor that is used to monitor the temperature inside your refrigerator. It is usually located near the evaporator coils and is connected to the control board. The thermistor sends signals to the control board, which then uses this information to adjust the compressor and fan speed to maintain the desired temperature.
Tools and Materials Needed
Before you begin the replacement process, you will need to gather the necessary tools and materials. These include:

- A new thermistor (compatible with your Whirlpool refrigerator model)
- A multimeter (for testing the thermistor)
- A screwdriver (for removing the access panel)
- A wrench or pliers (for removing the electrical connector)
- A soft cloth or gloves (for handling the electrical components)
Disassembling the Refrigerator
To access the thermistor, you will need to disassemble the refrigerator. This involves removing the access panel, which is usually located at the back or bottom of the fridge. You will also need to disconnect the electrical connector from the thermistor. Make sure to take note of the orientation of the connector before removing it.
Removing the Access Panel
Locate the access panel, usually marked with a label or icon. Remove the screws that hold the panel in place using a screwdriver. Gently pry the panel away from the fridge, taking care not to damage any surrounding components.
Disconnecting the Electrical Connector
Locate the electrical connector connected to the thermistor. Use a wrench or pliers to release the connector from the thermistor. Take note of the orientation of the connector before removing it.

Removing the Old Thermistor
With the access panel removed and the electrical connector disconnected, you can now access the thermistor. Remove the screws that hold the thermistor in place, taking care not to damage any surrounding components. Gently pull the thermistor away from the fridge, making sure to note the orientation of the wires.
Installing the New Thermistor
With the old thermistor removed, it's time to install the new one. Take the new thermistor and insert it into the mounting bracket, making sure it's securely fastened with screws. Connect the electrical connector to the new thermistor, taking care to match the orientation of the wires.
Reassembling the Refrigerator
With the new thermistor installed, it's time to reassemble the refrigerator. Put back the access panel, making sure it's securely fastened with screws. Reconnect the electrical connector to the control board, taking care to match the orientation of the wires.
Testing the New Thermistor
Before closing the access panel, make sure to test the new thermistor using a multimeter. Measure the resistance of the thermistor at different temperatures to ensure it's functioning correctly.
With these steps, you should now have successfully replaced the thermistor on your Whirlpool refrigerator. Remember to dispose of the old thermistor properly and follow proper safety precautions when working with electrical components.
By following this guide, you should be able to troubleshoot and replace the thermistor on your Whirlpool refrigerator, ensuring your appliance runs efficiently and effectively.