How to Fix Whirlpool Refrigerator Error FS

Encountering an ‘FS’ error code on your Whirlpool refrigerator can be a bit perplexing, but don’t worry, it’s a common issue we can help you diagnose and fix! This code specifically indicates a problem with your freezer’s temperature sensor, also known as the thermistor. Essentially, your fridge’s brain isn’t getting a proper reading from the freezer, often due to a short circuit or a disconnected sensor. Let’s dive in and get that freezer back to optimal performance.

What Triggers This Error

  • A faulty or damaged Freezer Temperature Sensor (Thermistor).
  • Loose, corroded, or disconnected wiring leading to the thermistor.
  • A short circuit within the thermistor’s wire harness.
  • Less commonly, a malfunctioning main control board sending incorrect signals.

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Your Repair Guide

  1. Safety First: Before attempting any repair, always unplug your Whirlpool refrigerator from its power source to prevent electrical shock.
  2. Locate the Freezer Sensor: The freezer thermistor is typically situated inside the freezer compartment. You’ll often find it clipped to the evaporator coil tubing or mounted near an air vent. Accessing it may require removing some internal panels or shelving.
  3. Inspect the Wiring Harness: Carefully examine the wires connecting to and from the freezer thermistor. Look for any visible signs of damage, such as cuts, pinched wires, or corrosion. Ensure all connections are tight and secure. Reattach any loose connections you discover.
  4. Test the Thermistor (Recommended): If you possess a multimeter, you can test the thermistor’s resistance. Refer to your appliance’s service manual or an online guide for the specific resistance values expected at various temperatures. A reading that deviates significantly from the normal range or indicates an open/short circuit confirms a faulty thermistor.
  5. Replace the Thermistor: If your visual inspection of the wiring is clear and secure, or if your multimeter test indicates a fault, the most probable solution is to replace the freezer temperature sensor. Disconnect the old thermistor and securely connect the new one.
  6. Reassemble and Test: Carefully replace all panels and components. Plug the refrigerator back into the power outlet and monitor the display for the FS error code. If the code no longer appears, you have successfully resolved the issue.

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