How to Fix Whirlpool Dryer (Duet) Error F:28 (F28)

Encountering the F28 error code on your Whirlpool Duet dryer indicates a problem with the moisture sensing system. This fault code specifically points to an issue where the control board isn’t receiving the expected input from the moisture sensor, which is crucial for determining cycle completion and preventing over-drying. Addressing this promptly can restore your dryer’s efficiency and prevent further complications.

Typical Reasons for F28

Understanding the root causes behind an F28 error is the first step toward a successful repair. This issue often stems from one of a few common problems:

  • Loose or corroded wiring connections leading to the moisture sensor bars within the dryer drum.
  • A faulty or failed moisture sensor itself, which can no longer accurately detect moisture levels.
  • Though less common, a damaged main control board could also misinterpret sensor signals.

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How to Resolve the F28 Error

Tackling the F28 error involves a systematic approach to inspection and replacement. Follow these steps carefully to diagnose and fix the problem:

  1. Disconnect Power: Always begin by unplugging your Whirlpool Duet dryer from the electrical outlet. Safety is paramount when working with appliances.
  2. Locate the Moisture Sensor: The moisture sensor typically consists of two metallic strips located on the front bulkhead inside the dryer drum, often near the lint filter housing.
  3. Inspect Wiring Connections: Carefully examine the wires connecting to the moisture sensor. Look for any signs of looseness, corrosion, frayed insulation, or breaks. Gently tug on the wires to ensure they are securely seated in their terminals. If you find loose connections, re-seat them firmly. Clean any visible corrosion using a fine-grit sandpaper or a wire brush.
  4. Assess Sensor Integrity: If the wiring appears to be in good condition with secure connections, the problem likely lies with the moisture sensor itself. These sensors can degrade over time and lose their ability to function correctly.
  5. Replace the Moisture Sensor: Should the wiring be sound, replacing the moisture sensor is the next logical step. Often, a new moisture sensor kit may include a new wiring harness as well, which is beneficial for ensuring optimal connectivity.
  6. Test the Dryer: After reassembling and ensuring all connections are secure, plug the dryer back into its power source. Run a test cycle to confirm that the F28 error code has cleared and the dryer operates as expected.

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