Whirlpool Dryer Error Code F28

Whirlpool Dryer Error Code F28 — What It Means

The F28 error on a Whirlpool dryer typically signals a fault related to the dryer sensing and control system. Depending on the model and year, this code is commonly associated with communication or sensor problems that affect how the dryer monitors moisture, temperature, or motor function. When the dryer cannot accurately read conditions or cannot communicate between modules, it may display F28. This fault can result in longer drying cycles, clothes that remain damp, unexpected shutdowns, or the dryer refusing to start. In some cases a persistent F28 can lead to heat control issues or strain on the motor, increasing the risk of component failure or overheating if ignored. Always confirm the exact definition of F28 for your specific model using the owner manual or service literature, since code meanings can vary by model family.

Common Causes

• Faulty moisture sensor or sensor bar making incorrect readings
• Malfunctioning thermistor or temperature sensor
• Communication failure between the main control board and motor control or user interface
• Wiring harness damage, loose connectors, or corroded terminals
• Blocked or restricted exhaust vent or lint buildup causing abnormal conditions
• Stuck or damaged blower wheel or motor problems affecting airflow
• Defective user control board or electronic control board
• Door switch or interlock issues preventing proper cycle sensing

Troubleshooting Steps

1. Power cycle the dryer. Unplug the dryer or switch off the breaker for 1 minute, then restore power to clear temporary faults and see if the code returns.
2. Check the vent and lint path. Remove lint from the lint screen, inspect the dryer exhaust hose and vent to the outside, and vacuum any lint build up. Restricted airflow can cause sensor anomalies and longer cycles.
3. Inspect the moisture sensor. Locate the sensing bars inside the drum, clean them with a damp cloth to remove residue, and ensure they are not damaged or disconnected.
4. Examine wiring and connectors. With the dryer unplugged, inspect wiring harnesses at the control board, motor, and sensors for loose plugs, burnt connectors, or broken wires.
5. Test the thermistor and sensors. Use a multimeter to measure resistance of the thermistor or temperature sensors per your model’s service manual. Replace if readings are out of spec.
6. Check the motor and blower wheel. Ensure the blower wheel spins freely and the motor runs without strange noises. A failing motor or obstructed blower can trigger control errors.
7. Run a diagnostic or service test. If your model supports it, enter the dryer diagnostics mode to read stored fault codes and sensor values for more precise troubleshooting.
8. Replace suspect control parts only after confirming failure. If diagnostics point to the main control board, motor control board, or user interface as the cause, replace the faulty module with OEM parts.
9. If you find a gas line issue or smell gas, or if the dryer continues to overheat, stop using the unit and call a qualified technician immediately.
10. If the code persists after basic checks, contact Whirlpool support or a certified appliance repair technician for advanced diagnostics and safe replacement of electronic parts.

Maintenance / Prevention Tips

• Clean the lint screen after every load to maintain airflow and sensor performance.
• Inspect and clean the dryer vent and exterior vent hood every 3 to 6 months.
• Use the proper type of vent duct material and keep ducts as short and straight as possible.
• Vacuum the lint trap cavity and behind the lint screen periodically to prevent buildup.
• Do not overload the dryer; heavy loads reduce airflow and extend cycle times.
• Wipe the moisture sensor bars with a soft cloth and mild cleaner if residue accumulates.
• Check vent hoses for kinks or crushing after moving the dryer.
• Replace foil or plastic flexible vents with rigid or semi-rigid metal ducting when possible.
• Ensure dryer installation is level and stable to reduce wear on the motor and drum bearings.
• Schedule an annual professional inspection for gas dryers to verify gas connections and safety devices.
• Keep the area around the dryer clean and free of combustibles and lint piles.
• Follow load and drying cycle recommendations in the owner manual for best sensor accuracy.
• Use sensor dry cycles periodically instead of timed dry to allow the sensors to function and calibrate.
• Replace worn or frayed wiring immediately to prevent intermittent faults and communication errors.
• Inspect door hinges and latches to ensure the door closes firmly and the door switch is engaged.
• When replacing parts, use OEM or manufacturer-recommended components to ensure compatibility.
• Keep firmware or control board updates in mind for smart models; consult Whirlpool service for guidance.
• Store detergents and fabric softeners as instructed to avoid residues that coat sensor bars and drum surfaces.
• Document model and serial numbers and keep the manual accessible for quick reference when codes appear.

FAQs

Conclusion and Safety Notice

F28 is a message that your dryer needs attention to sensors, control communications, or airflow. While many causes are straightforward to address, others involve electrical diagnostics or gas components that can be hazardous. Always unplug the dryer or turn off the circuit before working on electrical components. For gas dryers, shut off the gas supply and call a qualified technician if you suspect a gas leak or if the repair involves gas valves or lines. If you are unsure of the cause or if the fault persists after basic troubleshooting, contact Whirlpool support or a licensed appliance repair professional to diagnose and repair the issue safely.

Need help identifying the exact cause for your model? Have your model and serial number ready when you contact support or a technician to get the fastest and most accurate assistance.