Whirlpool Dryer Error F23 — Meaning, Causes & Fixes
The Whirlpool dryer error code F23 typically signals a problem in the dryer’s heating or temperature-sensing circuit. That can mean an open or shorted temperature sensor (thermistor), a failed high-limit thermostat or thermal fuse, a stuck heater relay on the control board, or wiring/venting conditions that cause abnormal temperatures. When F23 appears, you may notice longer drying cycles, inconsistent heat (either no heat or intermittent heating), frequent cycle interruptions, or in worst cases, overheating risks that can damage clothing or present a fire hazard. Because heating faults can affect safety and performance, diagnosing F23 promptly helps avoid energy waste and potential hazards.
Common Causes
- Faulty thermistor (temperature sensor) or cycling thermostat
- Blown thermal fuse or failed high-limit thermostat
- Damaged or burned wiring harness or connector between sensors and control board
- Defective control board or stuck heater relay
- Broken or shorted heating element (electric dryers) or failed igniter/gas valve (gas models)
- Clogged lint screen, vent, or ductwork causing overheating or poor airflow
- Moisture sensor or sensor strip failure causing incorrect cycle sensing
- Incorrect installation or venting that leads to excessive backpressure and temperature errors
Troubleshooting Steps
- Power reset: Unplug the dryer (or turn off power at the breaker) for 1–5 minutes, then restore power to see if the code clears. This can reset the control board but does not repair failed parts.
- Check venting & lint: Clean the lint screen, open and inspect the exhaust vent at the wall, and remove lint from the duct. Restricted airflow can trigger temperature faults.
- Run a diagnostic/self-test: Put the dryer into service/diagnostic mode per your model’s manual to read stored codes and run heater tests. This narrows whether the board sees a sensor or heater fault.
- Inspect wiring & connections: With power off, visually inspect connectors, harnesses, and terminal blocks for burnt or loose connections—particularly around the control board, heater, and sensors.
- Test the thermal fuse: Disconnect power and use a multimeter to check the thermal fuse for continuity. A blown thermal fuse will show open circuit and needs replaced.
- Check the thermistor (temperature sensor): Locate the sensor (often clipped to the exhaust or blower housing) and measure resistance. Compare to specs in the tech sheet—an open or wildly out-of-range reading indicates replacement.
- Test heating element / gas components: For electric dryers, test the heating element coils and heating relay for continuity. For gas dryers, inspect the igniter and gas valve co