Whirlpool Dryer Error Code F23

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

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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 coils. Replace defective parts as needed.
8. Inspect high-limit thermostat and cycling thermostat: Test these thermostats for continuity at room temperature. If open, replace them.
9. Swap or inspect control board/relay: If sensors and heater components check out, a stuck relay or failed control board can cause F23. Boards are expensive—confirm with thorough testing before replacement.
10. After repairs, run test cycles: After replacing parts, run several test cycles with an empty load and monitor temperatures and venting to confirm the fault is resolved.

Maintenance / Prevention Tips

• Clean the lint screen after every load to maintain airflow.
• Vacuum lint from the dryer interior and around the drum periodically (every 3–6 months).
• Clear the exhaust vent and duct annually (more often if long duct runs) to prevent clogs and overheating.
• Use rigid or semi-rigid metal ducting instead of plastic foil or vinyl to reduce lint buildup.
• Keep the outside vent hood clear of debris, bird nests, or obstructions.
• Avoid overloading the dryer; oversized loads restrict airflow and increase run time.
• Replace worn or crushed vent hose to maintain proper airflow and reduce backpressure.
• Inspect plug and power cord periodically for damage and secure connections.
• Schedule a professional dryer inspection annually if you use the dryer heavily.
• Check and replace damaged or brittle wiring if noticed during cleaning or repair.
• Use the appropriate cycle and heat level for fabric types to avoid excessive temperatures.
• Install a smoke detector and (for gas dryers) a carbon monoxide detector nearby for safety.
• Keep dryer area clean—remove lint piles, boxes, or flammable items near the machine.
• Replace thermal fuse or thermostats as preventive maintenance if the dryer is older and has fluctuating temperatures.
• Keep dryer door and drum seals in good condition to allow proper tumbling and airflow.
• Use dryer balls or properly sized loads to improve airflow between garments.
• Check manufacturer updates or recalls for your model for any known heating-system issues.
• Use professional installation to ensure proper vent type, length, and termination for best performance.
• When storing or moving the dryer, protect the vent and controls from impact damage.
• Keep the dryer level—an unlevel machine can stress components and wiring over time.

FAQs

Conclusion / Safety Notice

F23 is a heating-related code that should be taken seriously. Before attempting any repair, unplug the dryer or shut off the breaker and follow safety precautions—gas dryers require additional steps (shut off the gas) and should only be worked on by experienced technicians if gas components are involved. If you’re not comfortable testing electrical components or interpreting diagnostic results, contact a certified appliance repair technician. Professional service can ensure correct diagnosis, safe repair, and peace of mind.

When in doubt, stop using the dryer and arrange for professional help—safety first.