The F22 error means outlet thermistor fault — the exhaust temperature sensor is reading out of range or has failed.
The Whirlpool dryer displays the F22 error and halts the current cycle until the underlying problem is fixed.
Check these in order. The first cause accounts for the majority of F22 errors.
The thermistor is a temperature-sensitive resistor — its resistance changes with temperature. When it fails, it reports an out-of-range value that the control board can't interpret, triggering F22.
Vibration can loosen the connector at the thermistor. An intermittent connection reads as an open circuit — same fault signature as a failed thermistor.
A restricted vent causes exhaust temperature to fluctuate wildly. The thermistor reads real values, but they're erratic enough to trigger an F22 fault in the control board's monitoring logic.
Rare. If a known-good thermistor installed on a clean vent still produces F22, the control board's ADC input for the thermistor signal may have failed.
Follow these in order. Stop as soon as the error clears.
Electrical components — always unplug first.
The thermistor is clipped to the exhaust duct inside the dryer, typically accessible by removing the back panel. It's a small disc component with two wires connected by a harness.
Disconnect and firmly reconnect the harness connector at the thermistor. Inspect the connector for corrosion or bent pins.
Disconnect the thermistor wires and measure resistance with a multimeter set to ohms. At room temperature (70°F/21°C), a functional thermistor reads approximately 10,000 ohms (10kΩ). A reading of 0 or infinity (OL) indicates a failed thermistor.
Unclip the old thermistor from the duct, disconnect the wires, and snap in the replacement. Reconnect the harness. Test with a full dry cycle — F22 should not reappear.
For warranty service, contact Whirlpool support ↗ or a certified appliance technician.