Safety First: Unplug the dryer and allow it to cool before working near the heater or exhaust duct.

Step 1 – Access the exhaust thermistor: On most KitchenAid dryers, the exhaust thermistor is mounted on the blower housing near the exhaust outlet. Remove the front lower panel or front panel as required by your model.
Step 2 – Inspect wiring: Check the two‑wire connector to the thermistor for a secure fit and no corrosion or damage. Reseat the connector.
Step 3 – Test thermistor resistance: Disconnect the thermistor and measure resistance with a multimeter at room temperature (~70°F/21°C). Typical reading is around 10k–12k ohms (check service sheet for exact spec). An open (OL) reading indicates failure.
Step 4 – Replace faulty thermistor: If the thermistor is open or far out of spec, remove the mounting screw, replace with a new OEM exhaust thermistor, and reconnect the harness.
Step 5 – Clear lint: While open, vacuum lint from the blower housing and internal ducting to ensure proper airflow.

After reassembly, restore power and run a test cycle to confirm the F22 code is cleared.

Dryer will not start and displays F22, or stops shortly after starting with F22 on the display.

Possible Causes