For the Whirlpool model WED6400SW0, the F22 error typically points to a faulty thermistor, which is responsible for monitoring the dryer’s temperature. When the thermistor fails, it can cause improper temperature regulation, leading to the dryer shutting down prematurely during heat cycles.

To resolve this issue:

1. Inspect the Thermistor: Use a multimeter to test the thermistor for proper resistance. A defective thermistor will need to be replaced.
2. Check Wiring: Ensure that the connections to the thermistor are secure and not damaged.
3. Clear Obstructions: Verify that the exhaust vent is clear of any blockages, as restricted airflow can contribute to overheating and affect the thermistor’s readings.

Replacing the thermistor should resolve the issue and restore normal functionality to the dryer. The thermistor you need for your model dryer is linked below.

Order Thermistor