Whirlpool Dryer Error Code F-20

F-20 on a Whirlpool electric dryer indicates a Heater #1 failure, meaning the control board has detected a fault in the primary heating element circuit. This code only appears on electric models. The dryer may still run but will not produce heat until the issue is resolved. Diagnosis involves testing the heater circuit components including the element, thermal fuse, and high-limit thermostat.

You should not continue using the dryer to dry clothes while the F-20 code is active. Although the dryer drum may still tumble, the heating system is not functioning correctly. Continuing to run the dryer without addressing the underlying fault could worsen the problem or indicate an unresolved overheating condition.

Resetting the dryer by unplugging it for a few minutes may temporarily clear the F-20 code, but if a component in the heater circuit has actually failed, the code will return as soon as the dryer attempts to heat again. A proper repair requires diagnosing and replacing the faulty component rather than relying on a reset.

A knowledgeable DIYer can diagnose and repair an F-20 code by testing the heating element, thermal fuse, and high-limit thermostat for continuity using a multimeter. Replacement parts for these components are widely available. However, working on electric dryer heating circuits involves exposure to high-voltage components, so the dryer must be fully unplugged before any testing or repair work begins.

Repair costs vary depending on which component has failed. A replacement heating element typically costs between $20 and $60 for the part, while a thermal fuse or high-limit thermostat is usually in the $5 to $25 range. If you hire a technician, expect to add $75 to $150 or more for labor depending on your area.