Whirlpool Dryer F-22 Error Code - Causes & Fix

Whirlpool Dryer F-22 Error Code — What It Means

The F-22 error code on a Whirlpool dryer indicates that the machine has detected an exhaust thermistor fault. The exhaust thermistor is a temperature sensor near the dryer’s exhaust outlet that monitors air temperature during the drying cycle. When the F-22 code appears, the thermistor’s resistance is outside the expected range, or the thermistor circuit or wiring is open or shorted. The control board cannot get a valid temperature reading, so it stops the cycle and displays the fault.

Whirlpool’s official product support recommends power-cycling the dryer first. If the code returns after a reset, the dryer needs service. In most cases the exhaust thermistor itself has failed, or the wiring and connectors between the thermistor and the control board are damaged, loose, corroded, or shorted.

Jump to Fix

Common Causes

• Failed exhaust thermistor The thermistor sensor has drifted out of specification or become intermittent and no longer delivers accurate resistance readings to the control.
• Loose or corroded wiring connections The connector terminals at the thermistor or control board are loose, oxidized, or burned, breaking the circuit or creating erratic readings.
• Open or shorted wire harness The wiring between the thermistor and the main control board is damaged, pinched, or has a short to ground.
• Abnormal temperature behavior from heater faults In some cases heater assembly issues or thermal limit devices may cause unusual temperature readings that flag the thermistor circuit, though they are not the direct cause of F-22.
• Defective control board If the thermistor and harness test good, the control board’s input relay or sensing circuitry may be misreading or falsely flagging the thermistor circuit.

Step-by-Step Fix

1. {‘lead’: ‘Disconnect all power to the dryer’, ‘text’: ‘Turn off the circuit breaker or unplug the dryer completely before any inspection or testing.’}
2. {‘lead’: ‘Reset the control by leaving power off for five minutes’, ‘text’: ‘After the waiting period, restore power and start a timed dry cycle to see if the F-22 code returns.’}
3. {‘lead’: ‘Inspect the exhaust thermistor and wiring near the exhaust outlet’, ‘text’: ‘Look for loose, broken, burned, or disconnected connector terminals at both the thermistor and the control board.’}
4. {‘lead’: ‘Measure thermistor resistance with a multimeter’, ‘text’: “Disconnect the thermistor plug, place your meter across the thermistor terminals, and compare the reading to your model’s service-manual resistance table.”}
5. {‘lead’: ‘Check harness continuity and test for shorts to ground’, ‘text’: ‘If the thermistor measures in spec, verify that every wire in the harness has continuity end-to-end and that no wire shows continuity to the dryer cabinet.’}
6. {‘lead’: ‘Replace the failed component’, ‘text’: ‘Install a new exhaust thermistor if it is out of range, repair or replace the harness if you found an open or short, or replace the control board if both thermistor and wiring test good.’}
7. {‘lead’: ‘Reassemble, restore power, and verify the repair’, ‘text’: ‘Run a complete timed dry cycle and confirm the dryer operates without the F-22 code reappearing.’}

Parts Often Needed

When to Call a Pro

Call a qualified appliance technician if you are not comfortable working with electrical diagnostics or if the code returns after you have power-cycled the dryer. Measuring thermistor resistance and tracing harness continuity requires a multimeter and familiarity with your model’s service data. If you replace the thermistor and inspect the wiring but the F-22 code still appears, the control board is likely faulty and should be diagnosed by a professional with access to the correct replacement and programming tools.