Whirlpool dryer — Error Code F22
The primary control unit has identified an open or shorted condition within the exhaust temperature thermistor.
What it means
The F22 error on a Whirlpool dryer signifies a failure related to the exhaust temperature thermistor, either through hardware damage or a signal interruption. The main electronic control board relies on this sensor to track resistance levels, which allows it to manage drum heat and prevent dangerous temperature spikes. Under standard room conditions (roughly 77°F), a functional Whirlpool exhaust thermistor should display a resistance of near 10,000 ohms (10kΩ). If the control board detects an open circuit (exceeding 50kΩ) or a short circuit (falling below 500Ω), it will immediately cut the heating cycle and display the F22 code to avoid thermal runaway. Because this is a hard fault, the dryer will block heating functions until the resistance readings return to the required operational parameters.
Likely Causes
- 1 Failed Exhaust ThermistorThe internal sensing component has suffered degradation or a complete break, resulting in an open circuit. This remains the most frequent reason for an F22 appearance.
- 2 Wiring Harness IssuesPhysical damage, such as a loose plug, pinched wire, or corrosion at the thermistor connection or control board terminal, is preventing the signal from reaching the controller.
- 3 Main Control Board FaultIn rare instances, a compromised relay or burnt circuit trace on the main control board prevents it from accurately measuring the thermistor, even when the sensor is functional.
How to clear / reset
To attempt a temporary reset of the F22 code, perform a hard power cycle. Disconnect the dryer from the wall or switch the dedicated dual-pole circuit breaker to the OFF position for 5 to 10 minutes. Once you restore power, try running a timed dry cycle without heat. If the code disappears, it may have been triggered by a transient voltage surge. However, since F22 represents a hard component failure, the error will almost certainly reappear once the control board checks the thermistor again. The only way to permanently resolve this is to replace the damaged thermistor or repair any compromised wiring.
Common replacement parts
When to call a pro
Reach out to a professional if you do not have a digital multimeter to measure thermistor resistance, or if changing the thermistor fails to resolve the F22 code. Diagnosing a faulty main control board or tracing continuity through the dryer's wiring harness requires specialized electrical knowledge and the ability to interpret technical schematics. A-Fix Service provides a $90 diagnostic fee (waived if you proceed with our repair) and includes a 1-year parts and labor warranty on all work. We stock OEM Whirlpool thermistors and control boards on our service vehicles to ensure your PNW home gets back to laundry day in a single visit.
FAQs
What is the typical cost to resolve an F22 error?
Replacing a standard thermistor generally costs between $120 and $180, covering both the part and the labor. If the main control board requires replacement, costs typically run from $250 to $450.
Is this a repair I can handle myself?
Yes, provided you have basic hand tools and a multimeter. You can locate the thermistor by removing the rear or lower front panel—depending on your specific model—and testing for roughly 10k ohms at room temperature.
Will the F22 code clear on its own?
No. You must perform a hard reset, and if the thermistor is genuinely failed, the code will trigger again the moment a new cycle starts.
How long does a professional repair usually take?
A typical thermistor replacement is handled by our technicians in about 30 to 45 minutes, covering the full diagnostic, installation, and final testing.
Can I continue using my dryer with an F22 code active?
The dryer's control system will prevent any heated cycles while this code is present. Never attempt to bypass the thermistor, as this creates a severe fire risk.
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