What F22 Means
F22 means the exhaust thermistor circuit — the sensor that reads exhaust air temperature — is reading as an open circuit, so the control board can't trust its temperature data and stops the cycle.
Common Causes of F22
- Failed exhaust thermistor
- Damaged or disconnected thermistor wiring
- Control board misreading the sensor signal
🔧 One Safe Check You Can Try
Power-cycle the dryer at the breaker for a couple of minutes; if F22 returns on the next cycle attempt, that confirms a genuine sensor-circuit fault rather than a one-time glitch.
⚠ Why You Shouldn't Go Further Than That
- The thermistor sits inside the exhaust duct path near the heating element — reaching it typically means partial disassembly around a powered heat source.
- A thermistor swapped without confirming the wiring harness is intact first can leave the exact same code active after the part is replaced.
- Panel access to reach the exhaust thermistor can affect your remaining warranty coverage — check your terms first.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.