What does F22 mean?
Exhaust temperature sensor reading out of range.
Common causes
- Failed exhaust thermistor
- Loose connector
- Damaged wiring
- Thermistor not seated properly
Diagnostic & testing steps
- 1. Locate exhaust thermistor near exhaust vent
- 2. Check connector is seated
- 3. Measure resistance at room temp - ~10,000 ohms at 77F
- 4. Resistance should change smoothly with temperature
- 5. Check wiring between thermistor and control board
Tools required
- Multimeter
- 1/4 inch nut driver
OEM parts & part numbers
Exhaust Thermistor
Part numbers: W10834831, WPW10545255
Safety warning
⚠️ Disconnect power before testing
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