What It Means
Flame signal proved while gas valve is de-energized.
Carrier Furnace
Carrier Furnace Error Code 22
Troubleshooting guide for the Carrier Furnace system fault 22.
Possible Causes
- Flame sensor shorted or leaking to ground.
- Shorted flame sensor wire harness.
- Gas valve failing to close completely.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
Abnormal Flame-Proving Signal. Flame is proved while gas valve is de-energized.
All Recorded Causes
Inspect flame sensor for leakage to ground. Check for shorted flame sensor wire. Verify gas valve closes completely when de-energized. Replace flame sensor or gas valve if defective.
Verify Before Replacing Parts
- Confirm the exact Carrier model family and furnaces context before acting on a generic code description.
- Walk the entire heating sequence in order instead of jumping straight to the reported code, watching for inspect flame sensor for leakage to ground.
- Verify each safety device and prove where the sequence stops under live operation, including whether check for shorted flame sensor wire.
- After the correction, run the system long enough to confirm the furnaces fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Carrier Furnace diagnostics step-by-step — so you confirm the cause before swapping parts.
