What It Means
Flame instability or abnormal burner flame sensed after ignition.
American Standard Furnace
American Standard Furnace Error Code 22 Flashes
Troubleshooting guide for the American Standard Furnace system fault 22 Flashes.
ACLogics Fix American Standard code 22 Flashes See how ACLogics handles it → Fix 22 Flashes step-by-step
Possible Causes
- Improper burner combustion or dirty burners.
- Inadequate gas pressure.
- Burner misalignment.
- Gas valve or heat exchanger issue.
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
Flame problem sensed after ignition (flame instability). This indicates the burner flame itself is abnormal or not sustaining properly.
All Recorded Causes
If burners are firing erratically, turn off the furnace. Possible causes are improper burner combustion, inadequate gas pressure, or burner misalignment. Cleaning the burners may help if they’re dirty. Have an HVAC technician inspect the flame pattern, gas valve, and heat exchanger to diagnose the root cause.
Verify Before Replacing Parts
- Confirm the exact American Standard 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 if burners are firing erratically, turn off the furnace.
- Verify each safety device and prove where the sequence stops under live operation, including whether possible causes are improper burner combustion, inadequate gas pressure, or burner misalig….
- 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 American Standard Furnace diagnostics step-by-step — so you confirm the cause before swapping parts.
