What It Means
Ignition failure after retries, causing the furnace to lock out.
American Standard Furnace
American Standard Furnace Error Code 2 Flashes
Troubleshooting guide for the American Standard Furnace system fault 2 Flashes.
ACLogics Fix American Standard code 2 Flashes See how ACLogics handles it → Fix 2 Flashes step-by-step
Possible Causes
- Gas supply turned off or restricted.
- Dirty or oxidized flame sensor.
- Faulty or cracked igniter.
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
Ignition failure (burner failed after retries). The furnace may lock out for safety, blowing only cold air.
All Recorded Causes
Ensure the gas supply is turned on. Clean the flame sensor and verify the igniter is functional. After servicing, you may reset the furnace to clear the lockout.
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 ensure the gas supply is turned on.
- Verify each safety device and prove where the sequence stops under live operation, including whether clean the flame sensor and verify the igniter is functional.
- 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.
