System Diagnosis
Flame sensed with gas valve off (unexpected flame). This could indicate a gas valve leaking or stuck open, or a control board issue.
American Standard | Furnaces
Error Code 5 Flashes
Troubleshooting guide for the American Standard Furnaces system fault 5 Flashes.
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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.
Potential Causes & Solutions
- Turn off the furnace.
- Do not continue operation until inspected.
- Check that the gas valve closes fully.
- This fault requires a qualified HVAC technician to examine the gas valve and control board.
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