7 FLASHES
Gibson
Flame Loss During Run
Status LED flashes seven times, furnace attempts ignition but shuts down quickly
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Dirty burners causing unstable flame, Low or fluctuating gas pressure, Faulty gas valve coil on Gibson gas valve assembly, Flame sensor losing signal due to poor grounding
How to Fix / Troubleshooting
Safety first: Turn off power and gas. Gas adjustments and pressure checks should be done only by licensed technicians.
Steps to check:
- Inspect burners: Remove the burner assembly if accessible. Look for rust, debris, or spider webs in the burner ports. Clean with a soft brush and compressed air. Do not enlarge burner openings.
- Check ground connections: Ensure the furnace cabinet is properly grounded and that burner rack and control board ground wires are tight and free of corrosion.
- Observe flame: Restore power and call for heat. Through the sight glass, check that the flame is steady and blue, not lifting or blowing off the burners.
- If flame drops out repeatedly: A technician should check gas pressure, gas valve operation, and flame signal microamps to determine if the gas valve or flame sensor circuit is failing.
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Repair Difficulty
Hard
4/5
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