7 FLASH
Tappan
Ignition Lockout Due to Repeated Failures
Furnace locks out after several failed ignition attempts; LED flashes 7 times repeatedly; system may require power reset to retry.
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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
Contaminated burners, improper flame carryover between burners, weak hot surface ignitor, incorrect line voltage to Tappan control board
How to Fix / Troubleshooting
Safety: Turn off power and gas before servicing burners.
Steps:
- Remove the burner assembly following the Tappan service manual (disconnect gas manifold, ignitor, and flame sensor wiring as needed).
- Clean each burner with a soft brush and compressed air. Ensure the crossover ports between burners are clear so flame can travel from the ignited burner to the others.
- Inspect the hot surface ignitor for proper positioning relative to the burner. Adjust mounting if necessary so the ignitor is fully in the gas stream.
- Check line voltage at the furnace (L1 to neutral) to ensure it is within 110–125 VAC. Low voltage can cause weak ignition.
- Reassemble, restore gas and power, and reset the control by turning power off for 30 seconds. Observe a full ignition sequence. If lockout returns, the control board or gas valve may require replacement by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Burner Assembly
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