The furnace does not respond to the thermostat; the status LED shows 7 repeating flashes; there is no inducer or blower operation.

Safety: Turn off power and gas before working inside the furnace. If you smell gas, do not attempt to relight it; contact the gas utility or a technician.

Steps to reset and check:

• Power cycle the furnace: Turn off the furnace service switch or breaker for 30 seconds, then restore power. This clears a soft lockout on many Luxaire control boards.
• Observe ignition sequence: With the burner door in place and a call for heat, watch through the sight glass. Confirm that the inducer starts, the ignitor glows, the gas valve clicks, and the burners light. Note at which step the sequence fails.
• Inspect ignitor and flame sensor: Remove and visually inspect the hot surface ignitor for cracks and the flame sensor for heavy oxidation. Replace or clean them as needed.
• Check wiring harnesses: Ensure all multi-pin connectors on the control board are fully seated and free of corrosion.

When to call a pro: If the furnace repeatedly enters lockout (7 flashes) after basic checks, a technician should test the gas valve operation, ignition timing, and may need to replace the control board or gas valve with Luxaire-approved parts.