Furnace does not respond to thermostat; status LED shows 7 flashes repeating; 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; 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 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 inducer starts, ignitor glows, gas valve clicks, and 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 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 gas valve operation, ignition timing, and may need to replace the control board or gas valve with Luxaire-approved parts.