Furnace runs inducer and ignitor but gas valve does not open; status LED shows 8 flashes repeating.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Gas components must be handled carefully. If you are not experienced, contact a licensed HVAC technician. Always shut off power and gas before touching gas piping.
Homeowner checks:
- Verify gas shutoff position: Locate the manual gas cock near the Luxaire furnace. Ensure the handle is parallel to the gas pipe (open). If perpendicular, it is closed.
- Check other gas appliances: Confirm that a gas stove or water heater operates normally. If none work, contact your gas utility.
- Inspect wiring: With power off, check that the 2-wire harness to the gas valve is firmly connected and not damaged.
Professional-only tasks: Measuring gas pressure, testing valve coil resistance, and replacing the gas valve must be done by a qualified technician using Luxaire-specified replacement valves and leak testing procedures.