Heil furnace LED flashes 10 times; furnace may lock out after repeated ignition attempts.
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
Critical safety: Work on gas valves should be done by qualified personnel. Do not attempt to disassemble the gas valve.
Steps to check (homeowner level):
- Verify gas supply: Ensure the manual gas shutoff valve is open and other gas appliances operate normally.
- Inspect wiring: With power off, check the plug-in connector to the gas valve on the Heil furnace. Make sure it is fully seated and wires are not damaged.
- Observe ignition: Restore power and call for heat. Confirm that the inducer runs, ignitor glows, and then listen for a click at the gas valve. If there is no click and no gas flow, the valve or board may be faulty.
- Do not adjust gas pressure: Do not turn any screws on the gas valve. Gas pressure and combustion must be set with proper instruments.
When to call a pro: If the gas valve is not opening or if you suspect low gas pressure, contact a licensed HVAC technician to test gas pressure, verify valve operation, and replace the gas valve or control board as needed.