How to Fix / Troubleshooting

Safety first: Turn off power before handling the ignitor. The ignitor is fragile and can break easily.

Steps to check:

Inspect ignitor: Remove the burner access panel and locate the hot surface ignitor. Look for visible cracks or chips in the ceramic or element. If damaged, replace with the exact Gibson-specified ignitor type.
Check wiring: Verify the ignitor plug is fully seated in the harness and that wires are not burned or pinched.
Resistance test (for qualified persons): With power off and ignitor disconnected, measure resistance across the ignitor terminals. An open reading (infinite resistance) indicates a failed ignitor.
After replacement: Reinstall the new ignitor carefully, avoiding contact with the element. Restore power and test operation.
If code persists: The control board ignitor circuit may be defective and should be evaluated by a technician.

Status LED flashes eight times, furnace will not start heating cycle

Possible Causes