Status LED flashes green five times repeatedly; furnace may start but lock out after several failed 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
Safety first: Turn off power and gas before working on burners or ignitor.
Steps to check:
- Inspect and test ignitor: Remove the hot surface ignitor and visually inspect for cracks. Measure resistance with a multimeter; compare to Coleman specifications (often 40–90 ohms depending on style). Replace if out of range.
- Clean burners: Remove the burner rack and brush off rust and debris. Ensure burner ports and crossover channels are clear so flame can travel quickly from burner to burner.
- Clean flame sensor: Polish the flame sensor rod with fine steel wool and reinstall.
- Gas pressure check: A technician should measure inlet and manifold gas pressure with a manometer and adjust at the gas valve if needed.
After cleaning and replacing worn parts, reset the furnace by cycling power. If lockouts continue, the gas valve or control board may require replacement.
Repair Difficulty
Required Part
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