Error code reference
Ingersoll Rand Furnace Error Code E6.3
Igniter relay fails (stuck closed) or igniter circuit is open/shorted.
Igniter relay fails (stuck closed) or igniter circuit is open/shorted.
First step from the service manual
Make a call for 1st stage heating and check if igniter glows; if not, measure 120 VAC between IGN-H and IGN-N on IFC.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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