Error code reference
Trane Furnace Error Code Green OFF / Red Continuous
Internal fault detected on Texas Instruments ignition control module (can occur at any time).
Internal fault detected on Texas Instruments ignition control module (can occur at any time).
First step from the service manual
Replace ignition control module.
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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