Error code reference
Trane Furnace Error Code Green OFF / Red Flashing
Ignition control module locked out on failure to establish flame signal.
Ignition control module locked out on failure to establish flame signal.
First step from the service manual
Reset by cycling power at equipment disconnect, or by turning zone sensor/thermostat OFF and ON. Module will auto-reset after approximately one hour.
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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