Error code reference
Trane Furnace Error Code Green OFF / Red Flashing (during ignition try)
No flame signal on try for ignition or flame signal lost during ignition try.
No flame signal on try for ignition or flame signal lost during ignition try.
First step from the service manual
At the start of each retry for ignition, the Red LED will flash for 5 seconds along with a flashing Green LED. Module will attempt three trials for ignition before lockout.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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Get the full diagnostic procedure for Green OFF / Red Flashing (during ignition try).
- 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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