Trane Error Code 8: Low Flame Signal
Warning: Your Trane HVAC system has detected a low flame signal, which could lead to system failure or safety issues. Turn off the system and call a professional for repair.
How to Fix Trane Code 8
- Step 1: Turn off your Trane HVAC system at the thermostat and the main gas valve.
- Step 2: Do not attempt to open the unit or perform any repairs yourself. This could cause further damage or safety risks.
- Step 3: Contact a licensed Trane HVAC technician for a professional diagnosis and repair.
How to Reset Trane Code 8
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
What does 8 mean?
When your Trane HVAC system displays error code 8, it indicates a low flame signal in the burner assembly. This could be due to a faulty igniter, clogged flame sensor, or low gas pressure. The system is designed to protect itself and your safety by shutting down when it detects this issue. It's important not to ignore this error as it could lead to further damage or safety hazards.
Affected Models
Recall Notices
Trane/American Standard Gas-Electric Packaged Units Recalled Due to Fire Hazard
25-XXX
Fuel gas valve can open unexpectedly, creating gas leak and fire hazard. Stop using heating mode.
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Igniter | Trane 120-8160 | — |
| Flame sensor | Trane 120-8170 | — |
| Gas valve | Trane 120-8200 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| STEADY-ON | Control Board Problem | Warning |
| STEADY-OFF | No Power | Warning |
| SLOW-FLASH | Normal Operation (Standby) | Warning |
| FAST-FLASH | Active Call for Heat | Warning |
| 2 | System Lockout | Warning |
| 3 | Pressure Switch Error | Warning |
| 4 | Open Limit Switch | Warning |
| 5 | Flame Sensed With Gas Off | Warning |
| 6 | Polarity/Grounding Error | Warning |
| 7 | Gas Valve Circuit Error | Warning |