Trane Error Code FAST-FLASH: Active Call for Heat
Warning: Your Trane heating system is calling for heat but not receiving a response. This could lead to system lockout and comfort issues.
How to Fix Trane Code FAST-FLASH
- Check your thermostat settings to ensure it's set to 'Heat' and the temperature is set higher than the current room temperature.
- If you have a gas furnace, ensure the pilot light is lit (if applicable) and the gas supply is turned on.
- If the issue persists, try turning off your system at the thermostat and the main power switch, then wait 30 seconds before turning it back on. If the issue is still not resolved, it's time to call a professional.
How to Reset Trane Code FAST-FLASH
- 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 FAST-FLASH mean?
The FAST-FLASH error on your Trane HVAC system indicates an active call for heat. This means your thermostat is set to heat mode, but the system isn't responding. This could be due to a few reasons, but it's important to address it promptly to prevent system lockout and ensure your comfort.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Gas Valve | Trane 2F73-0006 | — |
| Igniter | Trane 2F73-0005 | — |
| Flame Sensor | Trane 2F73-0007 | — |
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 |
| 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 |
| 8 | Low Flame Signal | Warning |