Trane Error Code 2: System Lockout
Warning: Your Trane HVAC system has locked out due to a safety issue. It won't operate until the problem is fixed.
How to Fix Trane Code 2
- Check if the outdoor unit's fan is running. If not, try resetting the system at the indoor unit's control panel.
- Look for any visible issues, such as ice buildup or water leaks, around the outdoor unit.
- If the system doesn't reset or you notice any issues, call a professional HVAC technician.
How to Reset Trane Code 2
- 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 2 mean?
Trane's system lockout error code 2 indicates a safety issue that has caused your HVAC system to shut down. This could be due to a problem with the outdoor unit's fan, a safety switch, or a communication issue between components. Don't attempt to open the unit or reset the system until you've identified and addressed the issue.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Outdoor Fan Motor | 12AA318-000 | — |
| Outdoor Fan Relay | 12AA319-000 | — |
| Safety Switch | 12AA320-000 | — |
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 |
| 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 |