Trane Error Code 2: System Lockout

LED Blink Pattern

How to Fix Trane Code 2

1. Check if the outdoor unit's fan is running. If not, try resetting the system at the indoor unit's control panel.
2. Look for any visible issues, such as ice buildup or water leaks, around the outdoor unit.
3. If the system doesn't reset or you notice any issues, call a professional HVAC technician.

How to Reset Trane Code 2

1. Turn off the furnace power switch, usually located on or near the unit.
2. Turn off the circuit breaker for the furnace. Wait 30 seconds.
3. Restore power at the breaker and flip the furnace switch back on.
4. Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Trane Error Code 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.

Common Causes

• Faulty outdoor fan motor or fan relay
• Tripped safety switch due to high pressure or overtemperature
• Communication error between the indoor and outdoor units

Diagnostic Steps

Replacement Parts

Related Codes on Same Models

Other codes that affect the same Trane model families as 2.