Trane HVAC Systems (AC, Furnaces & Heat Pumps)

20 known error codes

1 blink Moderate

System Lockout - Retries Exceeded

10 blinks Easy Fix

Line Voltage Polarity Reversed

2 blinks Easy Fix

Pressure Switch Stuck Open

3 blinks Easy Fix

Pressure Switch Stuck Closed

4 blinks Moderate

Open High Temperature Limit Switch

5 blinks Moderate

Flame Sensed Without Gas Valve Call

6 blinks Moderate

Ignition Failure / Lockout

7 blinks Moderate

Gas Valve Circuit Fault

8 blinks Easy Fix

Low Flame Current

9 blinks Moderate

Check Polarity / Grounding Issue

AL Moderate

General Alarm Condition

E1 Moderate

Low Pressure Fault

E2 Moderate

High Pressure Fault

E3 Moderate

Compressor Overcurrent Protection

E4 Moderate

Sensor Fault

E5 Moderate

Communication Error

HP Moderate

High Pressure Lockout

LP Moderate

Low Pressure Lockout

rapid flash Moderate

Flame Detected Without Call for Heat

slow flash Easy Fix

Normal Operation - No Call for Heat