York HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats)

17 known error codes

1 blink Moderate

System Lockout

2 blinks Moderate

Pressure Switch Open

3 blinks Easy Fix

Pressure Switch Stuck Closed

4 blinks Easy Fix

Open Limit Switch

5 blinks Moderate

Flame Sensed With No Call for Heat

6 blinks Moderate

Ignition Failure

7 blinks Moderate

Gas Valve Relay Fault

8 blinks Easy Fix

Low Flame Current

9 blinks Moderate

Grounding / Polarity Issue

E1 Moderate

System High Pressure Fault

E2 Moderate

System Low Pressure Fault

E3 Moderate

Compressor Overcurrent

E4 Moderate

Discharge Temperature Sensor Fault

E5 Easy Fix

Outdoor Ambient Temperature Sensor Fault

E6 Moderate

Indoor Coil Temperature Sensor Fault

E7 Moderate

Communication Error Between Indoor and Outdoor Units

E8 Moderate

Outdoor Fan Motor Error