Carrier Central Air Conditioners & Furnaces

20 known error codes

11 Easy Fix

No Previous Error Code

12 Easy Fix

Blower On After Power-Up

13 Moderate

Limit Circuit Lockout

14 Moderate

Ignition Lockout

21 Moderate

Gas Heating Lockout

22 Moderate

Abnormal Flame Proving Signal

23 Easy Fix

Pressure Switch Did Not Close

24 Moderate

Secondary Voltage Fuse Blown

31 Moderate

Pressure Switch Stuck Closed

32 Moderate

Limit Circuit Fault

33 Moderate

Limit Circuit Lockout

34 Easy Fix

Ignition Proving Failure

41 Moderate

Blower Motor Fault

42 Moderate

Inducer Motor Fault

43 Moderate

Pressure Switch Calibration Fault

44 Moderate

Blower RPM Below Set Speed

45 Moderate

Control Circuitry Lockout

E1 Moderate

Low Refrigerant / Low Pressure Fault

E2 Moderate

Indoor Coil Freeze Protection

E4 Moderate

High Pressure Cutout