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Carrier Error Codes & Troubleshooting
Carrier Error Codes & Troubleshooting
Carrier air conditioning systems deliver premium comfort with innovative technology and reliability.
Error Code: E0
Communication error
Troubleshooting Steps:
Communication fault between indoor and outdoor units. Check connections.
Error Code: E1
Indoor temperature sensor
Error Code: E2
Outdoor temperature sensor
Error Code: E3
Indoor coil sensor
Troubleshooting Steps:
Indoor heat exchanger sensor fault. Professional diagnosis required.
Error Code: E4
Outdoor coil sensor
Error Code: E5
High pressure protection
Troubleshooting Steps:
High pressure switch activated. Check system pressures.
Error Code: E6
Low pressure protection
Troubleshooting Steps:
Low pressure protection activated. Check refrigerant levels.
Error Code: E7
Compressor protection
Troubleshooting Steps:
Compressor protection activated. Professional attention required.
Error Code: E8
Fan motor error
Troubleshooting Steps:
Fan motor malfunction. Check motor operation and obstructions.
Error Code: E9
Power supply error
Error Code: E10
Discharge temperature sensor
Error Code: E11
Suction temperature sensor
Error Code: E12
Liquid line temperature sensor
Error Code: E13
Inverter PCB error
Troubleshooting Steps:
Inverter control board malfunction. Professional replacement required.
Error Code: E14
Indoor PCB error
Troubleshooting Steps:
Indoor unit control board fault. Professional diagnosis needed.
Error Code: E15
Outdoor PCB error
Troubleshooting Steps:
Outdoor unit control board malfunction. Professional replacement required.
Error Code: E16
Compressor overcurrent
Troubleshooting Steps:
Compressor drawing excessive current. Professional diagnosis required.
Error Code: E17
Compressor locked rotor
Troubleshooting Steps:
Compressor motor locked. Immediate professional attention required.
Error Code: E18
Indoor fan motor error
Troubleshooting Steps:
Indoor fan motor malfunction. Check motor and remove obstructions.
Error Code: E19
Outdoor fan motor error
Troubleshooting Steps:
Outdoor fan motor fault. Check motor operation and obstructions.
Error Code: E20
EEV malfunction
Troubleshooting Steps:
Electronic expansion valve error. Professional diagnosis required.
Error Code: E21
Freeze protection
Troubleshooting Steps:
Indoor coil freeze protection. Check airflow and refrigerant levels.
Error Code: E22
Defrost sensor error
Error Code: E23
Current sensor error
Troubleshooting Steps:
Current sensing circuit malfunction. Check electrical connections.
Error Code: E24
Inverter overload
Troubleshooting Steps:
Inverter overload protection. Check electrical load and connections.
Error Code: E25
DC voltage error
Troubleshooting Steps:
DC bus voltage abnormality. Check power supply and inverter.
Error Code: E26
Heat sink temperature error
Troubleshooting Steps:
Heat sink overheating. Check cooling and ventilation.
Error Code: E27
Drain pump error
Troubleshooting Steps:
Drain pump malfunction. Check pump operation and drainage system.
Error Code: E28
Float switch activated
Error Code: E29
4-way valve error
Troubleshooting Steps:
Reversing valve malfunction. Check valve operation.
Error Code: E30
Filter sign
Error Code: E31
Remote controller error
Error Code: E32
Address setting error
Error Code: E33
Refrigerant shortage
Troubleshooting Steps:
Low refrigerant detected. Check for leaks and recharge system.
Error Code: E34
Oil return operation
Error Code: E35
Capacity mismatch
Troubleshooting Steps:
Indoor and outdoor unit capacity mismatch. Check system configuration.
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