Carrier HVAC Error Code 55: How to Fix It

Q: Can I bypass the suction line sensor to clear error code 55?

No, bypassing the sensor is not recommended and can cause system damage or safety hazards. The sensor is critical for proper operation and safety.

Q: Will error code 55 prevent my Carrier HVAC from running?

Yes, the system may lock out to protect the compressor and other components. The error must be resolved before normal operation resumes.

Q: How much does a suction line sensor replacement cost?

A replacement sensor typically costs $20–$50. Professional labor may add $100–$200 if you hire a technician.

Q: Is error code 55 the same on all Carrier models?

Error code 55 generally indicates a suction line sensor fault across most Carrier HVAC systems, but always refer to your specific model's manual for confirmation.

Q: Can a dirty filter cause error code 55?

No, a dirty filter does not directly cause this error. It is specifically related to the suction line temperature sensor circuit.

Abstract

Carrier HVAC error code 55 means the system has detected a fault with the suction line temperature sensor. This sensor monitors refrigerant temperature and helps regulate system operation. A fault can cause improper cooling or heating and may prevent the unit from running.