LG Mini Split Error Code CH45: How to Fix It

Q: What causes LG mini split error code CH45?

CH45 is triggered by a faulty outdoor heat exchanger pipe temperature sensor, which can be caused by sensor failure, damaged wiring, loose connections, or debris buildup affecting sensor operation.

Q: Can I still use my LG mini split with CH45 error?

The system may continue to operate with reduced efficiency or may shut down completely. It's recommended to fix the error promptly to prevent damage to other components and ensure proper heating/cooling performance.

Q: How much does it cost to replace the temperature sensor?

A replacement outdoor temperature sensor typically costs $20-50 for the part. Professional installation can add $100-200 in labor costs, making DIY repair cost-effective for those comfortable with basic electrical work.

Q: How do I reset my LG mini split after fixing CH45?

After completing repairs, turn the system off and on at the circuit breaker, then use your remote control to clear error codes. Some models require holding specific button combinations - consult your owner's manual for the exact reset procedure.

Q: Will CH45 error damage my mini split system?

While CH45 won't immediately damage the system, ignoring it can lead to inefficient operation, increased energy costs, and potential damage to the compressor or other components due to improper temperature monitoring.

Abstract

LG mini split error code CH45 indicates a malfunction with the outdoor heat exchanger pipe temperature sensor. This sensor monitors refrigerant temperatures to ensure efficient operation, and when it fails, your system may stop heating or cooling properly.