LG Mini Split Error Code CH33: How to Fix It

Q: What does LG mini split error code CH33 mean?

CH33 indicates a problem with the compressor discharge temperature sensor, either an open circuit, short circuit, or sensor failure that prevents proper monitoring of compressor temperature.

Q: Can I reset the CH33 error code myself?

You can try resetting by turning off the unit and circuit breaker for 5 minutes, then restoring power. However, if the underlying sensor or wiring problem isn't fixed, the error will return.

Q: How much does it cost to fix LG mini split CH33 error?

Professional repair typically costs $150-400 depending on whether it's a sensor replacement ($100-200) or more complex wiring/compressor issues ($200-400+).

Q: Is it safe to run my LG mini split with CH33 error?

No, you should not run the unit with this error. The temperature sensor protects the compressor from overheating, and continued operation without proper monitoring could cause expensive compressor damage.

Q: How long do LG mini split temperature sensors last?

Temperature sensors typically last 8-12 years, but can fail earlier due to electrical surges, moisture intrusion, or normal wear and tear in harsh environmental conditions.

Abstract

Error code CH33 on your LG mini split indicates a problem with the compressor discharge temperature sensor, which monitors the temperature of refrigerant leaving the compressor. This sensor protects your system from overheating, and when it fails or has a wiring issue, your unit will shut down to prevent damage.