CH53E0On LG air conditioners, error code CH05 means: Communication error between indoor and outdoor units. Switch the unit off and try a power reset. If the code comes back, have it checked by a technician before using it again.
Can I keep using the air conditioner?
Switch the unit off and try a power reset. If the code comes back, have it checked by a technician before using it again.
Common causes
- Installation fault: wiring, unit combination or pipework
- Damaged wiring or a loose/corroded connector
- Unstable mains power or a loose plug/socket
- Faulty control or motor board
How to fix it
- Switch the unit off at the breaker for about 5 minutes, then switch it back on
- If it appeared right after installation, ask your installer to check the wiring and setup
- If the code returns, contact an authorised AC technician; don't open the unit yourself
Frequently asked questions
What does LG error CH05 mean?
On LG air conditioners, error code CH05 means: Communication error between indoor and outdoor units.
How do I fix LG error CH05?
Start with these steps: Switch the unit off at the breaker for about 5 minutes, then switch it back on; If it appeared right after installation, ask your installer to check the wiring and setup; If the code returns, contact an authorised AC technician; don't open the unit yourself.
Can I keep using the air conditioner with error CH05?
Severity: Medium. Switch the unit off and try a power reset. If the code comes back, have it checked by a technician before using it again.