03
LG
LG air conditioner error 03
Meaning
Communication(Indoor ↔ Wired R/Control)
General meaning for the brand's models, unless a model's own manual says otherwise.
Causes and how to check
- 1 possible causes
- the cited manual page, and follow-up questions
No account needed to look up codes.
Guides
- Communication error between indoor and outdoor unit: what to check, in which order
Communication (transmission) error codes usually come from the connecting wire, the supply or a board. The checks from easy to hard.