LG Refrigerator — Error Code RT
The ambient room-temperature sensor is open or shorted.
ApplianceDB ranks 1 repair for this code, led by “Request professional service”. That top fix is professional-only work, not a DIY job, involving the ambient sensor. Severity is classified as degraded — the appliance keeps running but not correctly.
Ranked repair steps
1. Request professional service
LG publishes no user troubleshooting for the room-temperature sensor fault; request repair service.
professional only · basis: manufacturer first
Provenance: facts re-derived from an official manufacturer listing — LG USA Support — Refrigerator Error Code List. Meanings and steps are original paraphrase; nothing is reproduced verbatim.