Written by
Marcus Lindqvist Appliance Care EditorPublished October 26, 2026
VERIFIED
Error coderT
ApplianceRefrigerator
The sensor that reads the temperature of the room has gone wrong, and rT is the result. LG describes it as shortened or open, and the refrigerator performs less well while it lasts. Service is what the manual requests.
On LED-only panels
An external sensor error is shown by LEDs at -17°C, -20°C and -23°C. For an accurate diagnosis LG asks for a professional inspection, in which a technician examines the connection for a short circuit or a break.
Do not confuse it with
A very cold room is only the warning Lo. Zone sensors inside the cabinet report as rS for the upper refrigerator zone and r2 for the lower one.
San Francisco service for LG refrigerators
Ring (415) 223-7887 about rT if you are in San Francisco or the Bay Area. Say whether the code stays constant, and keep the model number ready. Find more under LG refrigerator repair.
Model compatibility: LG reuses codes across series and model years, so rT may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The ambient temperature sensor is faulty, described as a shortened or open room temperature sensor.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your LG appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your LG appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
