What does the LG Refrigerator error code RT mean?
Q: What does the LG refrigerator error code RT mean?
A: On many LG refrigerators, RT usually indicates a shorted or open room temperature sensor. This is generally a sensor-circuit problem rather than a basic control-setting issue.
What this code usually means
The room temperature sensor helps the refrigerator interpret surrounding conditions and adjust operation. If that sensor circuit is open or shorted, the unit may display RT and may need service.
Because this is a sensor-related code, resets may not permanently clear it.
What you may notice
- The code stays on the display
- Cooling behavior may seem inconsistent
- The refrigerator may overcool or undercool in some cases
- The code may return after a reset
- The unit may still appear to run at first
Safety first
Unplug the refrigerator before checking anything electrical. Avoid probing sensor circuits yourself.
Quick checks you can try
- Unplug the refrigerator for 2 minutes, then restore power
- Confirm the doors are closing properly
- Make sure internal vents are not blocked
- Watch whether the code returns right away
- Monitor temperatures if the refrigerator still seems to run
Common causes, likely parts
- Room temperature sensor fault — official interpretation
- Sensor wiring issue — possible
- Main control issue — possible in some models
- Loose sensor connection — possible
- Not usually a simple user-setting problem
When to call Beacon
If RT returns after a reset, our friendly technicians in yellow can inspect the room-temperature sensor circuit and related controls to determine what is causing the fault.
Request service or call (352) 726-7530. You can also visit www.BeaconSaves.com.
Content Update & Editorial Review
This article was reviewed and updated on March 7, 2026 by Chris for accuracy, clarity, and homeowner safety.
Frequently asked questions
What does RT mean on an LG refrigerator?
It usually indicates a shorted or open room temperature sensor.
Can I reset RT on my LG refrigerator?
You can try a brief power reset, but if the code returns, the sensor-related issue usually still needs diagnosis.
Will RT stop cooling?
It can affect normal control behavior and may lead to inconsistent cooling.
Is RT a bad board or bad sensor?
It is commonly treated as a sensor-circuit fault first, though wiring and control issues can also be involved.
Can blocked vents cause RT?
Blocked vents are not usually the direct cause, but good airflow inside the refrigerator still matters.
When should I call Beacon for RT?
Call if RT returns after a reset or the refrigerator is no longer holding temperature normally.