LG Refrigerator Error Code rr

The rr code on an LG refrigerator signals a fault in the R/Room temperature sensor circuit. The control board has detected either a short circuit (0 ohms) or an open circuit (infinite resistance) in the sensor measuring the fresh food compartment temperature. This prevents the refrigerator from accurately monitoring and regulating its internal temperature. The issue may involve the sensor itself, its connector, or the wiring between the sensor and the control board.

Continuing to use the refrigerator with an active rr error is not recommended, especially for perishable food. Because the control board cannot read the compartment temperature accurately, the fridge may not maintain safe food storage temperatures. It is best to address the fault promptly and temporarily transfer food to another cold storage option if the cooling performance seems compromised.

A power reset, such as unplugging the refrigerator for a few minutes and plugging it back in, may temporarily clear the rr code, but the error will return if the underlying sensor or wiring fault has not been corrected. The control board will re-detect the open or short circuit on the next diagnostic cycle. A permanent resolution requires identifying and repairing or replacing the faulty component.

Yes, some causes of the rr code are DIY-friendly. Start by checking that the sensor connector is fully plugged in and free of corrosion, as a loose connector is a common and easy fix. If the connector is secure, use a multimeter to measure resistance across the sensor terminals. A reading of 0 ohms or infinite resistance confirms the sensor or wiring needs replacement, which a confident DIYer can handle with basic tools.

If only the R/Room thermistor needs replacement, parts typically cost in the range of $15 to $60 depending on the specific model. If a professional technician is needed for diagnosis and replacement, total repair costs including labor generally fall in the range of $100 to $250. A control board replacement, if required, is the most expensive scenario and can range from $200 to $500 or more with labor included.