LG Refrigerator Error Code Outer sensor open/short

This error means the ambient temperature sensor, which monitors the air temperature around the outside of the refrigerator, is sending an impossible reading below -50°C or above +50°C. The control board interprets this as either an open circuit (broken connection) or a short circuit in the sensor or its wiring. The refrigerator detects this fault to prevent incorrect temperature control decisions. The sensor or its wiring harness typically needs to be tested and replaced to resolve the error.

Operating the refrigerator with this error active is not recommended for extended periods. Without a functioning ambient sensor, the control board may not manage temperatures correctly, which could affect food safety. If the fridge is still cooling and temperatures inside remain stable, short-term use may be acceptable while you arrange repair, but the error should be resolved promptly.

A power reset may temporarily clear the error code, but it will return quickly if the underlying sensor or wiring fault has not been corrected. The control board will re-detect the out-of-range reading as soon as it resumes monitoring the sensor. A reset is useful for confirming whether a fault is intermittent, but it is not a repair solution. The sensor and wiring must be tested and corrected for the error to stay cleared.

A knowledgeable DIYer can attempt this repair by first inspecting the sensor wiring and connector for visible damage, corrosion, or loose connections. If the wiring looks intact, use a multimeter to measure the sensor's resistance and compare it to expected values at room temperature. If the sensor reads zero ohms or infinite resistance, replacing it is the correct fix. If you are not comfortable working with electrical components and wiring harnesses, a qualified technician should perform the repair.

If only the ambient temperature sensor needs replacement, parts typically cost in the range of $15 to $50 depending on the model. If a technician performs the diagnosis and repair, total costs including labor usually fall in the range of $100 to $250. Wiring harness repairs or control board replacement would increase costs beyond that range.