LG Washer Error Code Er

The Er code on an LG washer indicates that the ambient temperature sensor has failed or is sending an unreadable signal to the control board. This error appears in the outside temperature display area of the LCD panel. The most common causes are a defective sensor, broken wiring near the hinge area, or a loose connector. The machine flags the error so the sensor circuit can be tested and repaired.

The Er code relates specifically to the ambient temperature sensor circuit and its display function. Depending on how critical that sensor input is to the washer's operating logic, the unit may continue to run certain cycles or may limit functionality. It is best to address the error promptly rather than continuing to operate the machine, as unresolved sensor faults can sometimes mask developing issues or affect cycle performance.

Repair costs vary depending on the root cause. If only the ambient temperature sensor needs replacement, parts typically range from around $15 to $60 depending on the specific model. A wiring harness repair or replacement may cost more in parts and labor. If a professional technician is needed for diagnosis and repair, total service costs including labor commonly range from $100 to $250 or more depending on your location and the extent of the repair needed.

A knowledgeable DIYer can perform the initial diagnostic steps by checking the sensor connector at the hinge area for looseness or corrosion and reseating it if needed. Testing sensor resistance with a multimeter requires some technical skill but is straightforward if you are comfortable using electrical test equipment. Replacing the sensor or wiring harness is also a manageable repair for someone with appliance repair experience. If the fault points to the control board, professional service is recommended.

A power reset by unplugging the washer for a few minutes may temporarily clear the code if the fault was caused by a transient signal issue or a briefly loose connector. However, if the underlying cause is a failed sensor, broken wire, or corroded connector, the Er code will return once the machine restarts and re-checks the sensor circuit. A reset alone is not a fix and the sensor circuit should be properly diagnosed.