LG Refrigerator Error Code Er 10

Er 10 on an LG refrigerator indicates a short circuit detected in the water tank sensor circuit. The water tank sensor is a thermistor that monitors the temperature of the internal water supply used by the dispenser. The control board triggers this code when it reads an abnormally low resistance signal from the sensor, which is consistent with a short circuit condition.

Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the display, but Er 10 will return if the underlying short circuit in the water tank sensor or its wiring has not been corrected. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.

If only the water tank sensor needs replacement, parts typically range from $15 to $50, and the repair is relatively straightforward for someone comfortable working with appliances. If the wiring harness requires repair or the control board is involved, labor and parts costs can range from $100 to $300 or more depending on the extent of the damage and local service rates.

Start by unplugging the refrigerator and locating the water tank sensor connector. Use a multimeter to measure the resistance across the sensor terminals. If the reading is near zero ohms, the sensor has shorted and needs to be replaced. Also inspect the wiring harness for any visible damage or pinching that could be causing the conductors to short together.

The Er 10 error primarily affects the water dispenser system and its temperature monitoring. The refrigerator and freezer compartments will generally continue to cool food, but the water dispensing function may be impaired or disabled. It is best to address the fault promptly to avoid any further issues with the dispenser system.