LG Washer Error Code 4

Error code 4 on an LG washer means the machine has detected an overflow condition, where the water level frequency reading from the pressure sensor has exceeded 213. The washer interprets this as too much water in the drum and automatically runs the drain pump to remove the excess. The most common causes are a malfunctioning pressure sensor or a water inlet valve that is not closing properly.

No, you should not continue using the washer until the issue is resolved. The overflow error means the machine detected or risked a water level that could lead to flooding or water damage. The washer automatically stops the cycle and drains as a safety precaution, so it is best to leave it in that state until the root cause is diagnosed and repaired.

Repair costs depend on which component has failed. A replacement water inlet valve typically costs between 25 and 75 dollars for the part, while a pressure sensor generally falls in the 15 to 50 dollar range. Adding professional labor, total repair costs commonly range from 100 to 250 dollars depending on your location and the technician's rates. If the control board is the cause, costs can be higher.

Start by inspecting the pressure sensor and its connecting hose for damage, kinks, or blockages. Next, check the water inlet valve to see if it is allowing water to enter the drum when it should not be. If the hose and sensor appear physically intact, testing the pressure sensor with a multimeter or running a diagnostic cycle can help pinpoint whether the sensor or the inlet valve needs to be replaced.

A reset may temporarily clear the error code, but if the underlying cause has not been fixed, the error will return once the machine attempts to fill with water again. A defective water inlet valve or faulty pressure sensor must be addressed directly. Relying on resets without repairing the source of the problem can lead to repeated overflow events and potential water damage.