LG Washer Error Code Ball Pressure Sensor Error

This error means the washer's control board has lost communication with the ball pressure sensor, which is the component responsible for monitoring water level inside the drum. When this fault occurs, all water level LEDs on the control panel blink at the same time. The cause is either a disconnected BL 3-pin connector between the sensor and the main board, or a sensor that is no longer operating within its required frequency range of 63 to 70 Hz.

It is not recommended to continue running the washer while this error is active. The ball pressure sensor controls water level detection, and without reliable feedback from this sensor, the machine may not fill or drain correctly. Running cycles in this condition could lead to overfilling or incomplete washes. Resolve the error before resuming normal use.

If only the connector needs to be reseated or cleaned, the repair may cost nothing beyond your time. If the ball pressure sensor itself needs to be replaced, parts costs typically range from around $20 to $60 depending on the model, with professional labor adding roughly $80 to $150 on top of that. Diagnosing the connector first before purchasing parts can help avoid unnecessary expenses.

Start by locating the BL 3-pin connector that runs between the ball pressure sensor and the PWB ASM, then check it for loose, corroded, or bent pins and reseat it firmly. If the connection looks good, enter QC TEST MODE and check the sensor's output frequency. If the reading is below 63 Hz or above 70 Hz, the sensor needs to be replaced. Fixing the connector alone resolves the error in many cases without requiring any new parts.

A basic power reset may temporarily clear the error display, but the fault will return if the underlying cause has not been corrected. The error is tied to an actual sensor communication failure, not a software glitch. The BL connector must be inspected and the sensor frequency confirmed to be within the 63 to 70 Hz range before the error will stay cleared.