LG Washer Error Code bS

The bS code on an LG washer stands for ball sensor error. It indicates that the control system detected either a loose connector at the ball sensor or a ball sensor that has failed. This code only appears when the START/PAUSE button is pressed for the first time while the washer is in QC Test Mode, so most homeowners will never encounter it during normal laundry cycles.

A simple power reset will not resolve the underlying cause of the bS error. Because the code is generated during QC Test Mode when the START/PAUSE button is first pressed, it will reappear each time that test sequence is run until the faulty connector or sensor is repaired. Address the root cause first, then verify the fix by re-running the QC test.

If the fix is simply reseating a loose connector, there is no parts cost involved, and a service call fee in the range of $75 to $150 may be the only expense. If the ball sensor itself needs to be replaced, parts and labor combined could range from $100 to $250 depending on your location and the service provider. Getting a diagnostic quote before authorizing any repair is always recommended.

Start by locating the ball sensor and checking that its wiring harness connector is firmly and fully seated. If the connector was loose, reseat it and re-enter QC Test Mode to confirm the error is gone. If the connector is secure but the error persists, the ball sensor itself is likely faulty and will need to be replaced.

The bS error is specific to QC Test Mode and does not appear during standard wash cycles, so it does not directly prevent normal washer operation. However, if the washer is being serviced or inspected and this code appears, the ball sensor issue should be resolved before completing the repair sign-off to ensure all components are functioning correctly.