LG Washer Error Code 3E4

The 3E4 code indicates a motor error on your LG washer. It is triggered when the control board detects a problem with the drive motor circuit, which can include a disconnected wiring connector, an unengaged motor spin net, damaged internal motor coils (either shorted or open), or foreign material obstructing the motor. The washer stops operation to prevent further damage when this fault is active.

No, you should not continue running the washer while the 3E4 code is active. A motor with damaged coils or a mechanical obstruction can overheat, cause further internal damage, or in some cases create a fire or electrical hazard. Stop use and diagnose the fault before resuming operation.

Repair costs depend on which component is at fault. If the fix is simply reseating a loose connector or removing a foreign object, costs may be limited to a service call fee, typically in the range of $75 to $150. Replacing the drive motor can cost between $150 and $350 in parts and labor, while PBA replacement tends to range from $200 to $400 depending on the board and labor rates in your area.

Some causes of the 3E4 error are DIY-accessible. You can safely check that all wiring harness connectors going to the motor are fully seated and free of corrosion, and inspect the motor area for foreign objects like coins or debris. However, testing motor coil resistance, diagnosing the motor spin net, and replacing the PBA or motor require disassembly and electrical testing that are better suited to a qualified technician.

A power reset may temporarily clear the 3E4 code, but if the underlying fault still exists, the code will return once the washer attempts to run the motor again. A reset is not a fix. The root cause, whether it is a loose connector, foreign material, a damaged coil, or a faulty PBA, must be identified and corrected to permanently resolve the error.