LG Washer Error Code AE

The AE code on an LG washer signals a communication error between the main PBA and the sub PBA, the two primary control boards in the machine. The washer cannot detect the signals being exchanged between these boards, so it shuts down to avoid unsafe operation. The cause can be a loose connector, damaged wiring, or a fault in one of the two boards. Checking the wiring connections between the boards is the recommended first step.

No, you should not continue using the washer while the AE code is active. The error means the control boards cannot communicate, so the machine cannot reliably manage its own functions such as the door lock, water fill, and motor. Running the washer in this state could lead to unpredictable behavior or water-related issues. Resolve the fault before resuming use.

Repair costs vary depending on what is causing the fault. If the issue is simply a loose connector, a service call may only cost the diagnostic fee, typically in the range of $75 to $150. A wiring harness replacement generally adds $50 to $150 in parts. Replacing a sub or main PBA can bring the total repair cost to anywhere from $200 to $500 or more, depending on the specific board and labor rates in your area.

A knowledgeable DIYer can attempt the initial diagnostic step, which involves inspecting and reseating the wiring connectors between the sub and main PBAs. If the connectors look secure and the error persists, diagnosing a broken wire harness or a failed board requires multimeter testing and familiarity with appliance wiring. Board replacement is straightforward mechanically, but identifying which board is faulty without the right tools can be difficult. If you are not comfortable working with appliance electronics, a technician is recommended.

A power reset by unplugging the washer for a few minutes may temporarily clear the display, but the AE error will return if the underlying wiring or board fault is still present. A reset does not repair a loose connector, a broken wire, or a failed PBA. The code should be treated as a persistent fault until the root cause is diagnosed and corrected.