What does error code AC mean on a Samsung washers?

The control boards inside the washer are not talking to each other. Communication failure; Incorrect/loose connections; Faulty soldering on sub PBA

How do I fix error code AC on a Samsung washers?

1. undefined: 1. Check connector connections between sub and main PBAs 2. undefined: 2. Check for incorrect or loose connections 3. undefined: 3. Remove sub PBA C/Panel and check for faulty soldering 4. undefined: 4. If main PBA communication circuit faulty, replace it

Samsung Washers2024–present

Error Code AC

The control boards inside the washer are not talking to each other.

Moderate

Address soon - your appliance may not work properly

Also displayed as: AC

What This Means

Communication failure; Incorrect/loose connections; Faulty soldering on sub PBA

What actually causes this:

A loose wire connection between the control boards, sometimes caused by vibration over time.

First Thing to Check

Unplug the washer, wait one minute, plug it back in, and try again.

Parts Involved

Sub PBAMain PBA

How to Fix

1
1. Check connector connections between sub and main PBAs
2
2. Check for incorrect or loose connections
3
3. Remove sub PBA C/Panel and check for faulty soldering
4
4. If main PBA communication circuit faulty, replace it

This Error Applies To

Samsung WA50B5100A Series Washers (2024) (2024–present)

Service manual exact match: WA50B5100AV/UWService manual exact match: WA50B5100AW/UWService manual exact match: WA50B5100AVService manual exact match: WA50B5100AWService manual exact match: WA49B5105AVService manual exact match: WA49B5105AWService manual exact match: WA49B5105AV/WService manual exact match: WA49B5105AW/W