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

1. undefined: 1. Check the wire connections and terminal contacts between the sub and main PBAs 2. undefined: 2. Check for disconnected wires 3. undefined: 3. Check whether the sub PBA is short-circuited because of moisture 4. undefined: 4. Remove the sub PBA C/Panel and check for any faulty soldering 5. undefined: 5. If the main PBA communication circuit is faulty, replace it

Samsung Washers

Error Code AC

The washer's two internal circuit boards cannot talk to each other

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: AC

What This Means

Signal loss between sub and main PBAs; Incorrect or loose wire connections between sub and main PBAs; Faulty soldering on sub PBA C/Panel; Main PCB fault; Sub PCB fault

What actually causes this:

A wire connector between the control boards came loose or got corroded by moisture

First Thing to Check

Unplug the washer for 60 seconds, then restart

Parts Involved

Sub PBAMain PBAWire Harness

How to Fix

1
1. Check the wire connections and terminal contacts between the sub and main PBAs
2
2. Check for disconnected wires
3
3. Check whether the sub PBA is short-circuited because of moisture
4
4. Remove the sub PBA C/Panel and check for any faulty soldering
5
5. If the main PBA communication circuit is faulty, replace it