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's communication circuit is faulty, replace it

Samsung Washers2024–present

Error Code AC

Two internal circuit boards cannot communicate with each other

Moderate

Address soon - your appliance may not work properly

Also displayed as: AC

What This Means

Signals between sub and main PBAs not sensed due to communication error; Incorrect or loose connections between sub and main PBAs; Sub PBA faulty soldering; Main PBA communication circuit fault

What actually causes this:

A wire connector between the control boards came loose or has corrosion

First Thing to Check

Unplug the washer for 5 minutes and plug it back in to reset the electronics

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's communication circuit is faulty, replace it