What does error code AC4 mean on a Samsung washers?

The washer's WiFi module cannot communicate with the main board WiFi communication error; Sub PBA short-circuited due to moisture; Main PBA communication circuit fault

How do I fix error code AC4 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. If the main PBA communication circuit is faulty, replace it

Samsung Washers

Error Code AC4

The washer's WiFi module cannot communicate with the main board

Moderate

Address soon - your appliance may not work properly

Also displayed as: AC4

What This Means

WiFi communication error; Sub PBA short-circuited due to moisture; Main PBA communication circuit fault

What actually causes this:

The WiFi module connection came loose or the module got moisture damage

First Thing to Check

Unplug the washer for 60 seconds, then restart — also try reconnecting to your WiFi network via the SmartThings app

Parts Involved

Sub PBAMain PBA

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. If the main PBA communication circuit is faulty, replace it