How do I fix error code AC4 on a Samsung washers?

1. undefined: 1. Check the connector connections between the Wi-Fi Module and main PBA carefully 2. undefined: 2. Check for incorrect or loose connections 3. undefined: 3. Remove the Wi-Fi Module and check for any faulty soldering 4. undefined: 4. If connections are fine, replace the Wi-Fi Module or main PBA

Samsung Washers2024–present

Error Code AC4

The Wi-Fi module inside the washer stopped communicating with the main board

Moderate

Address soon - your appliance may not work properly

Also displayed as: AC4

What This Means

Communication error between Wi-Fi Module and main PBA; Incorrect or loose connections between Wi-Fi Module and main PBA; Faulty soldering on Wi-Fi Module

What actually causes this:

The Wi-Fi module connector came loose or the module itself went bad

First Thing to Check

Unplug the washer for 60 seconds and plug it back in — if the error returns, it needs service

Parts Involved

Wi-Fi ModuleMain PBAWire Harness

How to Fix

1
1. Check the connector connections between the Wi-Fi Module and main PBA carefully
2
2. Check for incorrect or loose connections
3
3. Remove the Wi-Fi Module and check for any faulty soldering
4
4. If connections are fine, replace the Wi-Fi Module or main PBA

Parts Commonly Needed for This Error

OEM part numbers confirmed by retailers

This Error Applies To

Samsung WF45A6400A Series Washers (2024) (2024–present)

Service manual exact match: WF45A6400AV/USService manual exact match: WF45A6400AW/USService manual exact match: WF45A6400AC/USService manual exact match: WF22C6400AV/AXService manual exact match: WF22C6400AW/AXService manual exact match: WF22C6400AP/CO