Error Code AC4
The washer's WiFi module cannot connect to the main control board
Moderate
Address soon - your appliance may not work properly
Also displayed as: AC4 (upper)
What This Means
Signals between the WiFi module and main PBA are not sensed; Communication error between WiFi module and main PBA; Incorrect or loose connector connections between WiFi module and main PBA; Faulty soldering on WiFi module
What actually causes this:
The WiFi module connector came loose or the module itself has failed
First Thing to Check
Turn off the washer at the circuit breaker, wait 60 seconds, then turn it back on — the washer should still wash even with this error
Parts Involved
How to Fix
- 1
1. Check the connector connections between the WiFi module and main PBA carefully
- 2
2. Check for incorrect or loose connections
- 3
3. Remove the WiFi module and check for any faulty soldering
- 4
4. Replace WiFi module if faulty
- 5
5. Replace Main PBA if WiFi module tests normal
This Error Applies To
Samsung WV55M9600A Series Washers (2024) (2024–present)
Related Error Codes
The washer is getting too much electrical power
The washer cannot detect the water level properly
The washer's motor cannot spin or is struggling to turn
The washer is not getting water
The incoming water is too hot for delicate wash cycles
The washer cannot pump the water out
The washer is not getting enough electrical power
The top and bottom washers cannot communicate with each other