Error Code AC4
The washer's WiFi module is not communicating 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; Wire disconnection
What actually causes this:
The WiFi module connector has come loose or the control panel board has moisture damage.
First Thing to Check
Unplug the washer for 60 seconds, plug it back in, and check if the error clears.
Parts Involved
How to Fix
- 1
1. Check wire connections and terminal contacts between sub and main PBAs
- 2
2. Check for disconnected wires
- 3
3. Check whether sub PBA is short-circuited due to moisture
- 4
4. If main PBA communication circuit is faulty, replace it
Parts Commonly Needed for This Error
OEM part numbers confirmed by retailers
Other Error Codes for WW22N6850QX
The main board and motor inverter have lost communication.
The washer cannot detect the water level correctly.
The washing machine motor is not spinning properly.
The motor is drawing too much power or not reaching the right speed.
The washer cannot pump the water out.
The control panel and the main computer board are not communicating.
The main computer and motor driver boards are not communicating.
The display screen is not communicating with the main board.