Error Code AC
The washer's two circuit boards are not talking to each other
Moderate
Address soon - your appliance may not work properly
Also displayed as: AC
What This Means
Incorrect wire connections between the sub and main PBAs; Sub PBA short-circuited due to moisture; Main PBA communication circuit fault
What actually causes this:
A wire connection between the control boards came loose, or moisture got into a circuit board
First Thing to Check
Turn off the washer, wait a minute, and restart — the machine may automatically return to normal
Parts Involved
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
This Error Applies To
Samsung WH53DBH700 Series Washers (2024) (2024–present)
Related Error Codes
The dryer is getting an unusual electrical power frequency
The dryer's control board is not receiving the correct voltage
A critical electrical component in the dryer is overheating dangerously
The dryer's safety temperature monitor is not working correctly
The dryer's door switch is not working correctly
The main control board and motor control board cannot communicate
The washer cannot read the water temperature correctly
The dryer thinks its door is open