Error Code AC
The washer's two main circuit boards have lost communication with each other.
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: AC
What This Means
Signals between sub and main PBAs not sensed; Incorrect wire connections between sub and main PBAs; Disconnected wires; Sub PBA short-circuited due to moisture; Defective main PBA communication circuit
What actually causes this:
A loose wire harness connector inside the machine, often from vibration over time.
First Thing to Check
Unplug the washer for one minute and plug it back in.
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 WA46CG3505 Series Washers (2024) (2024–present)
Related Error Codes
The vibration sensor that helps keep the washer balanced is not working.
The vibration sensor board is not communicating properly.
The vibration sensor board has a hardware fault.
The washing machine motor is not spinning or responding properly.
The cold water hose is hooked up to the hot water faucet.
The laundry inside is bunched up on one side, so the washer cannot spin safely.
The washer is getting too much voltage from the electrical outlet.
The washer is not getting enough voltage from the electrical outlet.