Samsung Washer - AC Error Code
Communication error between main and sub control boards.
Meaning
Communication error between main and sub control boards.
The AC error indicates that the washer has detected a communication failure between the main PCB (Primary Control Board) and the sub PCB. Samsung explains that this code appears when the internal control boards cannot exchange signals reliably, often due to wiring issues, loose connectors, or a failing board. Because the washer relies on synchronized communication to manage motor control, water levels, heating, and safety functions, the system halts operation when communication becomes unstable.
Symptoms
Causes
Step-by-Step Fixes
- Power off the washer and wait 1–2 minutes before restarting.
- Ensure the washer is receiving stable household power.
- Check for signs of moisture around the control panel.
- Restart the cycle after power is restored.
- If the error persists, the control boards may require service.
Safety Notes
- Unplug the washer before inspecting internal components.
- Do not attempt to remove the control boards without proper training.
- Avoid operating the washer during electrical storms or power fluctuations.
Applicable Models
Show Models
- 6000 Series: WW25FG6B34BBAC
- 5000 Series: WW25FG5B34BEAC
Related Pages
Other Samsung Washer Error Codes
Show All Error Codes
- Samsung Washer 0 Error Code
- Samsung Washer 1C Error Code
- Samsung Washer 3C Error Code
- Samsung Washer 3CP Error Code
- Samsung Washer 4C Error Code
- Samsung Washer 4C2 Error Code
- Samsung Washer 8C Error Code
- Samsung Washer 8C1 Error Code
- Samsung Washer 8C2 Error Code
- Samsung Washer 9C1 Error Code
- Samsung Washer 9C2 Error Code
- Samsung Washer AC6 Error Code
- Samsung Washer C5 Error Code
- Samsung Washer dC Error Code
- Samsung Washer DC1 Error Code
- Samsung Washer HC Error Code
- Samsung Washer LC Error Code
- Samsung Washer LC1 Error Code
- Samsung Washer Oc Error Code
- Samsung Washer SF Error Code
- Samsung Washer Ub Error Code
- Samsung Washer UC Error Code
Model-Specific Notes
The WW5000F/B700 platform automatically drains for 3 minutes when 4C or related water-supply errors appear, and the power button is disabled during this period.
Disclaimer
The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.