!!
critical Samsung
Error Code Ac
Check communications between main and sub PBAs — communication error between control boards.
? What Causes This
Main PBA (Printed Circuit Board) or sub PBA communication failure.
✓ How to Fix It
- Try power off and restarting the cycle.
- If code remains, contact customer service centre.
Source: page 48 of the official manual
From the manual
This error code appears in:
Samsung WW70J4373MA Front Load Washing Machine