Error code
Samsung Washing Machine Error Code AC
The washer has detected an internal communication fault between electronic control systems. The most likely cause is temporary control-board communication interruption. Check first: reconnect power and try one short restart only.
Quick decision
AC
What it usually means
The washer has detected an internal communication fault between electronic control systems.
First safe action
Turn the machine off and unplug it from the mains for a few minutes.
Stop and call an engineer when
Call an engineer if AC returns after one restart, the controls freeze, or the machine behaves unpredictably during power-up.
Meaning
Samsung washing machine error code AC usually means the control electronics are not communicating properly. In most cases, that points to a temporary board communication fault, unstable power, or an internal wiring problem rather than a normal user-reset issue.
Check first by switching the machine off completely and giving it one clean restart. If the washer also shows other electronics-related faults, compare the pattern with Samsung AE or motor-control issues such as Samsung 3C.
In practice, AC is commonly linked to Temporary control-board communication interruption, Internal wiring or connector issue, or Electronic control board fault.
Likely causes
- Temporary control-board communication interruption
- Internal wiring or connector issue
- Electronic control board fault
How to fix it safely
- Turn the machine off and unplug it from the mains for a few minutes.
- Reconnect power and try one short restart only.
- If AC returns immediately or the controls behave erratically, stop using the washer and compare it with Samsung AE rather than repeating resets.
Can I fix this myself?
NoBeyond one power reset, AC is not a good DIY fault because the likely causes are internal electronic or wiring issues.
Safety boundary: Do not remove panels or handle internal connectors once the code returns after a restart.
When to call an engineer
Call an engineer if AC returns after one restart, the controls freeze, or the machine behaves unpredictably during power-up.
Safety warning
Disconnect the appliance from the mains and avoid opening the cabinet, because this fault usually involves internal electrical components.
Useful hub links
Related power and control fault codes
Samsung Washing Machine Error Code AC6
The washer has detected a communication problem between internal control modules.
Samsung Washing Machine Error Code AE
The washer has detected an internal communication error in the electronic control system.
Samsung Washing Machine Error Code 3C
Motor drive or drum movement issue
Samsung Washing Machine Error Code 3E
Motor drive or drum movement issue
Relevant guide
Frequently asked questions
Can I keep using a Samsung washing machine with AC showing?+
No. Try one safe restart only, then stop using the machine if AC comes back.
Will resetting clear Samsung AC permanently?+
Only if the fault was a brief electronics interruption. If AC returns, the communication problem is still there.
Is Samsung AC dangerous?+
It can be, because the fault involves the washer's control electronics rather than a simple user-serviceable part.