AC6
Samsung Washing Machine
Severity: ModerateWhat Does This Error Mean?
The AC6 error means there is a communication problem inside your Samsung washer. The main control board and the sub control board have lost contact with each other. Think of it like two computers in the machine that stopped talking. This can sometimes be fixed with a reset — but may require professional service.
Affected Models
- WF45R6100AW
- WF50R8500AV
- WF45T6000AW
- WF42H5000AW
- Most Samsung front-load washers with dual-board architecture
Common Causes
- Loose internal wiring harness between the main and sub control boards
- Power surge or electrical spike that disrupted board communication
- Moisture or condensation on the control boards causing short circuits
- Faulty sub control board that has failed and is not responding
- Faulty main control board unable to send or receive signals correctly
How to Fix It
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Unplug the washer from the wall outlet.
Leave it unplugged for at least 5 full minutes to allow the boards to fully reset.
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Plug the washer back in and press the Power button.
A full power reset clears many temporary AC6 errors caused by power surges or momentary glitches.
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Start a short test cycle — such as a Rinse+Spin — and observe.
If the cycle completes without the error, the reset worked. Monitor for a few more washes.
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Check the power outlet and circuit breaker for your washer.
A loose outlet or a circuit that trips under load can interrupt board communication. Try plugging the washer into a known-good outlet.
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If AC6 returns after the reset, stop using the washer and call a technician.
A recurring AC6 means a physical wiring or board issue. Continuing to run the machine can cause further damage.
When to Call a Professional
If a power reset does not clear the AC6 error, the wiring or a control board needs inspection. Control board diagnosis and replacement is not a DIY job for most people. Contact Samsung support or a certified appliance repair technician. Expect repair costs of $200–$450 depending on which board needs replacement.
Frequently Asked Questions
What does AC6 mean in plain English?
Your Samsung washer has two circuit boards inside that work together. The AC6 error means they have stopped communicating with each other. It is like two people in the machine suddenly going silent. Without that communication, the washer cannot safely run a cycle.
Can a power surge cause the AC6 error?
Yes — this is a common trigger. A sudden power spike or outage can scramble the boards' communication. A 5-minute full power reset often clears it after a surge. Consider using a surge protector for your washer to prevent repeat occurrences.
Is AC6 covered under Samsung's warranty?
If your washer is under the standard 1-year Samsung warranty, AC6 repair is covered. Samsung also offers extended warranties through Samsung Care+. Contact Samsung at 1-800-726-7864 with your model and serial number. Have your purchase date ready when you call.