Samsung Dryer AC Error — Communication Fault Fix

What it means

Samsung dryer AC is one of the communication error codes.
Samsung's exact wording for the category: 'This code means the dryer's internal components cannot communicate with each other.'
The control board, user interface, and inverter board talk to each other over an internal bus — when that signal is interrupted, AC appears.
The fix Samsung publishes is straightforward.

Affected Models

Samsung DVE45 / DVE50 / DVE52 series electric dryers
Samsung DVG45 / DVG50 / DVG52 series gas dryers
Samsung DV9000T / DV9100T Smart Dial series
Samsung BESPOKE AI laundry dryers
Samsung FlexDry and WashTower units (shared dryer module)

Common Causes

Brief electrical glitch interrupting internal data bus
Loose wire harness between control and user interface board
Loose connector at the inverter (motor) board
Firmware hang requiring a power reset to clear
Failed control or inverter board if reset doesn't help

How to Fix It

Turn the dryer off for 60 seconds.

Samsung's exact published fix: 'Shut off the dryer for 60 seconds, and then turn it back on again.'
Press the power button to turn it off.
Wait the full minute before turning back on — shorter resets sometimes don't fully clear the boards.
If 60 seconds doesn't work, do a full power cycle.

Samsung's deeper reset: 'Unplug it (or turn off power at the circuit breaker), wait some time for the electrical charge to clear out of the dryer (usually 1 to 5 minutes at most), and then power it up again.'
This forces a full board re-initialisation rather than just a soft reset.
Run a test cycle.

After the reset, start an Air Fluff or Time Dry cycle for 5 minutes.
If the cycle starts and runs normally with no AC, the reset cleared the fault.
Schedule service if AC persists.

Communication errors that survive a full power cycle indicate an actual hardware fault — a failed control board, inverter board, or a damaged wire harness between them.
This needs Samsung service.
The model number is on the inside of the door — have it ready when you call.

When to Call a Professional

If a 60-second power-off doesn't clear AC, the fault is on the control bus or one of the boards.
Schedule service — this isn't owner-repairable on modern Samsung dryers.

Frequently Asked Questions

Is AC the same as the AE communication error?

Both are in Samsung's communication-error category and clear with the same reset, but they report different specific failures on the internal bus.
AC tends to indicate the control board can't see the inverter (motor control) side; AE tends to indicate the user interface can't reach the main control.
For owner troubleshooting they're treated identically — the 60-second power-off works for both.