Error Code AC
The dryer's internal parts aren't communicating properly
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: AC
What This Means
Faulty Main PCB (main control board); Faulty SUB PCB (display board); Damaged or loose wire harness between Main PCB and SUB PCB
What actually causes this:
A loose wire connection between the control board and display, or a power surge scrambled the electronics.
First Thing to Check
Unplug the dryer for 2 minutes, then plug it back in — this resets the electronics.
Parts Involved
How to Fix
- 1
1. First check the PCB and wire harness connections between Main and SUB PCB
- 2
2. Inspect wire harness for pinched, cut, or corroded wires
- 3
3. Replace the PCB if the problem persists
- 4
4. If wiring is intact, replace SUB PCB first (more commonly at fault)
- 5
5. If error persists after SUB PCB replacement, replace Main PCB
Parts Commonly Needed for This Error
OEM part numbers confirmed by retailers
This Error Applies To
Samsung DV45M5500 Series Dryers (2024) (2024–present)
Related Error Codes
Your dryer is getting the wrong voltage from the outlet
A secondary temperature sensor is giving bad readings
A button on the control panel is stuck or shorted
Your dryer isn't heating properly or is overheating
The dryer thinks the door is open while running
Your dryer's temperature sensor isn't reading correctly
The door switch isn't working properly
Your dryer is getting the wrong type of electrical power