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 PBA (main control board); Faulty Sub PBA (display board); Damaged or loose wire harness between Main PBA and Sub PBA; Corroded or pinched wiring in communication bus
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. Check wire harness connection between Main PBA and Sub PBA for loose or damaged connectors
- 2
2. Inspect wire harness for pinched, cut, or corroded wires
- 3
3. Check the wire among the main sub PCBs — verify wiring is in good condition
- 4
4. If wiring is intact, replace Sub PBA first (display board — more commonly at fault)
- 5
5. If error persists after Sub PBA replacement, replace Main PBA
Parts Commonly Needed for This Error
OEM part numbers confirmed by retailers
This Error Applies To
Samsung DV52M7750 Series Dryers (2024) (2024–present)
Related Error Codes
Your dryer isn't heating properly or is overheating
Your dryer is getting the wrong voltage from the outlet
The dryer thinks the door is open while running
The dryer motor isn't spinning properly
A secondary temperature sensor is giving bad readings
Your dryer's temperature sensor isn't reading correctly
Your dryer is getting the wrong type of electrical power
The door switch isn't working properly