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
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 between Main PBA and SUB PBA
- 2
2. Inspect wire harness for pinched, cut, or corroded wires
- 3
3. Replace the PCB if the problem persists
- 4
4. If replacing SUB PBA does not fix the issue, replace Main PBA
This Error Applies To
Samsung DV50B5100 Series Dryers (2024) (2024–present)
Related Error Codes
The door switch isn't working properly
Your dryer isn't heating properly or is overheating
The dryer thinks the door is open while running
Your dryer detected restricted airflow during a vent test
Your dryer's temperature sensor isn't reading correctly
Your dryer is getting the wrong voltage from the outlet
Your dryer vent is over 90% blocked — needs immediate cleaning
Your dryer is getting the wrong type of electrical power