Error Code AC
The main control board and the display board can't talk to each other
Moderate
Address soon - your appliance may not work properly
Also displayed as: No display
What This Means
Main PBA or Sub PBA is defective; Communication connection between Main PBA and Sub PBA is not properly connected; Sub wire harness is damaged
What actually causes this:
A wire connection came loose between the control boards, or a power surge damaged a board
First Thing to Check
Turn off the dishwasher at the circuit breaker, wait 60 seconds, then turn it back on
Parts Involved
How to Fix
- 1
1. Check connections between Main PBA CN802 connector and Sub PBA CN101 connector — reconnect
- 2
2. If error persists after reconnecting, replace Sub Wire
- 3
3. If error persists after replacing Sub Wire, replace Sub PBA
- 4
4. If error persists after replacing Sub PBA, replace Main PBA
This Error Applies To
Samsung DW80R9950U Series Dishwashers (2023) (2023–present)
Related Error Codes
The dishwasher isn't getting enough water
Water is getting into the dishwasher when it shouldn't be
The main control board and the motor control board can't communicate
The dishwasher can't drain the dirty water out
The dishwasher tried multiple times to drain but keeps failing
The water distribution motor that directs spray isn't working properly
The water temperature sensor isn't reading correctly
The heating element isn't warming the water