Error Code AC
The dishwasher's main control board and display board can't talk to each other
Moderate
Address soon - your appliance may not work properly
Also displayed as: No display (silent)
What This Means
The Main PBA or Sub PBA is out of order; The communications connection for the Main PBA or Sub PBA is not properly connected
What actually causes this:
A power surge or loose wire connection disrupted communication between the control boards
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 the connector between Main PBA and Sub PBA (CN401)
- 2
2. Reconnect all communication connectors
- 3
3. Check for damaged wire harness between boards
- 4
4. If error persists, replace Sub PBA, then Main PBA
Parts Commonly Needed for This Error
OEM part numbers confirmed by retailers
This Error Applies To
Samsung DW80K7050U Series Dishwashers (2016) (2016–present)
Related Error Codes
The dishwasher isn't getting enough water
The dishwasher is having trouble draining water out
The dishwasher has repeatedly failed to drain the water
The water distribution motor can't find its correct position
The water temperature sensor isn't reading correctly
The heating element isn't warming the water properly
The water inside the dishwasher has gotten dangerously hot
A control panel button appears to be stuck or held down