How do I fix error code AC on a Samsung dishwashers?

1. undefined: 1. Check connections between Main PBA CN802 connector and Sub PBA CN101 connector — reconnect 2. undefined: 2. If check code continues after step 1, replace Sub Wire 3. undefined: 3. If check code continues after step 2, replace Sub PBA 4. undefined: 4. If check code continues after step 3, replace Main PBA

Samsung Dishwashers2018–present

Error Code AC

The dishwasher's main computer and the display board can't talk to each other

Moderate

Address soon - your appliance may not work properly

Also displayed as: No display (AC in recall)

What This Means

Main PBA or Sub PBA is out of order; Communication connection between Main PBA and Sub PBA is not properly connected; Sub Wire harness is damaged

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

Main PBASub PBASub Wire

How to Fix

1
1. Check connections between Main PBA CN802 connector and Sub PBA CN101 connector — reconnect
2
2. If check code continues after step 1, replace Sub Wire
3
3. If check code continues after step 2, replace Sub PBA
4
4. If check code continues after step 3, replace Main PBA

Parts Commonly Needed for This Error

OEM part numbers confirmed by retailers

This Error Applies To

Samsung DW80M9 Series Dishwashers (2018) (2018–present)

Service manual exact match: DW80M9960US/AAService manual exact match: DW80M9960UG/AAService manual exact match: DW80M9550US/ACService manual exact match: DW80M9550UG/AAService manual exact match: DW80M9990US/AAService manual exact match: DW80M9990UM/AA