Written by
Adrian Soto Appliance Repair Content SpecialistPublished September 5, 2026Updated October 20, 2026
Error codeAC PCB communication
ApplianceDishwasher
Quick answer
AC on a Samsung dishwasher is a PCB communication check: the main PCB and the sub PCB are not communicating normally.
Model compatibility: Samsung reuses codes across series and model years, so AC PCB communication may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
PCB communication check: abnormal communication between the main and sub PCBs.
AC on a Samsung dishwasher is the PCB communication check. It means the communication between the main PCB and the sub PCB is abnormal. The code is listed on Samsung’s Australian information code page for current dishwashers.
Only some models show a code
Only models with a digital display can show an information code as an actual code. Models without a display use blinking lights; if the lights are flashing, see your user guide to interpret them.
What to do
The listing gives no owner steps for AC. If the problem continues, contact a Samsung service centre.
For Samsung dishwasher service in Los Angeles, call (310) 896-4231. Have the AC code and your model number to hand, and say what the dishwasher does. Our dishwasher repair page has further details.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
