Written by
Nadia Okafor Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeAC
ApplianceDishwasher
AC in brief
Name: PCB communication check
Reading: the link between the main PCB and the sub PCB is abnormal
Listed by: Samsung’s Australian information code page, current generation
If it carries on: get in touch with Samsung service
Display needed
A real code can only be read on a model with a digital display. Dishwashers lacking one blink lights instead; if yours is flashing, the user guide explains the pattern.
Owner steps
The listing includes no steps for an owner with AC. Only the advice to contact Samsung service when the problem continues.
For AC that will not clear, call (415) 969-6153 and ask for Samsung dishwasher repair in the San Francisco Bay Area. Have the model number and a description of what the dishwasher does on hand.
Model compatibility: Samsung reuses codes across series and model years, so AC 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
The main PCB and the sub PCB are communicating abnormally.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
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