Written by
Adrian Soto Appliance Repair Content SpecialistPublished October 20, 2026
Error codeCA PBA communication
ApplianceDishwasher
Quick answer
CA on a Samsung dishwasher is a communication check between the main and sub PBAs, pointing to an open circuit or broken wiring.
Model compatibility: Samsung reuses codes across series and model years, so CA PBA 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
Communication check between the main and sub PBAs: open circuit or broken wiring.
CA on a Samsung dishwasher is a communication check between the main and sub PBAs, the printed board assemblies. It is displayed when the circuit is open or the communication wiring is broken. Samsung’s Australian and UAE pages list it for current dishwashers.
What the UAE page suggests
Inspect the wiring for damage and make sure the connections are secure. Unplug the dishwasher before you look at anything electrical.
Related codes
CE: the control panel cannot communicate with the rest of the dishwasher
bC3: the panel does not respond or acts erratically
Samsung dishwasher repair in Los Angeles
For Samsung dishwasher repair in Los Angeles, call (310) 896-4231. Tell us the CA code, your model number and what you saw when you checked the connections. More is on the dishwasher repair page.
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.
