Written by
Ethan Mercer Appliance Repair Content SpecialistPublished October 20, 2026
Content status:
Verified
Error codeCA PBA communication
ApplianceDishwasher
Quick answer
Code CA reports that the main and sub PBAs are not communicating, typically from an open circuit or broken wiring.
Model compatibility: Samsung can reuse or reformat 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 at a glance
Name: communications between main and sub PBAs check
Shown when: the circuit is open or the communication wiring is broken
Listed on: Samsung’s Australian and UAE pages
Check given: look the wiring over for damage and confirm secure connections (UAE page)
Disconnect power before inspecting anything. A technician is the better choice when wiring is involved.
Call (844) 482-1598 from the Miami, New York, Houston, Los Angeles or San Diego metro areas. Share the code, the model number and the condition of the connections. See our 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.
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Book a specialist visit for a clear estimate and approval before any repair.
