Written by
Nadia Okafor Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeC-A0 / CA0
ApplianceMicrowave
Samsung lists CA0, shown with a dash as C-A0, under a functional error for its microwaves. C-A1 and C-A2 read the same way in the list. You will find it in the table for newer, current-generation microwaves.
Power-cycle checklist
Stop power reaching the oven: unplug it, or turn off the breaker feeding it.
Dampness is the one thing to rule out: a spill or cooktop steam means waiting for it to dry.
Dry unit? Pause for 60 seconds, then reconnect it.
Seeing CA0 a second time means the next move is a service request.
For Samsung microwave help in San Francisco and the wider Bay Area, see Samsung microwave repair and phone (415) 969-6153. Say which code is on the display, read out the model number and describe what you already did.
Model compatibility: Samsung reuses codes across series and model years, so C-A0 / CA0 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
C-A0 signals a functional error in Samsung's microwave code list.
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.
Ready to get your Samsung appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
