Samsung Washer code **C0** is associated with **factory test mode is active**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **C0**. Search normalization stores it as **C0** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeC0
ApplianceWasher
Quick answer
Factory test mode is active.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so C0 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
Samsung Washer code **C0** is associated with **factory test mode is active**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **C0**. Search normalization stores it as **C0** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
Depending on the exact model, the display appears while the appliance is otherwise able to respond as expected.
On affected Samsung washing machine models, the message may be tied to a mode, test, reminder, setup state, or protective condition rather than a failed part.
A symptom that fits C0 is that normal operation can resume after the documented mode or condition is cleared.
On affected Samsung washing machine models, c0 appears on the display while the appliance reports: Factory test mode is active.
Why it happens
Possible causes
varies by model — official regional/current support — Factory test mode is active
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Before opening any service area, confirm the exact display characters and appliance model before treating the message as an issue.
With C0 recorded, verify the user-facing setting, mode, door, filter, container, or setup condition named by Samsung for this display.
Before requesting service for C0, use the model-specific manual to clear the status; avoid repeated resets if the message reappears unexpectedly.
With C0 recorded, record the code and the cycle stage where it appears.
To rule out an accessible cause, verify owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Before opening any service area, power-cycle once only where Samsung's guidance recommends it; if the same code returns, move to model-specific diagnosis.
Important safety warning. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips. Do not bypass a safety device merely to see whether C0 disappears.
Get help
When to request repair service
For C0, the service threshold is straightforward: Service is not automatically required. Request diagnosis only if the status cannot be cleared as designed or normal operation does not resume. Bring the exact model number and a photo of the display so the diagnosis stays tied to the documented Samsung code.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
One controlled restart is reasonable after correcting an obvious external issue. A recurring **C0** display should be treated as diagnostic evidence, not as a reason to keep rebooting the appliance.
The display can be normal in the documented context. If **C0** appears unexpectedly, cannot be cleared, or prevents normal operation, then the issue deserves diagnosis.
Treat **C0** as a starting point, not a replacement instruction. Wiring, feedback signals, operating conditions, and electronic controls can mimic a failed component.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Washer C0** separate from same-looking codes used by other Samsung appliance families.
