For the Samsung Washer families covered by the source set, **B0** means **factory test mode is active**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. The exact stage when the code appears can be as important as the characters themselves. Note whether it happens at startup, during fill, heating, cooling, draining, spinning, drying, or after a power event. The recorded display form is **B0**. Search normalization stores it as **B0** 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 codeB0
ApplianceWasher
Quick answer
Factory test mode is active.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so B0 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
For the Samsung Washer families covered by the source set, **B0** means **factory test mode is active**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. The exact stage when the code appears can be as important as the characters themselves. Note whether it happens at startup, during fill, heating, cooling, draining, spinning, drying, or after a power event. The recorded display form is **B0**. Search normalization stores it as **B0** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
B0 can be accompanied by this pattern: the display appears while the appliance is otherwise able to respond as expected.
One clue that supports the B0 diagnosis is that the message can be tied to a mode, test, reminder, setup state, or protective condition rather than a failed part.
When the B0 condition is present, normal operation can resume after the documented mode or condition is cleared.
One clue that supports the B0 diagnosis is that b0 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.
For B0, start by doing this: confirm the exact display characters and appliance model before treating the message as an issue.
To rule out an accessible cause, verify the user-facing setting, mode, door, filter, container, or setup condition named by Samsung for this display.
A safe owner-level check is to use the model-specific manual to clear the status; avoid repeated resets if the message returns unexpectedly.
To rule out an accessible cause, record the code and the cycle stage where it appears.
With B0 recorded, check owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Before requesting service for B0, 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. If resolving B0 would require energized internal access, that is the point to hand the diagnosis to a qualified technician.
Get help
When to request repair service
Service is not automatically required. Request diagnosis only if the status cannot be cleared as designed or normal operation does not resume. If B0 keeps returning, record the stage at which it reappears so the technician can test the factory test mode is active path instead of replacing parts by guesswork.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You can try the one reset Samsung documents for the model, but **B0** returning afterward means the condition still exists. Note the operating stage instead of cycling power repeatedly.
The display can be normal in the documented context. If **B0** appears unexpectedly, cannot be cleared, or prevents normal operation, then the issue deserves diagnosis.
No. **B0** tells you which condition or check the control detected. The same display can result from the named component, its wiring, a connector, a supply/airflow/water condition, or the control that reads it.
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 B0** separate from same-looking codes used by other Samsung appliance families.
