Seeing **Ub** on a Samsung washing machine narrows the problem to **unbalanced load / spin error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **Ub**. Search normalization stores it as **UB** 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 codeUB
ApplianceWasher
Quick answer
Unbalanced load / spin error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so UB 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
Seeing **Ub** on a Samsung washing machine narrows the problem to **unbalanced load / spin error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **Ub**. Search normalization stores it as **UB** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
While Ub is active, the washer may extend the cycle while trying to redistribute the load.
When the Ub condition is present, high-speed spin may be reduced or canceled.
On affected Samsung washing machine models, laundry can remain wetter than expected after the cycle.
Ub can be accompanied by this pattern: ub appears during the washer stage associated with unbalanced load / spin error.
One clue that supports the Ub diagnosis is that the cycle may pause, stop, retry, drain, or refuse to advance until the condition is cleared.
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
As an external check for Ub, redistribute bulky or uneven items and avoid a single saturated item by itself.
A safe owner-level check is to confirm the washer is stable and level on a solid floor.
With Ub recorded, make sure the machine can drain fully before judging the spin system.
For Ub, start by doing this: try a small balanced test load rather than repeatedly restarting the same load.
To rule out an accessible cause, record the code and the cycle stage where it appears.
For Ub, start by doing this: check owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Important safety warning. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips. For Ub, stop troubleshooting immediately if the symptom crosses into a safety hazard rather than a normal diagnostic condition.
Get help
When to request repair service
If the owner-accessible checks do not clear Ub, If imbalance codes occur even with a stable empty/small balanced load, suspension, sensing, drive, or installation issues may need diagnosis. The repair should confirm the monitored function and its feedback before any board or component is condemned.
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 **Ub** display should be treated as diagnostic evidence, not as a reason to keep rebooting the appliance.
Short owner-accessible checks may be reasonable when the appliance is safe. Persistent **Ub**, worsening performance, or any electrical/water/heat hazard is a reason to stop use.
The code alone is not enough to justify a part. **Ub** should narrow testing to the affected function; the final cause still has to be verified on the exact model.
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 Ub** separate from same-looking codes used by other Samsung appliance families.
