For the Samsung Washer families covered by the source set, **UC** means **power / voltage error**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. Samsung uses overlapping code conventions across model years and regions. This page keeps the appliance context attached to the code so a same-looking string from another product family is not misapplied. The recorded display form is **UC**. Search normalization stores it as **UC** 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 codeUC
ApplianceWasher
Quick answer
Power / voltage error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so UC 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, **UC** means **power / voltage error**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. Samsung uses overlapping code conventions across model years and regions. This page keeps the appliance context attached to the code so a same-looking string from another product family is not misapplied. The recorded display form is **UC**. Search normalization stores it as **UC** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
One clue that supports the UC diagnosis is that the appliance may stop, restart, or refuse a high-load function.
A symptom that fits UC is that the code can appear after a surge, brownout, outage, incorrect supply, or frequency problem.
Depending on the exact model, some models preserve the display even when one required power leg or voltage range is abnormal.
When the UC condition is present, uC appears during the washer stage associated with power / voltage error.
The UC display becomes more meaningful if the cycle can pause, stop, retry, drain, or refuse to advance until the condition is cleared.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Power / voltage error
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
To rule out an accessible cause, confirm the breaker has not tripped and the appliance is connected as specified by Samsung.
Before requesting service for UC, if the event followed an outage or surge, perform only the documented one-time power reset.
Before opening any service area, do not perform live mains-voltage measurements unless qualified.
A safe owner-level check is to stop if breakers trip repeatedly, plugs/outlets overheat, or there is arcing.
The next non-invasive check is to record the code and the cycle stage where it appears.
The next non-invasive check is to check owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Important safety warning. When working around a washing machine that shows UC, keep the checks external and non-invasive. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips.
Get help
When to request repair service
If the owner-accessible checks do not clear UC, Persistent power/voltage codes need the household supply and appliance power/control circuits checked safely before parts are replaced. 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 **UC** display should be treated as diagnostic evidence, not as a reason to keep rebooting the appliance.
That depends on the accompanying symptom. A code with no safety hazard may allow a short diagnostic check, but **UC** should not be ignored if performance is deteriorating or the display keeps returning.
No. **UC** 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 UC** separate from same-looking codes used by other Samsung appliance families.