Match the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
Show stop conditions
- Plug, outlet, or cord is hot
- Breaker trips repeatedly
- Live voltage testing is required
Likely causes
- Power was interrupted or unstable
- Outlet, breaker, or plug is loose
- Control did not restart cleanly
- Supply voltage is outside specification
Quick checks, in order
Check breaker and outlet
Use the required dedicated supply and no extension cord.
Disconnect power briefly
Wait several minutes before reconnecting once.
Look for outage signs
Check clocks and nearby appliances.
Arrange supply testing if repeated
A qualified electrician should test voltage and connections.
What happens when UC appears?
Restart only after stable power returns.
The branch circuit or outlet may need inspection.
Stop until supply and controls are checked.
Stop and get qualified help when
- Plug, outlet, or cord is hot
- Breaker trips repeatedly
- Live voltage testing is required
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
What does UC mean on a Samsung washer?
On many model families, UC indicates that the power supply voltage is unstable. Confirm the exact model and region because the same display can be used differently.
Can I clear UC by unplugging the washer?
A short power reset may clear a temporary state, but it will not fix a blocked hose, leak, failed sensor, motor, heater, or wiring fault. Stop if the code returns.
Should I replace a part based only on the code?
No. A code identifies a system or condition, not always the failed component. Complete safe external checks and use the model-specific manual or qualified service.