Samsung · Washer Moderate

UC — / 9C — Voltage Error

UC (or 9C) means the washer detected incoming voltage that is too high or too low for safe operation, so it paused the cycle.

Keep using it?
Yes, with caution
DIY difficulty
Easy
Verified against
samsung.com ↗

How to fix it

  1. Plug the washer directly into a dedicated wall outlet (no extension cord/power strip).
  2. Test the outlet voltage; have an electrician check the circuit if it is unstable.
  3. Power-cycle the washer.

Why it happens

Typical signs: Cycle pauses or will not start · UC or 9C on the display

  • Unstable household voltage Brownouts, an overloaded circuit, or a bad outlet.
  • Extension cord or poor connection Washers should be on a dedicated outlet, not an extension cord.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Outlet Voltage Tester Common replacement
    Amazon →

More Samsung washer codes

3C 3C / 3E — Motor Fault 4C 4C / 4E — Water Supply Error 4C2 4C2 — Hot water connected to cold inlet 4E 4E — Water supply error (older code, same as 4C) 5C 5C / 5E / SC — Will Not Drain 5E 5E — Drain error (older code, same as 5C)

All Samsung codes → All washer codes →

Frequently asked questions

What does the UC code mean on a Samsung washer?

UC (or 9C) means the washer detected incoming voltage that is too high or too low for safe operation, so it paused the cycle.

What causes the UC code on a Samsung washer?

Unstable household voltage: Brownouts, an overloaded circuit, or a bad outlet. Extension cord or poor connection: Washers should be on a dedicated outlet, not an extension cord.

Is it safe to keep using a Samsung washer with a UC error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix UC on a Samsung washer?

Plug the washer directly into a dedicated wall outlet (no extension cord/power strip). Test the outlet voltage; have an electrician check the circuit if it is unstable. Power-cycle the washer.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.