UC Moderate Easy DIY

Samsung Washer UC / 9C — Voltage Error

Samsung Washer · Error code UC

What UC Means

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

Symptoms

  • Cycle pauses or will not start
  • UC or 9C on the display

Common Causes

1
Unstable household voltage

Brownouts, an overloaded circuit, or a bad outlet.

2
Extension cord or poor connection

Washers should be on a dedicated outlet, not an extension cord.

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.

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.

Common replacement Outlet Voltage Tester View on 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 →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.