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Samsung Dishwasher 9C1 / 9E1 / UC Error Code
Power supply problem. Here is what it means and how to clear it, easiest fix first.
The dishwasher has detected abnormal voltage and gone into protection mode. It often follows a power flicker, surge, or a tripped breaker.
Listed on Samsung's UK guide. UK models also show 9C2 when the dishwasher won't start or stops mid-cycle after power problems.
How to fix Samsung 9C1 / 9E1 / UC
Power cycle the dishwasher
Switch the dishwasher off at its circuit breaker (or unplug it) and wait about 1 to 5 minutes. Restore power and start a fresh cycle. If the code clears and stays away, it was likely a one-time glitch.
Use a dedicated outlet
Plug the dishwasher directly into its own wall outlet, without an extension lead, adapter, or other heavy appliance on the same socket. Check that the cord isn't damaged.
When to call a technician
If the code returns on a dedicated outlet, have an electrician check the supply, then request service if the supply is fine.
Other Samsung dishwasher codes
- 4C / 4ENot enough water coming in
- 5C / 5E / SC / SEDishwasher is not draining
- OC / 0C / OEToo much water in the tub (overfill)
- LC / LELeak detected
- 1E / IEClogged filter or overheating (depends on model)
- HC / HEHeater or overheating error
- tE / tCTemperature sensor error
- 3CWash pump error
- 3EIncoming water too hot (US) or pump error (UK/AU)
- 9E / 1CLow water level
- 7E / 7CWaterwall reflector blocked or misplaced
- bE / 6E / 6CStuck button
- CE / ACCommunication error between boards
- PC / PEZone Wash or Half Load error
- DCDoor not closed properly
- APWi-Fi setup mode (not a fault)
Frequently asked questions
What does 9C1 / 9E1 / UC mean on a Samsung dishwasher?
The dishwasher has detected abnormal voltage and gone into protection mode. It often follows a power flicker, surge, or a tripped breaker.
Can I fix Samsung 9C1 / 9E1 / UC myself?
Often. The first steps above are safe checks a homeowner can do. If they don't clear 9C1 / 9E1 / UC, the cause is likely a worn part that needs replacing.
What if 9C1 / 9E1 / UC keeps coming back?
A code that returns after a reset and the checks above usually means a part is wearing out. Note when 9C1 / 9E1 / UC appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.