Written by
Nadia Okafor Appliance Care EditorPublished October 26, 2026
VERIFIED
Error code9C1 / UC / 9E1
ApplianceDishwasher
When the control reports bad voltage
The labels 9C1, UC and 9E1 all describe the same condition. The control has found abnormal or excessive voltage and switched to protection mode. Typical triggers are a power flicker, a surge or a tripped breaker. The unit turns on yet declines to wash.
Steps, in order
Inspect what feeds the machine: the outlet or circuit, the power cord and the line connection.
If a surge, flicker or trip happened before the code first appeared, cut power at the wall or breaker for at least a minute. Restore it and start a standard wash straight away. A code that clears points to a short-lived disturbance on the line.
If it is still displayed, run the dishwasher from a good dedicated outlet or circuit. Leave out extension leads and multi-adapters, and keep a heater or tumble dryer off the same outlet.
When the code disappears on the clean circuit, the earlier supply was the cause rather than the dishwasher.
Codes that resemble 9C1
9C2: it powers on, then will not wash after power dips
If 9C1 survives the dedicated-circuit test, phone (415) 969-6153 and we can talk through Samsung dishwasher repair for your Bay Area home. Tell us which outlet you used and whether the breaker has tripped.
Model compatibility: Samsung reuses codes across series and model years, so 9C1 / UC / 9E1 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
Abnormal or excessive voltage was detected and the dishwasher entered protection mode, often following a power flicker, surge or breaker trip.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Samsung appliance?
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