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
- 9C1 returns on a known-good dedicated supply
- The outlet, plug, or cord is hot, damaged, arcing, or smells burnt
- Diagnosis would require live mains-voltage or PCB testing
Likely causes
- Incoming mains voltage is too high or unstable for the washer
- A surge, power-quality event, or unsuitable circuit caused the control to detect abnormal supply voltage
- An extension lead, overloaded outlet, or shared heavy-load circuit is contributing to unstable supply
- The washer's power-input or electronic-control circuit needs model-specific diagnosis if normal supply is confirmed
Quick checks, in order
Use a proper wall outlet
Connect the washer directly to its intended grounded wall outlet. Do not use an extension lead or multi-adapter for this test.
Check for recent power disturbances
Note any surge, flickering lights, breaker trip, generator use, or other supply event that occurred when 9C1 appeared.
Power-cycle once
Turn the washer off, disconnect power for a few minutes, reconnect it to a proper outlet, and retry once.
Stop before live-voltage measurements
If 9C1 returns on a known-good supply, mains-voltage, PCB, harness, and power-input diagnosis should be handled by qualified service.
Does 9C1 return on a stable, correctly supplied circuit?
A temporary supply disturbance is plausible. Retry once only after the electrical supply is stable.
The original outlet, extension, adapter, or shared circuit was likely contributing to the voltage problem.
Stop repeated resets and arrange model-specific diagnosis of the washer's power-input and control electronics.
Stop and get qualified help when
- 9C1 returns on a known-good dedicated supply
- The outlet, plug, or cord is hot, damaged, arcing, or smells burnt
- Diagnosis would require live mains-voltage or PCB testing
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 is the difference between Samsung 9C1 and 9C2?
Samsung groups both as voltage errors, but model-specific Samsung guidance identifies 9C1 as an over-voltage/electronic-control condition and 9C2 as low voltage on supported models.
Can an extension cord cause 9C1?
An unsuitable extension or overloaded shared circuit can contribute to abnormal supply conditions. Samsung recommends a proper power supply; test the washer directly from its intended outlet.