Power Supply Voltage Error

What it means

This code appears on Samsung front-load and top-load washing machines when the main board detects that the supply voltage is below or above the allowed range; older models show the same fault as 9E1. The washer stops to protect the board and motor, and may run again once the voltage is stable. The same code can mean something else on other brands, and its meaning may differ between some Samsung series.

Models covered: Samsung front-load and top-load washing machines; newer models show codes ending in C (e.g. 4C), older ones end in E (e.g. 4E) with the same meaning.

Related codes: AC3CHCDC

Symptoms4

• 9C1 appears at power-on or during spin.
• The code repeats at peak electricity times, such as summer afternoons with air conditioners running.
• Home lights dim or flicker when the code appears.
• The washer works normally at other times.

Possible causes6

• Fluctuating or low voltage in the area or building, especially under summer AC loads.
• Washer plugged into an extension cord or a weak or overloaded power strip.
• Loose or burnt wall socket.
• Socket voltage that does not match the rating label on the washer.
• Old household wiring or undersized cable.
• Faulty voltage sensing circuit on the main board (less common).

How to diagnose6

1. Unplug the washer for a few minutes, then restart it.
2. Plug the washer directly into a wall socket with no extension cord or power strip, and avoid running other large appliances on the same circuit during the wash.
3. Make sure the socket voltage matches the washer rating label, and look at the socket for looseness or burn marks.
4. Try washing at a quieter time of day to see whether the code follows voltage dips.
5. A qualified electrician measures the socket voltage while the washer runs and compares it with the rating on the appliance.
6. If the voltage is fine and the code repeats, a washer technician unplugs the washer before opening it and checks the main board.

How to fix6

1. Remove the extension cord or power strip and plug the washer into its own grounded wall socket.
2. Have an electrician replace a loose or burnt socket.
3. Fit a voltage protector rated for the washer if the supply fluctuates in your area.
4. Have an electrician check the household wiring if the voltage stays low.
5. Repair or replace the main board only if the supply voltage is confirmed good.
6. Run a full cycle and confirm the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low when removing a power strip, fitting a voltage protector or replacing a socket solves it, and reaches the high end only if the main board must be replaced.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions