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Samsung Washer Error Code AC
A communication error between the washer's control boards.
Also shown as: AE, AC3, AC4, AC5, AC6, 13E Last verified: 2026-10-30
Most likely causes, in order
| Cause | How common |
|---|---|
| A loose wiring connector between control boards, often after moving the machine | Common |
| A failed sub-board: sensor board, Wi-Fi board, display board or inverter board | Common |
| A failed main control board | Less common — service job |
What to try, easiest first
- Switch the washer off and unplug it for 2–3 minutes, then plug it back in and restart. This clears a one-off communication glitch.
- Check the washer was not recently moved or knocked — a loose connector is the kindest explanation.
- If the code returns immediately on every restart, stop. Board-level diagnosis needs a technician with the service manual for your model.
Reset procedure
Soft reset (first try): press Power to switch the washer off, wait about 2–3 minutes, switch it back on and restart the cycle. If the code was a one-off sensor glitch, it often clears here.
Hard reset: switch the washer off, unplug it from the wall outlet (or switch its breaker off) for 2–3 minutes, plug it back in and restart. Never open a panel or touch wiring while it is plugged in.
When to call a technician
Call a technician if the code returns on every restart, the display is dead or frozen, or the washer does nothing at all. Do not swap boards by guessing.
Difficulty, time and cost
| Difficulty | Service job after the reset |
|---|---|
| Typical DIY time | 5 minutes for the reset (editorial estimate, not a quoted time) |
| Part / job cost | $100–$200 for a control board part alone. Board part range from the part-cost guide; the exact board depends on the sub-code (AC, AC3, AC4, AC5, AC6) and your model — never order blind. Prices vary by model and area — treat every figure as an estimate, not a quote. |
Model notes and limits
AC is the family label; the sub-code narrows it down — AC3 is the drive module, AC4 the Wi-Fi board, AC5 the display board and AC6 the inverter board. Always record the full sub-code before calling service.
Front-load and top-load models, AddWash/FlexWash models, and US versus UK displays can show the same fault differently. Always confirm against the manual for your exact model number (on the label inside the door or lid, or on the back of the washer) before ordering a part.
Related codes
Frequently asked questions
What does 'communication error' actually mean?
The washer has several small control boards that talk to each other. This code means one of them stopped answering — a loose wire, or a board that has failed.
The reset cleared it once. Should I still worry?
A single clear after a power cut is usually fine. If it returns even once more, get it checked — intermittent board faults tend to get worse.
Can I find which board failed from the code alone?
Partly. Sub-codes point to a board family, but the exact part still depends on your model number. A technician confirms it before ordering.
Sources
- Samsung WA50M7450AW user manual — Troubleshooting codes (via ManualsLib) — https://www.manualslib.com/manual/2698765/Samsung-Wa50m7450aw-A4.html?page=36 (checked 2026-10-30)
- North London Appliance Repairs — Samsung washing machine error codes — https://www.northlondonappliancerepairs.co.uk/discussions/washing-machine-help-forum/samsung-washing-machine-error-codes.html?print=1&tmpl=component (checked 2026-10-30)
- Solo Appliance Repair — Samsung washer error code list — https://soloappliancerepair.com/comprehensive-guide-to-samsung-washing-machine-error-codes/ (checked 2026-10-30)