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Samsung Washing Machine Error Code AC: Communication error
Applies to Samsung washing machines that show AC or AE, ACb, AC6 on the display.
The washer's control boards are failing to communicate with each other. Try a power reset first.
What this code means
Modern Samsung washers run several electronic modules that talk to each other. This family of codes (AC, AE, ACb and variants) means that conversation has broken down.
The manufacturer's checks, in order
- Power the washer off for 2–3 minutes.
- Power it back on and restart the cycle.
If the error continues, Samsung says to request service.
Parts involved in this fault
| Part | Why it is involved | Typical price | |
|---|---|---|---|
| Main control board | The board at the centre of communication and system faults. Technician fitting. | $100-$250 | Check priceaffiliate slot |
Related Samsung washing machine codes
LE — Water level / leakage error4E — Not filling error5C — No drain errordE — Door errorUE — Unbalanced load error4C2 — Hot/cold error
Source & provenance. The meaning, the checks and their order, and the service line on this page are restated from Samsung official support — “Samsung Washing Machine Information and Error Codes” (source), read on 2026-11-06. No forum content, no invented repair steps, and nothing involving gas, refrigerant or mains wiring. Where the manufacturer says to request service, this page stops too.