Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to Samsung dryers
- Confidence medium
- Also displayed as AC, AC7, AE3, AE4, AE5
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
One electronic module is not exchanging valid data with another module, such as the main board, display, Wi-Fi board or secondary dryer board.
Most likely causes
- A connector or harness is loose or damaged
- Moisture or heat has affected an electronic board
- The display, Wi-Fi, secondary or main board has failed
- Supply voltage is unstable
Safe checks for the owner
- Disconnect power for several minutes and retry once.
- Note whether the display, Wi-Fi or only one dryer section is affected.
- Request service if the code returns; do not repeatedly cycle power.
Estimated U.S. repair cost
$280–$620, depending on model, access, parts availability and local labor.