Samsung washer dryer combo error code
AC Main and sub board communication error
The main control board and the sub board are not communicating.
Try these free fixes first
Unplug the washer dryer combo before opening any panel.
- Turn the machine off.
- Wait a minute, turn it back on and restart the cycle.
Still showing AC?
If AC persists, contact Samsung or a technician to check the boards and the wiring between them.
Prefer a pro?Compare quotes from local appliance repair services.Get repair quotes (soon)
Questions people ask
What does AC mean on a Samsung washer dryer combo?
AC on a Samsung washer dryer combo means: main and sub board communication error. The main control board and the sub board are not communicating.
How do I fix Samsung washer dryer combo error AC?
Turn the machine off. Wait a minute, turn it back on and restart the cycle.
When should I call a repair technician?
If AC persists, contact Samsung or a technician to check the boards and the wiring between them.
Related washer dryer combo codes
Samsung OCWasher dryer combo: Water has overflowedSamsung LCWasher dryer combo: Check the drain hoseSamsung 3CWasher dryer combo: Drum motor check neededSamsung 3CPWasher dryer combo: Electronic control check neededSamsung UCWasher dryer combo: Low voltage or motor checkSamsung HCWasher dryer combo: High temperature heating checkSource: Samsung official support · Reviewed 2026-10-01