Samsung · Dryer
Samsung Dryer AC Error Code
Electronic control communication fault
What this error means
AC (1 AC, AE3 variants) indicates the main PCB cannot exchange data with a sub-module—display, motor driver, or moisture sensor board. The dryer may beep and halt with time frozen on the LED.
How AC is detected
When AC appears on a Samsung dryer, the control board has confirmed that water did not leave the machine within the programmed drain window. On Samsung DV50F9A6EVP, Samsung DVE45R6300V, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most AC calls are resolved without parts: turn breaker off two minutes—longer than a brief button power-off. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If AC returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Ribbon cable unseated during console removal
- Condensation on connectors in unventilated closets
- Surge damage to communication lines
- Failed display or interface PCB
Step-by-step fixes
- 1Turn breaker off two minutes—longer than a brief button power-off
- 2Ensure closet installations have louver vents per Samsung clearance specs
- 3Check SmartThings for firmware updates addressing comms errors
- 4Document whether AC appears before drum start or mid-cycle with heat active
When to call a technician
Repeating AC after extended power loss requires harness continuity tests and likely PCB swap.
Affected models
- Samsung DV50F9A6EVP
- Samsung DVE45R6300V
- Samsung DVE45R6100W
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dryers to prevent AC from lint and food debris buildup.
- Record when AC appears in the cycle and whether it clears after a 60-second power reset on your Samsung dryer—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for AC; Samsung uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting AC; reversed plugs on pumps and valves cause immediate repeat faults.