Samsung · Washing Machine
Samsung Washing Machine 3C Error Code
Motor position sensor not calibrated
What this error means
3C indicates the motor position sensor did not report expected rotor position at startup or during load sensing. Samsung's inverter needs hall sensor feedback to commutate the brushless motor—3C stops the cycle before agitation.
How 3C is detected
When 3C appears on a Samsung washing machine, the control board has confirmed that water did not leave the machine within the programmed drain window. On Samsung WF45T6000AW, Samsung WF45R6100AW, 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 3C calls are resolved without parts: unplug 15 minutes to reset inverter. 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 3C 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
- Loose hall sensor harness at the stator rear
- Object jammed between inner drum and outer tub blocking rotation
- Failed hall sensor after water leak onto the motor area
- Inverter board not processing position pulses
Step-by-step fixes
- 1Unplug fifteen minutes for inverter reset
- 2Rotate the drum by hand—it must spin freely without scraping
- 3Inspect the rear motor area for signs of water staining after a prior leak
- 4Retry Start on an empty drum—3C before any movement confirms sensor circuit fault
When to call a technician
Free drum with 3C at every start requires hall sensor or stator assembly service.
Affected models
- Samsung WF45T6000AW
- Samsung WF45R6100AW
- Samsung WA50R5400AW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use washing machines to prevent 3C from lint and food debris buildup.
- Record when 3C appears in the cycle and whether it clears after a 60-second power reset on your Samsung washing machine—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for 3C; Samsung uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting 3C; reversed plugs on pumps and valves cause immediate repeat faults.