Samsung · Dishwasher
Samsung Dishwasher PC Error Code
Zone wash or half-load position fault
What this error means
PC flags a Position Error on Samsung dishwashers with movable wash zones—Zone Booster or WaterWall reflector systems. The control commanded travel along the bottom rail but the position sensor never confirmed the expected location.
How PC is detected
When PC appears on a Samsung dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On Samsung DW80J7550US, Samsung DW80R9950US, 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 PC calls are resolved without parts: remove lower rack and check reflector path is clear. 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 PC 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
- Shipping tape still on the Zone Booster or reflector rail from factory
- Utensil or pot handle blocking shuttle travel along the bottom
- Reflector or booster vane installed incorrectly on the gray shuttle
- Motor or belt driving the zone shuttle failed
Step-by-step fixes
- 1Remove the lower rack and inspect the bottom rail for blue packing tape remnants
- 2Confirm the Zone Booster or reflector moves freely by hand along the full rail
- 3Clear any fallen silverware from the rail track before starting a cycle
- 4Power-cycle one minute and run a Normal cycle—listen for shuttle movement at wash start
When to call a technician
Free rail travel with PC every cycle needs zone motor or position sensor replacement.
Affected models
- Samsung DW80R9950US
- Samsung DW80B7070US
- Samsung DW80N3030US
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent PC from lint and food debris buildup.
- Record when PC appears in the cycle and whether it clears after a 60-second power reset on your Samsung dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for PC; Samsung uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting PC; reversed plugs on pumps and valves cause immediate repeat faults.