Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to Samsung dishwashers
- Confidence medium
- Also displayed as 7C
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
The dishwasher could not confirm normal movement or position of the WaterWall vane or distributor mechanism.
Most likely causes
- An item in the lower rack is blocking the vane
- The vane belt or gear is disengaged or broken
- The position sensor or drive motor has failed
- The harness or main control is not receiving position feedback
Safe checks for the owner
- Remove the lower rack and confirm no utensil or debris is blocking the moving vane.
- Do not force the vane by hand against resistance.
- Restart once after clearing an obstruction; request service if the code returns.
Estimated U.S. repair cost
$240–$520, depending on model, access, parts availability and local labor.