water dispenser fault? rs21dcns samsung?

The water dispenser stopped working on the American side by side fridge/freezer. I suspected a frozen water tank behind the top veg drawer as there was a build up of ice on the rear wall around the insulated pipes. I left the door open for a couple of hours and indeed the ice went and the water again dispensed correctly. However, it seems the ice tray in the ice maker was not receiving water. With the veg drawer back in place and the door closed again, within 2 days the old problem was back. IS THIS TERMINAL?