Is there a water dispenser on the refrigerator? Does it work?

Ice makers in refrigerators/freezers fill with water at the end of a harvest cycle. They trigger a harvest cycle via a thermostat on the ice mold, when it gets cold enough (i.e. the water in the mold has frozen). That's what triggers an ice maker in a new refrigerator to cycle and fill with water for its first batch of ice ... when it gets cold enough afrer the new refrigerator is turned on. They continue to cycle per that thermostat with the water turned off (there is of course no filling) unless the ice maker is specifically turned off (via a switch on it or by raising the tray arm).