(RF28HMEDBBC) Hello CCMC! If the water from the dispenser is not cold, the cold water in the refrigerator's reservoir has been used up. The reservoir holds about a liter of water or 1.05 Qt. So if the water was cool, but is now warm, it will take time to cool down again. Please note, during the summer months, water enters the fridge at a higher temperature. This increases the time it takes to cool down. Hope this helps! ^Cole