New Maytag dishwasher doesn't clean

Our dishwasher is only 4 months old. It doesn’t clean at all. We have checked the screens, the water gets hot enough but there seems to be little water pressure to clean the dishes. It takes over 3 hours on normal wash to leave dirty dishes. I tried quick clean but that doesn’t work either. Is there anything we can do about the water pressure? Our old Kitchen Aid never had this problem.