We just bought our house last September. Now that it is getting warm we are noticing that the second story is warmer then the rest of the house. I know that the second floor was added on after the original house. I am thinking that the central air was not made for cooling both floors. I do have vents in the two rooms upstairs but you can barely feel the air coming out. The have electric heat, so it doesnt matter to me in the winter but now its getting pretty bad. What are my options here? Do I just need to buy a new unit, and if so any ideas of how much I am looking at? The furnace is new, so I dont need it replaced. I also notice that my thermostat never falls, the air just runs and runs like it cannto cool fast enough. I know the thermostat is good because it worked fine when I was heating the house.I think the central air was meant for only the first floor, and the addition of the second has messed everything up, but I am unsure of where to go from here to fix it. Anyone have any air conditioning experience??