Just had my central air replaced but this new one doesn't seem to work properly. When it is in the cooling operation, it goes "on and on" blowing hard (at least for 20 minutes) and I need to cover myself as I am very sensitive to hot and cold. When the cooling finally stops , I become hot very quickly. I told my installer but he didn't seem concerned and pointed out that the outside unit's grills needed some cleaning. This morning I decided to check my humidistat and it was at 80. What do you think about the functioning of this unit? My place is 1,300 sq. ft. 2 bedrooms and 2 bath rooms. My unit costs me $5,600. A lot for a senior.