We have a 2 story house - one air-conditioning unit - upstairs is 10-15 degrees hotter than main level. Any suggestions? Heating is about the same - that much cooler in the winter.

I'm having problems with my AC units not cooling the house. The units are 4 years old and the first summer the AC worked so good that I had to set the thermostat to 75 or it was way to cold. In the fall the heat pump kicked on and I noticed that the outside units didn't turn on. I called service and they came out and said the units were not wired properly. They re-wired everything at the air handlers. Now I have even more problems. The emergency heat doesn't work and the AC won't cool the house. A side note is that the re-wiring didn't need to happen in the first place because the thermostat was set to furnace and not heat pump. I believe this was the only problem, but it was noticed to late. The other day it was 95 outside and the ac ran all day and could only keep the house at 80. I tried messing with the thermostat and told it the unit was a furnace again because it worked so well the first year. Funny thing is when I did this and turned it to cooling the units blew hot air. It actually turned on my emergency heat strips you could smell the heat. What can I do to fix this. I have a feeling that the heat strips are running at the same time my AC is trying to cool the house. I have had the AC units checked and they are fully charged and no service issues.