I recently purchased a newly constructed home in Bergen county NJ and am having nothing but problems with my entire HVAC system (heat and cool). I have a split gas forced hot air funance / AC with one unit installed in my attic serving my second floor (3 bedrooms and 2 bathrooms) and the second unit installed in my basement serving my basement and first floor (kitchen, dining room / living room, family room and half a bathroom).
My issue in the winter months is that the temps in each of my bedrooms differs greatly. The thermostat is installed in the hallway and can be set to 74 degrees but my master bedroom will be 78 degrees while my daughter room is only 69-70 degrees. When I questioned the HVAC technician who installed the unit he said that this is normal behavior.
My issue in the summer is two fold. In this I mean, my second floor unit is now set to cool to 75 degrees but the bedroom reach this temp way before the therostat which in turn caused my bedrooms to get really cool and force my unit to run all day. Another thing that I noticed is that it takes several hours to cool my house a couple of degrees. The other issue is that my first floor unit is not cooling at all. My HVAC tech has been out over half a dozen times and each time he leaves stating everything has been fixed but once I get home and turn on the unit.... NOTHING!
I know this is a long post but I would love if someone could tell me if the following is true;
Is is true that it takes a fully operational HVAC unit one hour to cool a home one degree (i.e. If the house is 80 degrees and I would like it cooled to 74 degrees it should take the unit 6 hours of continuous running to reach this temp.)?
Is it normal to have dramatic temp shifts in each bedroom during the winter months?
Any information or pointers would be greatly appreciated.