Hi all - We got our 2-ton geo unit last week (1500 sf house), and it seemed to be doing fine, until we went away this weekend. It has been around 40 degrees outside, higher during the day. Turned the temp down to 60 while we were gone. Got home, thermostat read 58 and geo was running on the electric backup. A friend was over the feed the cat yesterday, she said it was running while she was there. We are finding that the heat is really not coming out strong on the first floor, it is barely coming through the vents. Unit is on the third floor in the attic. Second floor is nice and toasty, and we have even closed the ducts in a couple of the rooms to try and force it downstairs, but it's just not doing it. We have a propane insert in the living room, too, and even with it running, the heat is not getting warmer than 63. Help?