I replaced my old 2 1/2 Ton York system with a new 3 ton Trane XL16i HP and VS blower last month. Well today my installer came out and replaced my trane touch screen TS with the Trane touch screen TS w/ humidity control. I assumed the switch out went fine. The last month it has been fairly mild, here in PA, and everything seemed to be working just fine. Well today it got very cold and is now about 28 degrees outside. When I got home from work about 5:30pm my new TS read 68 degrees inside. So I bumped the setting up to 71 degrees. Well the heat has been on now for about 5 1/2 hours and it has never reached 71 degrees on the TS. I know it's cold outside but to raise the temp. 3 degrees should not be a problem, I wouldn't think. Is there something wrong here? I have a call in with my installer but so far he has not called me back. Any feedback would be appreciated.