New construction on 2 story completed in September 2006. Rheem Mod downstairs, and a rheem 2 stage in the attic to service the upstairs. Had no problems with heat this winter, except for the Mod Stat going bad on us and having to get a replacement.
We keep the temperature set at about 77 F upstairs on the Honeywell thermostat, and that keeps things comfortable. Downstairs, we have the stat set at 71 F and it still feels warm downstairs. We set an indoor/outdoor thermostat on top of the mod stat, and it reads 76 F. The downstairs has more windows and two sliding patio doors, but even on days when the doors are not opening and closing a lot. It feels warmer downstairs than upstairs. If we set the thermostat lower, it gets cool enough, so I don't think there is a problem with a leak or anything else wrong with the setup.
Can the thermometer on the mod stat be recalibrated? Any other thoughts on why it feels warmer downstairs?