I recently installed a Honeywell TH5220D1003 thermostat (thanks to the help of this forum) and it is working fine except it shows the inside temperature as 2 degrees warmer than it actually is. In order to maintain 78 degrees actual temperature I have to set the thermostat for 80. I have checked the actual temperature with 3 other thermometers and they all show 78 degrees while the Th5220D1003 shows 80. I was wondering if there is a way to adjust or recalibrate the thermostat where it will reflect the actual temp instead of being 2 degrees off. Any advice?