An issue that we typically see with digital thermostats is that there is many times a large hole directly behind the thermostat where the wires come through. It is a very common occurrence to have air blowing through the drilled out toe plates in which wiring is run through. Having this air to go back and forth across your thermostat will change the temperate and can cause your unit to start and stop unnecessarily. Note: Most digital thermostats are so sensitive you can breathe on it and watch it change temperature. All homes have some air leakage with windows, doorways, exhaust fans, fireplaces, vent-a-hoods, recessed can lights, smoke detectors. All of the toe-plate holes that are over receptacles, switches, phone jacks, fire systems, and home alarm wiring, if not sealed with foam, can act as a point of air transfer.
Where is your thermostat located and how comfortable is your living area?
Your thermostat should be located near a large return duct in a centrally located area.
Places to avoid: By a window, by a refrigerator, on any perimeter wall in a bathroom, laundry room, your
kitchen, utility room, and not where a supply grill will blow air on to your thermostat.
Option #1: Move thermostat
Option #2: Buy a remote sensor thermostat and put remote sensor in a better location.