How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?

Make sure the thermostat is set to the system you want to program (Heat or Cool).

1. Press SET until Set Schedule is displayed.
2. Press up or down to set your weekday Wake time (Mon-Fri), then press SET.
3. Press up or down to set the temperature for this time period, then press SET.
4. Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
5. Press SET to set weekend time periods (Sat-Sun), then press RUN to save & exit.
   
   

To cancel an unwanted time period (except Wake), press and hold up + HOLD for 4 seconds while in the Set Schedule mode.