How to Install a programmable thermostat with This Old House

Watch this video from This Old House to learn how to install a programmable thermostat.

Steps:1. Turn off service switch at boiler.

2. Pull off cover from existing thermostat.

3. Unscrew thermostat from its wall-mounted sub-base.

4. Loosen wires connected to thermostat's sub-base.

5. Remove the old sub-base.

6. Hold sub-base of new thermostat to wall and connect red wire to "R" screw terminal, and white wire to "W" screw terminal.

7. Drill new screw-mounting holes for sub-base.

8. Push plastic wall anchors flush into holes and screw sub-base to wall.

9. Insert batteries into the thermostat and snap on the cover.

10. Turn the service switch back on.

11. Program the desired on/off time and temperature of the thermostat.