stock market. Few hour-long home-improvement projects will
pay year-in, year-out cost-savings dividends like
replacing your old thermostat with a new programmable - or
"automatic setback" - model. Depending on the severity of
the winters where you live, you could realize a savings of
up to 35 percent on your yearly energy bills. Who wouldn't
want to do that?
Quick tip: when shopping for your new thermostat, check
the thermostat package to ensure it is compatible with
your home's system.
1. Turn off the power to
your heating and air-conditioning system at the main
service panel. Remove the old thermostat cover plate.
2. Unscrew the thermostat
mounting screws, and remove the thermostat body.
3. Label the low-voltage
wires to identify their screw-terminal locations using
masking tape. Then disconnect the wires.
4. Remove the thermostat
base by loosening the mounting screws. Tape the wires
to the wall to prevent them from slipping into the
5. Thread the low-voltage
wires through the base of the new thermostat. Mount
the thermostat base on the wall using the screws
included with the thermostat.
6. Connect the
low-voltage wires to the appropriate screw terminals
on the thermostat base. Follow the installation
diagram in your new thermostat's owner's manual.
7. Locate the low-voltage
transformer that powers the thermostat. The
transformer usually is located near the
heating/air-conditioning system or inside a furnace
access panel. Tighten any loose wire connections, and
make sure the wires and sheathing are in good
8. Install the battery or
batteries in the thermostat body, and attach the body
to the thermostat base. Restore power, and program the
thermostat as desired.