thermostat is surprisingly
easy to do. In most cases it can be accomplished
in 15 minutes with just a screwdriver. But more
important is why you should consider installing
A new thermostat will save energy and money, all
the while making your home more comfortable.
thermostats allow you to set the temperature for
your home by time of day and by day of the week.
This allows you to set a comfortable temperature for
times when you are home, a lower temperature while
are sleeping and another temperature while you are
away from home. Plus, if you select the feature, you
can program different schedules for different days
of the week.
Installing a New Thermostat
Turn off the power
to your furnace first. Remove the
cover plate to your old thermostat. It is important
to note which wires are connected to which
terminals. Taking a digital picture is a good idea.
Disconnect the wires from the thermostat and secure
them so that the wires cannot fall inside the wall.
Clip the wires with a clothes pin or large paper
clip is effective. Unscrew the thermostat base from
the wall and remove it.Each manufacturer's
instructions will vary regarding installation. Our
guide provides the general steps for installation
but you should always follow the specific
instructions provided with your new thermostat.
Run the wires through the base plate of the new
thermostat and re-secure the wires with the clothes
pin. Secure the base to the wall with one screw. If
you don't have a level handy, tighten it enough that
it will hold the thermostat in position. Step back a
few steps and determine how much to adjust it to
make it level. After adjusting, step back again. If
it looks good, install the other screws.
Your old thermostat should have labels for each
terminal. If it was made in or after 1973, they
should match the labels in your new thermostat.
Simply install the wires to the matching terminals
on the new thermostat.
If there is any question as to the wiring, it may
be necessary to note the wire colors and then check
which color is connected to what on the furnace,
boiler, heat pump or air conditioning. If with that
information you still cannot make a determination
call for service.
Snap the cover onto the base, turn off the heat
and cooling operations on the thermostat and restore
power to the system at the circuit breaker. Test the
heat by turning the thermostat to "Heat" and "On"
and listen for the furnace to start and check for
warm air. Test the AC similarly. Note that you
should not operate the AC when outdoor temperatures
are below 65 degrees; limit the test to determining
whether the system starts when turned on.
** Heat Pump t-stats are more complicated. I
recommend you call for service to have this done. We
have specials going on for $200.00 that include
labor and T-stat.(Programmable or non- programable)
Now, program the thermostat with temperatures and
times for operation and you re done.
for Thermostats Manufactured
in 1973 or later
- R: "Hot" side of
transformer or RH for heat, RC for cool
- W: Heat control
- W2: Heat, second
stage (pink or other color)
- Y2: Cool, second
compressor stage (blue or
or X: Common side of
transformer (24 V) (black)
- Y: Compressor
- G: Fan (green)
- O: Energize to cool
(heat pumps) (orange)
- L: Service
indicator lamp (tan, brown, gray or
- X2: Heat, second
stage (electric) (blue, brown, gray or
- B: Energize to heat
(blue or orange)
- B or X: Common side
of transformer (blue, brown or black)
- E : Emergency heat
relay on a heat pump (blue, pink, gray
- T: Outdoor
anticipator reset (tan or gray)