How To Install a Thermostat

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Getting a pro to replace a broken thermostat can be costly, but if you pay close attention, you can learn how to replace it yourself.

To complete this How-To you will need:

A Phillips screwdriver
Masking tape
A pen
A new thermostat
A level
A drill with a 3/16-inch bit
Drywall anchors
A hammer

Step 1: Turn off the main electrical power switch to the heating and air conditioning unit.

Step 2: Pry the cover from your old thermostat. Unscrew the wall mount to separate the thermostat's wiring from the wall.

Step 3: Using masking tape, label each wire as you disconnect it from its terminal connector. Then slip the sub-base over the wires and remove it from the wall.

Tip: Loosely knot the wires together to prevent them from slipping back inside the wall as you remove the sub-base.

Step 4: Pull the wires through the feed hole in the new thermostat and place it flat against the wall. Use a level to position it, and then mark the top, sides, and screw holes with a pen.

Tip: Make sure the new thermostat is level so it will work properly.

Step 5: Drill the screw holes and hammer the drywall anchors into the holes until they are flush with the wall.

Step 6: Carefully connect each wire to the new terminal and screw the new thermostat sub-base to the wall.

Step 7: Replace the outside cover of the new thermostat and restore power to the furnace.

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Category:

Howto & Style

Tags:

• HomeFamily
• thermostat
• install
• heat
• heating
• system
• temperature
• warm
• cold

[itsnigora]

I have no thermostat at all in my house, so who do I call to get one installed? btw, I live in the UK..

[sini8080]

1:00 Why does it have to be level to work properly? :S

[fredsfredX]

Wait. I have two black wires and lots of places to connect them on the thermostat. That's all I need, which wire goes where.

[Timario007]

i only have two wire which is which?

[sirensandhvaczzzszsz]

I have another one, how to unclog a toilet

[DjinnJuggler]

If anybody has mercury thermostats they don't want, I collect them for a website I run, please personal message me

[sirberner12]

all my wire are the same but one.what if a have a blue wire and the new one wants a yellow wire

[TheDeadDeadsons]

lucky!

[Kersplattt]

I dont really know. I think I was bored...

[yodog300201]

I have a hammer!