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How to Replace an Old Thermostat -- by Home Repair Tutor

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Hi, I’m Jeff Patterson with Home Repair
Tutor, and in today’s video, I’m going
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to show you how to replace an old thermostat.
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Maybe you’ve got one that’s ancient and
just needs to be replaced or you’ve got
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a newer one that went kaput, like the one
I’ve got here – it’s a digital thermostat,
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and it no longer works after 10 years, which
is a bummer.
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But the good news is it’s super easy to
replace an old thermostat that’s not working
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anymore.
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So let’s get to it.
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Of course, before you do anything, turn the
power off to your heating and cooling system.
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Here’s my old thermostat; it turned off
‘cause it was hard-wired.
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And I’m going to wire up a new Honeywell
thermostat.
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It’s RTHL2310, and it’s real simple.
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All you have to do is tilt the old thermostat
forward and pull it off the base plate.
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Typically, there’s a pin connector that
holds the thermostat to the base plate along
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with four clips.
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If you have an old thermostat with mercury,
dispose of it properly.
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Take a picture of your existing wiring.
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That’s going to help you wire the new thermostat.
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But also, take note of how the wires are wired.
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And you’ll want to label them with the appropriate
labels.
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As you can see here, I labeled the green wire
with the G sticker.
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And the rest of the wires I labeled according
to the old configurations.
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So that’s why the blue wire has a W2 sticker
on it.
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Remove the screws that hold the base plate
to the wall, and then carefully – when I
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say carefully, I mean very carefully – hold
the wires with one hand and pull the base
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plate off the wall.
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You don’t want the wires to go back behind
the wall; it’s a real pain, and that’s
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why I put a vice grip set of pliers on the
wires to hold them in place.
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Drill holes in the wall that match the base
plate, and put some blue tape on the wall
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to catch any of the dust.
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Place the blue inserts into the wall.
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Pound them into place with a hammer or the
base of your screwdriver, like me.
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Carefully feed the base plate over the wires.
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And you may have to trim any of the wires
coming out of the wall – that’s what I
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had to do here.
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And then unscrew the small terminal screw
using a precision screwdriver.
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Stick the wires into their corresponding slots,
and then tighten down the terminal.
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Remove the vice grip, and here you go.
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Here’s the wiring.
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I put the blue with the blue, G with the G,
yellow with the yellow, W with the white,
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and R with red.
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Secure the base plate to the wall.
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Remove your blue tape with all the dust on
it – I just simply did that over the thermostat
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box that came with the Honeywell thermostat.
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Put the batteries in.
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Remove the sticker.
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And then make sure that this switch is set
to either GAS OR OIL or ELECTRIC.
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I have an electric furnace.
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Press the thermostat down onto the tabs.
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And you’re almost done.
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You have to set the time for all programmable
thermostats.
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Set the time.
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Hit the run button, and you’re good to go.
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Now, the last thing you need to do is set
up the Heat, Off, or Cool, and then set the
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Fan to either Auto or On.
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Well, there you go.
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That’s how you replace an old thermostat
that’s not working anymore.
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And remember, if you like this video, give
it a thumbs up over on YouTube so that other
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people can see it and benefit from all the
different tips.
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You can also click the subscribe button.
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If you like DIY videos – maybe you’ve
got a new house or an old house that’s new
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to you and that needs a lot of work to it
– I think that you’ll like my videos because
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they share a ton of awesome tips.
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All right, thanks for joining me today.
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I really appreciate your time.
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I’ll see you in the next video.
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Take care!

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