How to Install a Heating Only Thermostat

A thermostat is the best way to control your entire home's temperature. They can monitor the air temperature and adjust accordingly. A heating only thermostat can only produce heat and has no AC component, so is generally a simpler device. A heat only thermostat can be installed at home.

Setting electronic thermostat heat to 68 degrees
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How to Install a Heating Only Thermostat

What Is a Heat Only Thermostat?

A heat only thermostat is a home thermostat which can only heat the air temperature, and not cool it down. Because they only have one function, they are 2 wire thermostats, usually consisting of a red wire for power and a white wire for heating. When the temperature drops below a set level, the thermostat closes the connection between these wires, bringing them together and activating the furnace. When the set temperature is reached, the connection between these wires is closed and the furnace shuts off.

It's worth checking if your heat only thermostat also has a c wire (or "common wire").This enables continuous flow to your red wire, acting as the thermostat's power source.

How to Install A Heat Only Thermostat?

To install a heat only thermostat, you'll first need to attach the wall plate to the wall, and check with a level to make sure it's straight. Use drywall anchors and screws, and go slowly so you can correct as you go.

Next, strip back your wires and connect them to their terminals. You can then attach your thermostat to the wall plate, pushing until you hear a click. You should make sure the joins of your wires are secure, and can cover them with electrical tape to insulate. If your thermostat has a c wire, this is when you should also connect that to its terminal.

To check your thermostat setup, remove the access panel from your furnace and check the thermostat wire. It should be connected to the terminal strip, with the red and white wires at their appropriate terminals.

You can then turn on the power and set up your thermostat according to its instruction manual .

Safety Tips

Even though thermostat installation is a relatively low-voltage application, it's still important to be careful when undertaking any DIY electrical work. When working with electricity, you always want to be absolutely sure the power is off. Not only do you want to switch off the wall power, but switch the circuit breaker to the off position, too. Make sure you never work near any water, and wear safety gloves.

Annie Walton Doyle

Annie Walton Doyle

Annie Walton Doyle is a freelance writer based in Manchester, UK. Her work has appeared in The Huffington Post, The Daily Telegraph, Professional Photography Magazine, Bustle, Ravishly and more. When not writing, she enjoys pubs, knitting, nature and mysteries.