I Want a Smart Thermostat but Don't Have a C Wire - What Do I Do?

June 09, 2021

When you’re looking for methods to decrease utility bills, upgrading to a smart thermostat is an intelligent idea. These devices adjust to the temperatures you like and routine and then make an energy-efficient schedule that matches. What’s even better is that you can regulate and keep an eye on your settings from almost anywhere with your phone, whether you’re lying in bed or on the go. (You might even be eligible for a free smart thermostat depending on rebate programs from your utility supplier in Wisconsin Rapids.)

In many instances, installing a smart home thermostat with the assistance of Rapids Sheet Metal Works Inc is a straightforward task if you have a newer home. But what if your house is older or doesn’t have the proper wiring? Can you still install a smart thermostat without C wire? We’ll help you figure out the process so you can select the correct thermostat and receive energy savings for a long time.

What Is a C Wire and What Does It Do on a Thermostat?

The majority of programmable thermostats use batteries. When you’re upgrading to a smart thermostat, you’ll discover that many need a C wire, or common wire, for power. If you don’t have this wire, your new thermostat might cause your heating and cooling system to have glitches.

You can determine if you have a C wire by doing the following:

  1. Cut power to the thermostat at the breaker.
  2. Take off the thermostat and find the wiring.
  3. If there are five or six multicolored wires, you have what’s needed for a smart thermostat. You might be wondering what color is the C wire on a thermostat—and the answer to that is typically blue.
  4. If there are three or four thin multicolored wires, you’re almost there. Ensure the C wire isn’t hidden inside the wall. If you can’t find one, we may be able to put in one for you or you may be able to use your new thermostat without one.
  5. If you have two thick wires, you may be able to install a smart thermostat with an adaptor just for high-voltage systems. Or you may be able to install a battery-powered smart thermostat, like the Lux Geo Wi-Fi Thermostat, if your wiring won’t work and you don’t want to replace it.

Do Nest or ecobee Need a C Wire?

Two of the top brands are the Nest smart thermostat and ecobee smart thermostat. If you have two to four wires, these thermostats could be a fit for your home.

Nest says its thermostats are created to need minimal power and can frequently share it with your heating and cooling system. However, you may need to have a professional like Rapids Sheet Metal Works Inc put in a C wire with the Nest Thermostat E or Nest Learning Thermostat if you’re experiencing power problems or a battery that’s always drained.

ecobee works with 24-volt systems (ones with three to six thermostat wires) and has a C wire adaptor. So, you’re taken care of if you don’t have a thermostat C wire.

Trust Rapids Sheet Metal Works Inc for Your Smart Thermostat Installation Needs

At Rapids Sheet Metal Works Inc, we’re always looking for ways to keep you cozier while keeping utility costs reasonable. If you have questions about upgrading to a smart thermostat without a C wire, contact us at 715-301-0256. We can help you choose the right model for your home and even install new wiring if needed.