When you’re looking for ways to reduce utility expenses, getting a smart thermostat is a smart move. These devices learn your favorite temperatures and routine and then create an energy-efficient schedule to match. What’s even better is that you can regulate and watch your settings from almost anywhere with your phone, whether you’re relaxing in bed or away from home. (You might even be able to receive a free smart thermostat depending on rebate programs from your utility provider in Corpus Christi.)

Most of the time, hooking up a smart home thermostat with the help of Total Assurance AC & Heating is a simple task if you have a new house. But what if your house is older or doesn’t have the correct wiring? Can you still have a smart thermostat without C wire? We’ll help you demystify the process so you can choose the ideal thermostat and receive energy savings for a long time.

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

Most programmable thermostats need batteries. When you’re switching to a smart thermostat, you’ll discover that many have to have a C wire, or common wire, for power. Without this wire, your new thermostat could cause your heating and cooling system to have glitches.

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

  1. Cut power to the thermostat at the breaker.
  2. Pull off the thermostat and look at the wiring.
  3. If there are five or six multicolored wires, you have what you need 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 nearly there. Make sure the C wire isn’t tucked within the wall. If you can’t find one, we may be able to install 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 run a smart thermostat with an adaptor specifically 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 isn’t right and you don’t want to replace it.

Do Nest or ecobee Need a C Wire?

Two of the best-selling brands are the Nest smart thermostat and ecobee smart thermostat. If you have two to four wires, these thermostats may be a match for your needs.

Nest says its thermostats are made to require very little power and can frequently share it with your home comfort system. However, you may need to have a professional like Total Assurance AC & Heating add a C wire with the Nest Thermostat E or Nest Learning Thermostat if you’re experiencing power problems or a battery that’s constantly drained.

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

Trust Total Assurance AC & Heating for Your Smart Thermostat Installation Needs

At Total Assurance AC & Heating, we’re always seeking methods to keep you more comfortable while keeping utility expenses reasonable. If you want to learn more about switching to a smart thermostat without a C wire, contact us at 361-217-7080. We can help you select the right model for your residence and even install new wiring if needed.