Here are those options, starting from “most involved” and going all the way to “I hate this stuff, give me something easy”. https://smartthermostatguide.com/thermostat-c-wire-explained/. If your furnace does not have a C … Well, the R wire is a power source but it does not ensure a continuous supply when the furnace is OFF. If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall. My (horrible old!) Turn the power for the furnace and thermostat back on at the circuit breaker. The simplest way is to pop your thermostat off the wall and look at the wires behind it and where they are hooked up. Each of these wires has a name featuring a single letter (listed below). I noticed an unused blue wire and when I opened the furnace control panel I noticed that the blue wire was not connected to anything on that end either. If you don’t have a C-wire and your heart is set on having a smart thermostat in your home, your have a bunch of options (which can be mostly be boiled down to “get a C-wire” or “get a smart thermostat that doesn’t require a C-wire”). Depending on your home, this may be a short distance or daunting task. Although I’ve seen it stated in several places, it’s not entirely correct to say that the c-wire is what powers the thermostat. Then, come back here and follow along! Connect the white wire to the "W" terminal on the furnace and thermostat. Now, if you have a heat pump or a boiler or other accessories you should check for compatibility on those, too, but chances are if you made it this far, there’s something on the market compatible with your system. If you just have heating, you might find you use fewer wires than they assume you need to. Thermostat Terminals. Hi everyone! C = This is the common wire … First, confirm that you have a 24v (low voltage) HVAC system by visiting our quick visual guide to thermostat types. Remember, the colors don’t really mean anything. Also, the Stelpro is a Z-Wave or ZigBee thermostat. To make it continuous requires a common wire … So you’ve decided to install your new thermostat and discover that you have an unused wire but you do need a C wire connection. Here’s our latest shopper’s guide! C-Wires are required on most Honeywell Wi-Fi thermostats, with the exception of the Smart Round Thermostat (formerly known as the Lyric Round). I am hoping to get some advice on whether my thermostat/HVAC wiring can support an ecobee 3 lite without a power extended kit. If you already have four wires and just need a fifth to be the C-wire, you’re a good candidate for a Venstar Add-a-Wire adapter. Make sure you have a wire connected to the thermostat C terminal. furnace). It’s also a fantastic thermostat besides all that. My furnace board has a C-terminal available, but no wire from the thermostat bundle is connected to it. In today's video we are taking a look at how easy and simple it is to install a WiFi Thermostat with or with out a C Wire. Most, if not all, smart thermostat manufacturers have a help line you can call for personalized support, too, so give ’em a call if you’re truly stumped. The Rh wire connects to the RH terminal on your thermostat. The Blue or “C” Wire. Option 4: Use a C Wire Adapter Kit. You can either run that … Have connected C wire to new thermostat and made sure connected same wire at furnace terminals. Install a Nest thermostat at your own risk, Best WiFi-enabled Smart Thermostats of 2018 – Holiday Buyers Guide, Crunching the numbers: 3rd-party projects and alternative ways to analyze your Ecobee or Nest data, 6 reasons you might NOT save a bundle with a smart thermostat. If you have a low-voltage system with too few wires and you don’t want to (or can’t) run new wires, then check out the LuxGeo: many of its users report it works in their HVAC system when nothing else does. Every ecobee ships with an adapter that you can install yourself at your furnace to make up for a missing C-wire. There’s a lot of variation among heating/cooling systems and chances are, your heating system is different than what is featured here. This is more likely to be true if you see all the other color wires present. Remember, this is a site run by tech enthusiasts, not an HVAC expert familiar with your system, so be careful when you mess around with wires! The black wire from the thermostat bundle is unconnected on the furnace side, and just wrapped back around the bundle. Our ecobee Smart Si thermostat rating:   Smart Si at a Glance PROS Easy to create…, You've probably heard the term "low voltage" or "24v" while researching smart thermostats - but…, Heating and cooling account for nearly half of your home's energy costs! You can also use this wiring … You just need to connect ‘red’ wire from furnace to Rh and ‘white’ wire to W1. C: This stands for the “common” wire in an HVAC system, and it provides power to the thermostat. If you don’t see a wire you can identify as the C-wire, though, don’t despair yet – you may need to look behind your existing thermostat. If you don’t see a wire you can identify as the C-wire, though, don’t despair yet – you may need to look behind your existing thermostat. This is the nuclear option. You might want to hire a professional to do the job. Watch an easy solution to install a wifi thermostat without a c (common) wire. The place I recently moved into has a 4-wire thermostat installed, but there are also two unused wires at the thermostat (one brown, one blue). Then, go to your furnace and remove the panel to expose the circuit breaker. The cover is either held onto the back plate by snap clips … It’s small, easy to install, and ships with every ecobee from the ultra deluxe Alexa-built-right-in ecobee4 down to the “budget” option, the ecobee3 lite (which sacrifices nothing other than built-in Alexa and room sensors, which you can still buy and add later). See the Stelpro KI STZW402WB+ on Amazon.com. Thermostat wiring. … Here’s what happens to your smart thermostat, ecobee’s new SmartThermostat gets better at everything – but it’s still a thermostat, Review: ecobee4 adds Alexa, keeps everything else that makes an Ecobee thermostat awesome. This is, in our opinion, the best option if you can swing it. You … Put the access panel back on the furnace. The c wire, or … A C-wire is required for many smart thermostats because they need a constant flow of electricity from the furnace in order to keep the smart components running. The ecobee requires a C wire to power on. Whew – and that’s the basics. The C (common) wire is supposed to be blue and normally attached to chassis ground at the furnace. On the bright side, this option future-proofs your HVAC wiring and will let you choose basically any smart thermostat you want in the foreseeable future! A common wire (C-Wire) provides Wi-Fi thermostats continuous power by connecting it to a heating and cooling system (e.g. Technically speaking, power flows from the R (red) wire, but not continuously (not on its own, anyway). Here's a picture of the thermostat board: I see there is already something else connected to my C terminal, which I am guessing is my AC compressor. Next, let's talk about the C, or common wire. 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