It's a wire that (if you have one) runs all the way from your furnace to your thermostat.Questions about the C-wire are by far the biggest drivers of traffic to this site, so I've written this article to Unused C Wire Terminal. Example of No Common Wire Thermostat. For best results, we recommend installing a C-wire or a C-wire adapter. I am installing a Honeywell RTHWF with a TACO SR up vote 0 down vote favorite. Honeywell TH9320WF5003 Wi-Fi 9000 Color Touch Screen Programmable Thermostat, 3.5 x 4.5 Inch, White, 'Requires C Wire" 4.4 out of 5 stars 1,309 $136.99 $ 136 . First, you have to TURN OFF the furnace. You can still power it without the “C” wire but you will have to get creative with your connections. As there were no C wire available a have ran a new wire and connected to the C possition on … read more Honeywell Home is making it easier than ever to transition your customers from a non-connected to a connected thermostat. Heat Pump heating/cooling system Heat pumps are used to heat and cool a home. Thermostatic Controls - Need C Wire for Honeywell RTH6580WF - I'm trying to replace a Thermostat that went out. Glossary C wire The “C” or common wire brings 24 VAC power to the thermostat from the heating/cooling system. You will lose the "fan only" option at the stat. As I wrote above, Honeywell RTH9585WF is the successor of its best selling WiFi thermostat model Honeywell RTH9580WF (which is still available for purchase). How to Wire a Thermostat with no C-Wire. There was no C wire coming to the existing thermostat. Thermostatic Controls - Honeywell RTH6580WF, Two wire system - Hi all, Brand new this forum. And keep replacing it, if your home lacks a C-wire. In this really short video you will learn how to connect an unused wire so it can be used as your C wire, which in a lot of cases has solved the problem of a thermostat not working. Brand:Honeywell Product:Thermostats Model:RTH6580WF Page: 140 Page(s) Download (PDF, 4.26MB) Note: For opening this Honeywell Thermostat RTH6580WF User Manual, your computer need Adobe Reader. Well, yeah I know that the RTH9585 is the more beautiful but let’s face it, compared to the Nest 3 or Ecobee4, they both look pretty ugly!. We discuss next some options for adding a C wire. Some mechanical or battery operated thermostats may not have this wire connection. 99 ($2.85/oz) Comparing RTH9585WF vs RTH9580WF. It seems as though the wall transformer wires should be switched, no? have 3 wires going to thermostat red used-white used-blue not used. There is no C in control box just red and white 24volts each has TT letters over them. User rating, 4.6 out of 5 stars with 1160 reviews. Manufacturer Part No - RTH9585WF / RTH9585WF1004 / RTH9585WF1004/W The Honeywell Wi-Fi Smart Thermostat is a seven-day programmable thermostat that can be connected through your Wi-Fi network. 4. These Honeywell thermostats both connect directly to your 2.4 Ghz Wi-Fi router. Installed a honeywell c wire power adaptor but the Honeywell rth9585wf dose not power up. – … It is necessary for establishing a Wi-Fi connection to your home network. Can extra blue wire be jumped with red wire and use this as C wire. In this post, I will compare two Honeywell smart thermostats. no dice. If you are replacing an existing thermostat, it might not have a C wire connected to it. I have a 2 zone oil fired boiler with a 2 wire thermostat .Is it compatible with 9585 thermostat. The predecessor is more bulky, follows a conventional boxed design (not sleek, curves are not smoothed); whereas the newer model RTH9585WF is sleek, with smooth design on edges. What Is The C-Wire? I am trying to use an RTH8580WF with an ancient Singer furnace and a name-unknown A/C unit. The next t-stat, the Honeywell T87N1026 big dial model, needs no common wire. The Honeywell I'm trying to install needs a C wire… The included battery is an AAA size Lithium battery, but if yours arrives drained (like many do) you’ll need to replace it. If you have C-Wire install it simplifies the smart thermostat installation process. We have collected all the Honeywell thermostat manual sets in this article list, the following can find what you want. We use cookies to give you the best possible experience on our website. Honeywell RTH9580 no C wire I am trying to connect my Honeywell thermostat and when I was taking the wires off the old thermostat, I only have a w, y, g, r. Its only 4 wires that come from the furnace. The Honeywell RTH6580WF Wi-Fi 7-Day Programmable Thermostat is a very competitively priced programmable Wi-Fi thermostat. Add a C wire using the following tips and procedures. The wiring at the thermostat is normal - red to the R, and white to the W. Should I try swapping them? Again, no blue wire here. Since this t-stat’s functions are limited to simply controlling room temperature, it can “steal” enough power from the other wires to work. Contact us to do business with Honeywell or get help with a product or service. We tested out the Honeywell RTH9585WF1004 Smart Color Thermostat for six months to evaluate its performance, ease of use, features, and its ability to serve as a … Honeywell RTH9585WF1004/W Home Wi-Fi Smart Color Programmable Thermostat, Alexa Enabled, Pack of 1, Gray - System must contain a c-wire Visit the Honeywell Store 4.3 out of 5 stars 5,932 ratings C wire. The C-Wire Adapter allows you to easily add a wire at the equipment during Wi-Fi thermostat installations when a common wire is required – without having to run new wires. The C, or common, wire brings 24 VAC power to the thermostat. Provide a C Wire if None Exists WARNING ! It does lack a bit of the stylishness of some of the more expensive models, but it does has many of the features that they have. . Without one, this t-stat will not work in your setup. 2 months. I'm installing a new Honeywell Wi-Fi Smart Color Thermostat (RTH9585WF)replacing an old mercury thermostat. What about connect the C wire from the thermostat to the red wire coming off the wall transformer? Bottom Line 4.6/5. You need a “C” wire to power it up; FAQs How is the Honeywell RTH9585WF wiring diagram? Page 1 C-Wire Adapter Guide Only use the C-Wire Adapter if you previously answered No to Step 12 of the Installation Guide Online Guides honeywellhome.com...; Page 2: Read Before Installing Read before installing. First, you connect wires to the thermostat. Many older mechanical or battery operated thermostats do not require a C wire. If you use the green wire as a "c" wire you need to change it on the thermostat and in the air conditioner. How to Check if You Have a ‘C’ Wire. The C-Wire, or “common wire” enables the continuous flow of 24 VAC power to the thermostat. They are not battery powered. 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. Reasons for a Blank Screen on a Honeywell Thermostat. Overview This product replaces the need for a C-wire (common wire) to power a thermostat. Let's connect. The thermostats need to powered by a “c” wire. Given that you thermostat needs one. See the C Wire Addendum document included in this package for more information. Model: RTH9585WF SKU: 5845300. Just in stalled the Honeywell RTH9585WF , followed the wiring directions and the extra wire in the wall (happens to be Blue) and connected it to the C terminal in the stat and the furnace ( Gas/forced hot air & AC) The C terminal had another blue wire which heads outside to the air handler, which is winterized. If you see a wire of different color, say Yellow in the ‘C’ terminal of your current thermostat, most probably it should be your ‘C’ wire. Usually “C wire” or the Common Wire will be a blue coloured wire. my old thermostat only needed 2 wires, and the wiring to it was a harness that only had 3 (three) wires in it, 1 of which wasn't being used. They are surprisingly similar! If you cannot add a C wire, then return it for a refund. Read online Honeywell RTH6580WF User’s Manual pdf with better navigation.Printable and downloadable Honeywell RTH6580WF user guide pdf. Your thermostat is the control center for your HVAC system. It allows homeowners to program, monitor and manage from a … I am thinking about replacing my $10 bare-bones thermostat with a Honeywell Wifi unit RTH6580WF. I just Both of these wi-fi thermostats have a 1 year limited warranty on them. Honeywell claims it works without a C-wire, but reviews around the Internet say otherwise. Although there are some options available if you do not have a ‘C’ wire (see below), having one opens up a much greater choice. You don’t need to connect to a smart hub such as SmartThings but if you did it would allow you to do more. The Honeywell RTH9580WF internet thermostat must have a C wire to function. 4.6 (1,160) ... C WIRE In order to provide a C wire capability, Honeywell offers their " WIRE SAVER Model THP9045A " module. Today as i - Answered by a verified HVAC Technician. Find many great new & used options and get the best deals for Honeywell RTH6580WF Wi-Fi Smart Thermostat with "C" wire accessory - White at the best online prices at … The RTH9585WF and the RTH6580WF and you know what? Honeywell Smart Thermostat Wiring Instructions RTHWF The most “meaty” part of instaling a new thermostat, is correctly wiring it up. The Honeywell thermostat has been wired just as other thermostats only that you will need common or “C” wire to power the model. But there is no particular standard for thermostat wires, so it can be any color like Yellow, Brown, Green or any other color. The RTH9585WF should have a Rh/Rc jumper from the factory, if it is missing then you must add one. So the G wire here does control the HVAC fan. First things first, let’s take a look at the difference between the rth9585 and the rth6580. Then you go through the step-by-step setup process and your thermostat is ready to use. Has anyone used this and a question for Honeywell if they monitor this forum. The ‘C’ wire (short for ’Common’ wire) is the wire that actually provides the power to operate your thermostat. Ensure that there’s no power supply to any component before you begin. C-Wire is an power cable that provides current to smart thermostat devices. Used-Blue not used “meaty” part of instaling a new Honeywell Wi-Fi smart Color thermostat ( RTH9585WF replacing. Or battery operated thermostats may not have this wire connection thermostat to the to! Both connect directly to your home network to program, monitor and manage from a non-connected to a connected.... 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