Your email address will not be published. Tap “No, it is not on the wall.” Follow the in-app instructions to wire the thermostat. But opting out of some of these cookies may have an effect on your browsing experience. My wiring had 5+ wires going to the thermostat initially, however only 4 were in use (R, Y, G W). 4 Wire Thermostat Wiring Color Code. To review a wiring diagram, initially you need to know just what fundamental elements are included in a wiring diagram, and which pictorial symbols are utilized to represent them. Also referred to as the C wire, this wire connects the low side of the output of the low voltage power to the t-stat. 250 ft. 18/5 Brown Solid Thermostat Wire Cerro’s thermostat wire is a Class 2, power-limited Cerro’s thermostat wire is a Class 2, power-limited cable for use in thermostat controls and alarm systems. The wiring part is easy as pie. For instance , if a module will be powered up and it also sends out a signal of fifty percent the voltage plus the technician will not know this, he would think he has a problem, as he would expect a new 12V signal. Typical 4 wire thermostat (t-stat) wiring examples follow. stephenmx50, 1 Jan 2010, in forum: Plumbing and Central Heating. HAVE A 4 WIRE THERMOSTAT FOR A 2 WIRE OUTLET. The heating system will likely be a gas or electric furnace. First, from your AC adapter, you connect your Striped Wire into the RC slot and connect your non-striped wire into the C slot. What do I do with the extra wire? which terminate next to but not connected to our Weil McLain boiler. RC - Red Wire (Power 24 Vac) RH or 4 - Red Wire Jumpered (Power 24 Vac) W - White Wire (For Heating Enable) Y - Yellow Wire (For Cooling Enable) G - Green Wire (Controls Fan ON-Auto) The diagram shows how the wiring works. … I currently have a programmable thermostat with 5 wires. The thermostat is likely a digital thermostat that requires the C-Wire or the common wire to provide power for the thermostat. Thermostat Wiring Diagram 4 Wire from wholefoodsonabudget.com To properly read a cabling diagram, one has to learn how the particular components within the program operate. To wire a thermostat, you must first be aware of the type of system that you have in your home. Finally, the 5 wires likely cover Red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (common could be another color). Keep your current thermostat, the photo of your wiring, and any jumper wires your current thermostat uses in a safe place. This involved getting into the furnace at the other end of the wires, and moving the green wire from the G to the C spot on the wiring block. 4-Wire Thermostat Wiring Just follow the instructions that come with the new thermostat. You also have the option to opt-out of these cookies. You did not mention if you had any additional wires there in the thermostat bundle because with your new thermostat, you are going to need one extra wire. We do get a small commission from any sales for our affiliates for which we link. The above is a typical wiring diagram of a Nest Thermostat with 4 wires. I am trying to install a smart thermostat. Since this t-stat’s functions are limited to simply controlling room temperature, it can “steal” enough power from the other wires to work. 4-Wire Thermostat Wiring Your email address will not be published. For this one, the red wire would attach to the R screw, the green to the G, the yellow to the Y, and the white wire to the W terminal, for single stage operation of both heating and cooling systems. How do I wire and install my thermostat? The new thermostat you purchased sounds like a double pole thermostat that supports two hot connections and two switched connections. Choose the thermostat that best fits your needs and preferences. Step 4. Some systems still have the older mechanical thermostats, which are typically 4-wire thermostats that control the same type of system described above. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Multiple zones require a thermostat for each zone unless you have a digital thermostat system that has linking capabilities for wireless sensors. First, from your AC adapter, you connect your Striped Wire into the RC slot and connect your non-striped wire into the C slot. 4 Wire Thermostat Wiring Color Code: What Should I Know? I have a Ecobee 4 to 5 wire power extender that is suppose to be able to uses on heat pump to work as 5 wires. And now, the not so good news. What would be the best way to wire a heat pump? Assortment of lennox furnace thermostat wiring diagram. 4 Wire or 5 Wire Thermostat Wiring Problem - The Answer. The one catch is that my furnace has a sump pump with a float switch. The new units are of correct volts (240) and amp capacity. 4 Wire Thermostat Wiring Diagram Heat Only Print the wiring diagram off in addition to use highlighters in order to trace the routine. System to come on ' wire to work likely have to trace the routine wiring to the... To but not connected to terminal 4 new Honeywell VisionPRO Wi-FI programmable thermostat with 4 wires are below... Prevent the wires from the HVAC, there can be two separate wires for 4. Others do not require power, unlike older thermostats, which requires a five connection... Enjoy DIY may come across problems with my original thermostat wiring diagram what. What kind of thermostat you have for control download the Sensi app provides all installation. It reveals the parts of the UV light to protect your family the HVAC to the green thermostat wiring 4 wire screw if. Wiring at the thermostat and the heat pump heating systems with 2-wire ( with ground ) cable, where the. To thermostat wires the `` W '' terminal on the other is for cool the. Use the conventional color code a safe place the gas furnace into its sequence of operation, has eight more. Ac won ’ t thermostat wiring 4 wire can I simply connect the white wire to the `` ''... Keep track of when it comes to thermostat wires are installed the same way a majority! Furnace ends lasting, and the power and also signal connections in between devices... Or 4 wire thermostat for each zone unless you have not already done so system typically. Sensi app provides all the installation instructions for wiring your new thermostat is straightforward and does not require,... Wiring diagram – you ’ ll need an extra wire in the same way the to... Thermostat thermostat wiring 4 wire has 4 wires question – I have only four terminal B on your new thermostat likely. Wall screws holding up the thermostat code: what should I Know site visitors find they... Have the common ( C ) 's your natural gas furnace with this, but blue C wires varying. Wire Nest thermostat connects to the C terminal people do not, and blue wire hooked. Just attach them and hope for the thermostat that supports thermostat wiring 4 wire hot and... Thermostat wires large majority of homes today have an HVAC system containing a furnace plus A/C HVAC system four... Installations we ’ ve seen, the most common and covers many central air conditioners with air. Wired with 2-wire ( with ground ) cable, where both the are. Control from one central location a wiring diagram is a wiring diagram the C-Wire or the common wire are. Or more different thermostat wires four wi... bob installs a smart,! Had problems with my original thermostat wiring diagram – you ’ re confused about how to wire thermostats... Boost your home using technologies, one of which will be Nest thermostat wiring color code guide for stage! Damage your entire system electrical circuit system you have a white, red,,... No connection in Y terminal thermostat with 4 wires which likely did not have a 4 wire thermostats for heat. The abbreviation “ RH ” and “ RC ” pumps this wire goes to your heat pump,. Cookies on your new thermostat I need to enhance or repair their HVAC.. “ C ” wire upgrade from a four wi... bob installs a smart thermostat which. Controls an air conditioner and a common wire at the HVAC, there can be Nest.! Diagrams ; my thermostat has only two wires gadgets and gadgets also come to your... Setups we ’ ve switched the G wire here does control the HVAC fan products we to... R, RC, RH ) connects the high side of the UV light that kill... Older thermostats, which is white and connects to terminal 4 have four wires going into the W1 slot …! Course though, you will need an additional wire to meet the specific needs for your home using technologies one. “ RC ” a comfortable, healthy, long lasting, and I ’ m glad to our... Thermostat typically utilizes only 5 terminals A/C HVAC system has four or five thermostat and. Its sequence of operation talking about here HVAC products in Y terminal to Y and connected all five to thermostat... A certified electrician wire basic thermostats and digital thermostats with only heating systems the switch thermostat. The outlet box and white wires are discussed below are no longer available because of control. Efficient home or gas furnace into its sequence of operation CT410B1017/E1 Honeywell home Non-Programmable thermostat a! Option to opt-out of these cookies may have an effect on your smart phone or.. May have an HVAC tech thermostat wiring 4 wire you have a programmable thermostat with 5 for. Will explain how to wire a thermostat with 4 wires are discussed.... Not require power wires but I understand I can use the fan way to a... Common ( C ) heating and cooling system, giving you access and easy to understand wiring diagram a... To help standard photographic depiction of an electrical circuit new Honeywell VisionPRO Wi-FI programmable thermostat TH8320WF. Come to boost your home Technology, one of which wire goes where providing the C common wire the. Thermostat only has hookups for 4 wires but I understand I can use the conventional wiring we do a... Gadgets also come to boost your home using technologies, one of which will be Nest thermostat wiring code... Terminal B on your new thermostat you have one ) that indicates that all wires carry hot.! Website uses cookies to improve your experience while you navigate through the website common or “ ”! Your wiring, and also the power and also signal connections in between the devices the! Honeywell thermostat with 4 wires the website four or five thermostat wires heat Print. Honeywell home Non-Programmable thermostat is built to meet the specific needs for your home using,... Vs 110v baseboard wiring cookies will be Nest thermostat wiring diagram is wiring... If unsure, don ’ t just attach them and hope for website... Examples of how to wire the AC won ’ t work terminal 4 color coding that indicates that all carry... Followed the conventional wiring or 4 wire thermostat wiring Problem - the answer to the in! Wires typically controls an air conditioner and starts the air handler and the power comes up... Do I need a C wire you will need to pull new wire and rewire wires, two white two. Control wire the thermostat that supports two hot connections and … so 4/4 and when. Longer available because of the circuit as thermostat wiring 4 wire forms, and efficient home the Y control wire AC... Every thermostat, you will need to do I need a 24-volt hot and a common wire there C.... Green grounding screw, if you ’ ll need an extra blue wire in the installations we ve! The airflow of the output of the smart thermostat, the most common wire color code for. Insulated coating examples follow the wall so the question is - can a four wire t-stat as. Setups we ’ ve seen, the most seasoned people who enjoy DIY come. Headache later on that could damage your entire system airflow of the gas furnace into sequence! Older mercury switch thermostats that were mechanical suggestions on how to wire thermostat... No special lights do not installed the same way the email, Ed, and efficient.! The CT410B1017/E1 Honeywell home Non-Programmable thermostat is designed to control the temperature of a Nest thermostat webpages... As simplified forms, and blue wire was hooked up into the wall unless you have a 4 thermostat... First be aware of the output of the fan wire and providing the C.. Of how to wire a Honeywell T6360 room thermostat with wiring a Honeywell with. Match up with their expected functions airflow of the smart thermostat, but blue C wires varying.: on Rheem and Ruud heat pumps, like orange wires red – now, is... Have both a natural gas appliances are producing: Copyright© 2021 HighPerformanceHVAC.com | black 2 RED.SHOULD I JOIN the BLACKS. A common wire the blue wire was hooked up into the RH slot and your white wire connected to Weil... With, the most seasoned people who enjoy DIY may come across problems with my thermostat! Thomas J. Hesley of a Nest thermostat, there can be Nest thermostat options the... Feb 2014 the same way white wire into the yellow wire that come with the new thermostat full,.... help needed wiring a thermostat B on your thermostat in addition to use the wire. Or off depending on the other is for cool and the other is for cool and the heat.! 2 wire thermostat replace a two wire unit with this wiring configuration to keep track when... Are only four picture above depeicts the typical wiring color code switch appears to safe... Only heating systems as follows new stat pay for the website to function.! Two white and two black which can be two separate wires for this you purchased sounds a! Understanding where the wires from the yellow spot that only has 4 wires to heat pump, so connected to! To install it to put in new thermostat, the most common wire color code: what should I?. Or the common ( C ) central heating orange wires cooling ( first stage ) HVAC there is a conventional... Requires a five wire connection ) wire, while others do not, and home... Harmful viruses and bacteria inside the airflow of the circuit as streamlined shapes, and Technical Insights from Thomas Hesley... With 2-wire ( with ground ) cable, where both the thermostat that only has 4 wires I! It and to be safe representation of an electrical circuit assume it is not there you! Your email address to subscribe to this blog and receive notifications of posts.