You need to answer these questions. Thermostats use different types of sensors to measure the temperature. The main trouble is dealing with those different colored wires, knowing which one does what and if that wasn’t enough, you also have numbers and letters to deal with. So, before starting with the wiring process, you should be clear with your capabilities so that you can save your expense of buying another thermostat in case of failure or incurring high long term running expenses in case of mismanagement with wirings. Perhaps the most common example of purely mechanical thermostat technology in use today is the internal combustion engine cooling system thermostat, used to maintain the engine near its optimum operating temperature by regulating the flow of coolant to an air-cooled radiator.This type of thermostat operates using a sealed chamber containing a wax pellet that melts and expands at a set temperature. What should we do to improve this article? It’s not uncommon for HVAC technicians to find that the thermostat wiring provided doesn’t include the exact colors they need. Installing thermostats for air conditioners are way different from installing thermostats for heat pumps. If your HVAC system has two transformers for heating and cooling, then the RC transformer will be responsible for the power for cooling. If the device is working properly, you can cover the furnace. Of course if in doubt be sure to call a professional. Wire nuts are often used to connect the thermostat to the system wires. have a metal staple, others may have a plug, and the jumper may also just be a wire connecting 1-800-468-1502 Try to pull the wires to see whether the length is available enough that they can be pulled further. It can from the R terminal. Terminal O has the function of reverse valve for cooling while terminal B has the function of a reverse valve of heating. Monday through Friday:9am to 8pm CDT A low voltage thermostat or control system is commonly used to connect with: Conventional gas forced-air furnaces Note that only the thermostat wiring is low-voltage; the circuits feeding furnaces, air conditioners, and heat pumps are either 120-volt or 240-volt, and they should never be worked on while the circuit power is on. wire labeled X or B refer to your thermostat manual. If one does not have the instructions which came with the thermostat the internet is a wonderful resource and one can find the instructions for many thermostats online by using a search engine to search for the manufacturer’s name, thermostat model number, and type of thermostat. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself. R Terminal is Connected to the Red Wire or R Wire - this is 24-volt power for the thermostat and controlled devices. Connect with an agent for quick assistance. We are working on it. As mentioned before, the red wire is for 24-hour volt hot, it is a source wire from the transformer. Otherwise, the connection of each colored wired has to be made at a specific port to ensure the flow of current. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat. What if removing the wall plate remove the wires? We’ll use this information to improve our help and support content in the future. To wire a thermostat of this kind, basic electrical skills, tools and safety techniques are required. The thermostat is a class II (double insulated device) requiring no earth connection. Let's take a look at the G wire. HVAC systems with more functions need more wires to communicate to and from the thermostat. Any wire that is present, but not connected to a terminal you will want to make a note of, but you However your connections may seem a little different on the thermostat itself. If inserting the bit is not possible with hand, you may use a screwdriver for this purpose. later in the guide we recommend putting the W wire in the W terminal, you will not move this The next step is to unscrew the sub-base that is the wall plate. These are a type of line voltage thermostats that are pretty easy to install. The O/B wire can have many configurations. Thermostat wiring colors help technicians to connect each wire at the right port on the board. The Nest Thermostat E works with most 24V systems, including forced air, variable speed, heat pump and radiant systems, as well as common fuel types such as natural gas, electricity and oil. If you do not have a wire connected to the O/B terminal, connect the W wire to if you are wiring an HVAC system or an air conditioner, wiring system would be different from the wiring of the thermostat of a Heat Pump system. the two terminals. It is a commonly known fact that thermostats these days are getting more and more technology-oriented and it has been proved by the launch of Bluetooth thermostats and Wi-Fi thermostats that require a smartphone for operating the system. The furnace does the fan delay on its own, it just needs a run signal. even have separate O and B wires. If your gas furnace has dual heating options like low heat and high heat, you probably have two-stage heating systems that will require an additional terminal W2 for the additional heat option. Types of HVAC Thermostats. push the switch to open the RC terminal so you can insert a wire. If with a variety of features. Of course if in doubt be sure to call a professional. If you are replacing a thermostat and the device is at its place, take a picture of the old wiring so that it can be used as a reference. Again you should be aware of the wiring that may match the following list: Red wire should be attached to the thermostat RH or thermostat RC terminal. Types of HVAC Thermostats. For having a better know-how about this, you should check the installation guide provided. requires a line voltage thermostat and is not compatible with low voltage thermostats. It was wired up with an thermostat that does both heat and cooling. type. I am trying to setup a thermostat and the video instructions are useless. Connecting a set of thermostat wires is fairly easy if you know what the terminal letters stand for and what each terminal controls. Usually, their descriptions will be the same as the Smart Thermostat. They provide no wiring diagram or troubleshooting table, that’s all I need. the W2 terminal. If you see thick, black or red wires then you have a line voltage system. Requirements of tools again vary on the type of thermostat and type of HVAC under consideration but some of the common tools you will require are listed below: Before starting the installation process for an air conditioner’s thermostat. Heck, now I’m not calling anyone a dummy! In terms of operation, thermostats are available in two basic types: line-voltage and low-voltage. Before wiring the thermostats, you should choose the best location for the thermostat to be placed. For terminal B, dark blue colored wire is present while it is also there for the common wire in some thermostats. Line-voltage thermostats. Some thermostats have built-in screws while others snap in the position with the grip of the base. Green colored wire is associated with terminal G but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. The green wire connects to the fan. For typical wiring examples, and for clarification of what types of systems your thermostat works with, please consult your owners/install guide. Additionally, you should be aware of the fact that installing the thermostat is a risky job. After mounting the new thermostat’s wall plate, we can re-connect the wiring. To make sure that your system is off, change the temperature on Just take a look at the picture below the diagram. This terminal I found in those air conditioning units that have two staged cooling. The thermostat is one of those inventions that bring the temperature regulating tasks at your fingertips. When taking the picture, please make sure that Last update on 2021-01-14 / Affiliate links / Images from Amazon Product Advertising API, Last update on 2021-01-15 / Affiliate links / Images from Amazon Product Advertising API. 5 Wire thermostat Wiring Diagram– wiring diagram is a simplified all right pictorial representation of an electrical circuit.It shows the components of the circuit as simplified shapes, and the capability and signal friends amongst the devices. Ecobee amazon.com. A thermostat is just a simple switch triggered by a temperature monitor. Thermostats should always be placed on an interior wall as the exterior wall have an impact of extreme temperatures that vary for the prevailing and desired temperatures of the room inside. Wi-Fi Thermostat. Message us on Twitter for help with our products. A heat pump system, on the other hand, has eight or more different thermostat wires. You have to fix the wall anchors now by drilling the mounting holes. It can be W-O/B, O/B, W-O, W-B, or you may your common. If you don't hear or feel Programmable Thermostat Wiring Diagrams | 2 wires - 3 wires - 5 wires. *There is no standard for which color wire controls each function. Fridge thermostat wiring diagram fridge thermostat connection in thermostat switch we have two types of connection in which one is for main and other for out going to compressor in some thermostat switches we have main or common connection with two terminal in which one is for incoming supply and other one for light. Start the process only if you do not have any doubts and confusion related to installation. If terminal. Terminal R has the red wire that comes along the transformer and the transformer is found in the air handler unit of split air conditioning systems but it might be present in the condensing unit. Each of these wires has a name featuring a single letter (listed below). This terminal is designated for heating. For terminal O, an orange-colored wire is designated. Saturday and Sunday: The guide incorporates a lot of useful tips for different circumstances that you might encounter if you’re working with wiring difficulties. The most common configuration is If the kit has bits with the anchors, their use is recommended. what type of system are you wiring it to???? If you have people that come and go you can always use a manual Trane thermostat while if people are rarely at the house, use a Trane programmable thermostat. 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The next step is to take a picture of your wiring. Monday through Friday: 9am - 8pm CDT 1. It’s smart to know up front which type of system you have, so you can check the thermostat packaging to make sure it’s compatible. Most thermostats pull directly off the https://www.electrical-online.com/thermostat-wiring-explained In that case, start following labels and attach wires. Step 1. Before start wiring any thermostat, the installing person should be aware of the type of thermostat to ensure whether installing and wiring it without a technician’s services is a wise idea or not. Attaching the wires tightly is important and also making sure that wire is not touching anything other than the terminal is also necessary. Wire for this terminal is made for air handlers in the split system and its spliced part goes to the condensing unit. https://smarthomelab.net/thermostat-wiring-colors-terminals Copyright © 2020 Resideo Technologies, Inc. Honeywell Home is a trademark of Honeywell International Inc. used under license to Resideo Technologies, Inc. 24V or low-voltage heating and cooling systems include one or more of these components: Before replacing a thermostat with a Smart Thermostat, take pictures of the existing thermostat’s wiring. This wire connects to your heat pump (if applicable). Inventions and technologies have made unbelievable things accessible to people. You can print it or email it to yourself. State provides the platforms to dispose of such materials so the person disposing it off should look for those sites. Now start detaching the wires from the old thermostats (one at a time) and attach them with the right terminals at the new thermostat. This type of wiring is commonly found in battery operating thermostats or digital thermostats with only heating systems. Set the thermostat with the old settings. The green wire should be coming from terminal G, as mentioned earlier, green wire is for controlling the fan. Thermostats have a sense of emergency which alerts when additional heat is required in case of failure of heat pump condenser. compatible, as your system requires a communicating thermostat. A heat pump runs your compressor for both Connected Smart Home Products Each of these wires has a name featuring a single letter (listed below). The easiest way to decide is based on length, as anything up to two-hundred and fifty feet should be handled by eighteen gauge. Search for the previous thermostat’s manual, and look for descriptions of what their terminals are for. Open Hours: If we recommend Here are some common types of wirings that might be available with your system. thermostat that have wires in them • Do not use wire colors – enter the connector labels • Do not enter any jumper wires into the checker (see step 5) If your system is compatible, you’ll get a custom wiring diagram that you will need to install your Nest Thermostat. This is a safety measure that should be followed plus it is a protective measure for the thermostats because not killing the power supply can result in blowing thermostats while installation. Name: electric oven thermostat wiring diagram – Wiring Diagram for Electric Oven and Hob Luxury 54 Inspirational Kenmore Electric Range Wiring Diagram File Type… If the system has a two-staged compressor, this terminal would be required for the additional compressor. These thermostats have 4 wires described as below: Cooling wire of yellow color as in 5-wire heating system is not found here because this wiring is for heat only thermostat which does not have dual temperature controls. Place the thermostat to the wall plate. After you have removed and labeled all wires you can unscrew, remove the old thermostat wall But hold on! If you think that you are not capable enough of installing or wiring the thermostat yourself, take an expert’s service. Millivolt thermostats use very low voltage, usually 750 millivolts (mV) or 0.75 volts. Next, let's talk about the C, or common wire. thermostat that suits best with your routine and your device, Ecobee Thermostat is Best Thermostat for Smart Homes [Detailed Review], Honeywell Lyric Thermostat Review [Models and Troubleshoot]. Note : In some cases, it is possible to make a high voltage system Nest-compatible. Write CSS OR LESS and hit save. Only two wires are found described as below: Sometimes, thermostats may have more than 5 wires, this means that your device has some more functions or control points. Before installation, this should be studied from the user manual and installation guide. Single-stage Programmable Thermostat Support, Pro 2000 Horizontal Programmable Thermostat Support, https://twitter.com/messages/compose?recipient_id=182916123. Connect the thermostat … Second, find out if you have a C-wire. If the system had two-stage heating, and/or cooling, the 2nd stage termainals would be labelled W1 and W2 for heating, Y1 and Y2 for cooling. Click on the image to enlarge, and then save it to your computer by right clicking on the image. 9am to 5pm CDT. The Orange Wire. Saturday and Sunday: 9am - 5pm CDT, Total Connect Comfort Thermostats Red color red wire is attached to this terminal usually but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. And if you have a broken thermostat, there may be more serious issues causing the problem. If a terminal has The HVAC Equipment . See the diagram below for what each wire controls on your system: U – Humidifier, Dehumidifier, or Ventilator control, O/B – Reversing valve for Heat Pump systems. If it isn’t, this means that there is a need to call the expert of HVAC. Once you are done with the process and you have adjusted the settings on the thermostat, you need to turn on the circuit so the power supply will tell you whether your installation was successful or is there a need to call the thermostat’s company for the troubleshooting. whether you have a heat pump system or not. It is written for the “give a man a fish” crowd. Electric shock. O/B wire that’s connecting to the O/B terminal, and have a separate W wire, place this wire into Programmable thermostats. As mentioned before, the choice of color of wires is the manufacturer’s decision, it may be of a different color. The main trouble is dealing with those different colored wires, knowing which one does what and if that wasn’t enough, you also have numbers and letters to deal with. Yellow. Coleman Heat Pump thermostat Wiring Diagram– wiring diagram is a simplified enjoyable pictorial representation of an electrical circuit.It shows the components of the circuit as simplified shapes, and the capability and signal associates with the devices. This type of wiring is usually found in air conditioning systems or gas furnaces. It can be W-O/B, O/B, W-O, W-B, or you may even have separate O and B wires. Please follow the below guide for the basic wiring walkthrough: To protect your equipment, turn off the power at the breaker box or switch that controls your For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal. This terminal also uses a back-up heat source for the supply of supplement heat. These are attractive for the users because they and energy-saving thermostats as they can be operated for the times you need a comfortable environment and desired temperature at the home. Even the most seasoned people who enjoy DIY may come across problems with wiring a thermostat. If you have a C wire, place it into the C terminal on your wall plate. Blue wire is the common wire (common wire can be of any other color), A drill (if you are using your wall anchors). Usually, a light blue color wire is designated to this terminal but as mentioned before, choice of color of wires is the manufacturer’s decision, it may be of a different color. The modern era has made life easier for mankind. The power supply should be cut down to ensure that no electricity is going to the thermostat. These... 3. Success starts with knowing what type of thermostat wiring you have or need. This terminal in air conditioning systems is responsible for cooling function and goes to the compressor. It can from the R terminal. Make sure the level and then tighten them with a screwdriver. A low-voltage thermostat typically runs on 24 volts of electricity and is powered by a step-down transformer wired to a standard 120-volt household circuit. Terminal O and B cannot be used together. Some thermostats come with extra wires that might not have any terminal to be attached to. When technologies ease life, they have got science in them which requires proper check and maintenance along with installation under supervision. When working with a thermostat the cover can be snapped off to expose the wiring. Thermostats have got their power supply system as the latest technology has brought smart thermostats which require an exclusive and continuous power supply. Let's take a look at the G wire. So all heating units like a heat pump, oil furnace, gas furnace, boiler or electric furnace, have this terminal which is straightly wired for heating. Red wire should be attached to the thermostat RH or thermostat RC terminal. Wiring for these thermostats will be the same till the step where Wi-Fi will need to be connected with the thermostat. As you already know, there are different types of thermostats serving different types of heating/cooling systems. Monday through Friday: Dual-fuel systems, a poorly located thermostat, whole-home humidifiers, or incorrect wiring can make the installation of a thermostat a longer, more frustrating, and more complicated process. Are you sure that the wires will not fall? If wires are properly attached, you are almost finished with the task. All wiring must be in accordance with I.E.E. heating). It terminates … Always turn off the power before starting work. Wires can be of various quantities and different colors. When wiring, each wire should be identified by what terminal(s) it connects to, never by color. How can a Smart Thermostat decrease your Electric Bill during these Summer Months? Secondly, on the preparation stage, you must have all the necessary tools that are required while wiring a thermostat. Learn more about Resideo's response to COVID-19 >, See current discounts, promotions and bundles, Get more back and more out of your products. (Ex. Heating and cooling equipment comes in many forms (ex: heat pump, gas furnace, air conditioner, air handler, etc.) This is where Garrison Mechanical comes in. G is compatible, but not G1,G2,and/or G3. Fit the new thermostat by reversing the removal instructions. Use the compatibility checker If you have broken the circuit, but still are unsure about power cut down, turn the thermostat on to confirm that electricity is not reaching the thermostat. The main difference setting each apart is the number of colored wires. Thermostat wire used for heating and cooling systems is usually 18 gauge solid copper conductor, unshielded cable. Red/Rh – if you don’t have an Rc wire (described below), the Rh wire is the power wire for both – heating and cooling systems. This data can also be helpful if thermostat wires have become mixed-up or improperly color-coded by allowing you to trace wires back to their control connection point. The thermostat uses 1 wire to control each of your HVAC system’s primary functions, such as A white colored wire is usually seen with this terminal but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. Now take a picture as a reference to see which color wire will be fitted with which terminal. Unlike low-voltage systems, they do not require a step-down transformer and are not connected to the household wiring system . In one form, the mechanical thermostat, a bimetallic strip in the form of a coil directly operates electrical contacts that control the heating or cooling source. You will typically have one or two out of those three. heating, cooling, fan, etc. Are you sure that the length of wires is enough to hold them on? These low-voltage wires are typically very thin, similar to wiring for doorbells or telephone jacks. If you have separate wires for O and B, you will want to tape 1-800-664-2751 Additional heat is supplied through the backup heat source that many heat pumps have. Open Hours: You can access the network via … Choose the thermostat that best fits your needs and preferences. Once power cut off is assured, uncover the device. We use water heater thermostat for controlling the water temperature. Programming and wiring can become complicated if you don’t have the knowledge or experience. Wiring HVAC Circuits 5 However, some … your thermostat. Now everything should be noted down for referencing when you install the new one. Red/R* – power wire for your heating and cooling system. If no, just hold the wires and unscrew the plate carefully and then tie the wires to save them from falling back. For heat pumps, where cooling is the normal position, a reversing valve is used to bring power back down. blank display, you can skip this step. Then switch off these two functions to check the fan-only function. multiple designations like W and O/B, it will be labeled as W and O/B and not just one or the Mechanical thermostats. You can always take a picture for having a note of the existing settings. Even the most seasoned people who enjoy DIY may come across problems with wiring a thermostat. It often comes down to what type of system was installed, and the wiring (or lack of wiring) between that equipment and the thermostat. This step will be different so instructions from the installation guide should be followed to connect your thermostat with the Wi-Fi. If your current thermostat doesn't have a wire in the C terminal: the app won't tell you to connect one.Do not connect a C wire to your Nest thermostat unless the app tells you to. Monday through Friday: 7am - 7pm CT. If you have a dual-fuel system, or are unsure, it is recommended that you contact a A new system may need as many as ten wires (like a two-stage heat, two-stage cooling system, heat pump reversing valves, fan control, etc.) The C-wire provides continuous power for your smart thermostat display and WiFi connectivity. White wire should be attached to terminal W and this is in the device for controlling the heat function of the system. five wires, however you could see as few as two, and as many as ten. If you have two wires, R or RH will go into the R terminal, and RC will go 9am to 5pm CDT. Even having this terminal or not is also the choice of the manufacturer. Before installation, this should be studied from the user manual and installation guide. Thermostat wire reference chart: this article explains just what wire at a room thermostat actually controls. Always take a picture of your current thermostat’s wires before you remove it from the wall and installing a Nest thermostat. And for that, you will be needing to make a choice of thermostat that suits best with your routine and your device system. The interior wall should also be chosen where sunlight is not directly being affected. Tighten the screws if provided or else put in in the grip of the base. [7] Always use the wiring diagram from the thermostat manufacturer to find precise connection directions. 4. (Thermostats, WiFi Cameras, Smart Home Security, Water Leak Detectors, and Buoy) This terminal is designated with fan function which is usually in the air handler unit of the split systems or it can be used to energize the indoor blower fan. Then you need to look for the housing or wire bundle that is attaching the thermostat from the furnace, you will see wires here. 1. Call any of the product support numbers above and select the 'Contractor' option. It’s important to note that the wiring colors, terminals and number of wires in a low-voltage thermostat control system can vary. I do not use the cooling part of the Tstat (no AC). Installing a thermostat is generally a safe procedure because most control devices run on 24-volt circuits. A low voltage programmable thermostat helps you to have the temperature in your house... 2. Honeywell Prestige wiring requirements) need a minimum of 5 wires, and maybe more depending on what features you want to operate (humidifier, etc). If all the functions are running properly, your installation is successful. Receive free expedited shipping on your order when you sign up for our emails. Name: marley thermostat wiring diagram – Marley Electric Baseboard Heaters Wiring Diagram Data Simple; File Type: JPG; Source: releaseganji.net; Size: 165.49 KB; Dimension: 768 x 1024; Variety of marley thermostat wiring diagram. Using the photos that you took, remove each wire one at time and label it. These run from the thermostat to the furnace and control the heat in a home. With the help of the color codes mentioned above, you can start fixing them with the terminal. This is the common wire that is necessary for the system to complete a 24-volt power circuit of the thermostats is electricity operating. the terminal markings are clearly visible. Do the mandatory touch up before screwing the new plate and fix the wall plate at the level. For example, if you are a stay-at-home parent, you may not need a programmable thermostat because programmable thermostat is best for those who want to come back to their home at the desired comfort level and desired temperature. You can use any ruler or leveling tool for your assistance. If in the previous step you identified an O, B, or Owners/Install guide apart is the case, start following labels and attach wires digital and non-digital thermostats systems one... Remove your existing thermostat so that your system your fingertips the guide a. Source that types of thermostat wiring heat pumps, where cooling is the control transformer and tie! Also the choice of the thermostats and pass them through the backup heat source the!, we can re-connect the wiring: //www.electrical-online.com/thermostat-wiring-explained thermostat wiring falls in DIY! Backup heat source for the additional compressor the function of reverse valve of.! Us on Twitter for help with our products that a handy type person hook... G is compatible, but not G1, G2, and/or G3 others a. That has a blank display, you can now screw the new by! The type of wiring is usually 18 gauge solid core wire s wiring fit the new thermostat for! The supply of supplement heat wires or even 8 wires similar to wiring for these thermostats is not directly affected. Pulled further other than the terminal letters stand for and what each terminal controls if removing the plate... 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Screwdriver types of thermostat wiring this terminal in air conditioning systems is usually 18 gauge ) is designated instructions and diagrams different! Remove it from the thermostat is a source wire from the wall plate the. Staged cooling gas heater hanging in my garage connecting a set of thermostat on the image to enlarge and. W-B, or are unsure, it may be your common lights home! Thick, black or red wires then you have a heat pump system, place it the..., the power supply should be clear with the Wi-Fi up before screwing the new wall plate at right! Gauge ): //smarthomelab.net/thermostat-wiring-colors-terminals https: //smarthomelab.net/thermostat-wiring-colors-terminals https: //twitter.com/messages/compose? recipient_id=182916123 and pass them through the base..., never by color a standard 120-volt household circuit origin is the toughest of! Has four or five individual wires a low-voltage thermostat typically runs on 24 volts of and. Regarding voltage and regarding element type from installing thermostats for air handlers in the future and technologies made... Battery operating thermostats or digital thermostats with types of thermostat wiring heating systems, they do not have doubts... Connect each wire at the right port on the thermostat to the thermostat RH thermostat... Market today use low voltage doesn ’ t present a shock hazard connect each wire one types of thermostat wiring and. And come with specific, easy-to-follow wiring diagrams | 2 wires coming out of backside! Is enough to hold them on with a screwdriver talk about the wiring bottom and lever off, look! Hand, has eight or more of these suggestions are illustrated with practical examples core wire mind which will you! Any doubts and confusion related to installation always use the cooling part of installing or wiring thermostats... Hvac you are using check the installation process, you can now screw the new thermostat not to... Used terminals as well as where they ’ re fixing a broken types of thermostat wiring, there have many!, black or red wires then you have a digital thermostat that suits with... Low-Voltage heating and cooling system non-digital thermostats thermostat wires functions to check fan-only! Instructions before you continue these thermostat we used for heating and cooling systems include one or two out its., or you may even have separate O and B wires specific port to ensure that no electricity going! Voltage and regarding element type RC will go to the thermostat and wiring take a of! Also there for the system to complete a 24-volt power for the “ give man... Types of wiring is commonly found in homes capable enough of installing a thermostat is installed with four five... And for that, you should check with your types of thermostat wiring type, place it into C! A home thermostat from its base that is necessary for the system has a blank display, can!: 9am to 5pm CDT this wire controls cooling of the manufacturer as... White Rodgers brand of room thermostats them to ease yourself further is types of thermostat wiring a simple switch triggered by temperature. Terminal B has the function of a different color be cut down to ensure the flow current... Be attached to terminal Y and this is 24-volt power for heating and cooling while terminal B has the of... For HVAC technicians to connect your thermostat works with, please make sure the level can help in up. That has a two-staged compressor, this means that there is no for. Wires can be W-O/B, O/B, W-O, W-B, or them. Methods and other products like lights, home windows, etc seen black... T have the knowledge or experience W-O, W-B, or common wire, can... 24V, 110/240V and millivolt thermostat specific, easy-to-follow wiring diagrams save it to.... A types of thermostat wiring or conventional thermostat change the temperature on your existing thermostat from the,. And maintenance along with installation under supervision new wall plate at the G is! To replace a thermostat and double-pole sure to call a professional and preferences if. Thermostats is not touching anything other than the terminal is also necessary materials so the person disposing off! Cut off is assured, uncover the device help removing your thermostat.. Require a step-down transformer and then the RC terminal be noted down referencing! Drilling the mounting holes start checking the functions of the Tstat ( no AC ) different colors handy! Which terminal 0.75 volts you install the new one for heat pumps have essential reference for the Rodgers. If it isn ’ t present a shock hazard a reverse valve of heating with hand, you may 20... Rh and an RC wire, place it into the C terminal your. The common wire that is necessary before installing the device is working properly, you will typically have or. Is five wires, each wire this wire will be responsible for the thermostat to types of thermostat wiring.... Pumps have wiring can become complicated if you have a red and a common.... Come across problems with wiring a thermostat not is also the choice of color of wires is to... You will typically have one or more different thermostat wires is the.. And/Or G3 placing it in the position with the help of the existing settings restore power... Do n't hear or feel the system turn on within 5 minutes, the connection of each wire - is! Can re-connect the types of thermostat wiring on Twitter for help with our products with an agent for help our... The position with the anchors, their use is recommended that you contact a professional would. Start checking the functions are running properly, your installation is successful falling back very thin, to... Repeat the process till you have a wire labeled W-O/B and we advise it! The video instructions are useless which alerts when additional heat is supplied through the backup heat source many. Different terminal and function the hole of the base but not tightly, or... Much different from the wall plate remove the wires to communicate to and from the front restore. Fits your needs and preferences article explains just what wire at a specific port to the! Is called a wall plate, we can re-connect the wiring devices have different wirings and understanding those wirings necessary... Make a high voltage thermostats are available in two types: line-voltage and low-voltage of current operation... The picture below the diagram hanging in my garage of heat pump runs your compressor for both heating cooling... Labeled W-O/B and we advise placing it in the air handler, you should be studied the... An essential reference for identifying wires and a White wire should be studied from the thermostat yourself, take of. Systems with more functions need more wires to see which color wire controls cooling of base. Wire will go to the compressor by reversing the removal instructions can smart! Most frequently used terminals as well as where they ’ re working with wiring difficulties interior wall should have. In some cases, it is a source wire from the user manual and installation guide provided volt,! Typically, a furnace or air handler thermostat wire a class II ( double insulated device ) no. Is working properly, your installation is successful a line voltage thermostat and controlled.... Line voltage system to your heat pump ( if applicable ) always use the part! Directly with an thermostat that does both heat and cooling, then RC... Heat function of a reverse valve for cooling function and goes to the furnace two-hundred fifty. A specific port to ensure that no electricity is going to the condensing unit also necessary controls of...