thermostat wiring color code

If not, the structure won’t work as it should be. (It’s important to determine that your heat pump is compatible with your thermostat before you decide.). Multi-stage systems can require up to 8 conductors because of the amount of communication needed between the thermostat and air handler or furnace. Connecting a set of thermostat wires is fairly easy if you know what the terminal letters stand for and what each terminal controls. Back in the olden days, thermostats were simple on/off devices that didn't need their own continuous power supply. Thermostat Wiring and Wire Color Chart – Thermostat Wiring Colors Code be a gas or oil furnace, electric furnace, or boiler or auxiliary heating for a heat pump. C – 24 VAC Common (You might see blue, purple, or brown typically used for this wire). It terminates at the air handler or furnace. It has 5 different color wires, each for a different terminal and function. Basic thermostat wiring ac condensing unit wiring diagram luxpro thermostat wiring color code ac thermostat wiring diagram ac low voltage wiring diagram programmable thermostat wiring color code rj45 rj11 wiring color code furnace wiring color code 8.6.drk-ov-roden.de Orange In either case, it is important to find the wiring diagram for the unit. RC - Red Wire (Power 24 Vac) RH or 4 - Red Wire Jumpered (Power 24 Vac) Only after you’ve done this, disconnect the thermostat for replacing. The orange wire connects to terminal O on your thermostat. The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. Wiring Set-Up Explained. Color codes for 24V thermostat wires are divided into two groups: - we give a summary tables of both traditional and current thermostat wire color code keys above The 5 universal base colors for thermostat wires which are, in order of frequency of use, red, white, green, yellow, and black. GDA622**S GDA622**S (GDA622--S) Analog Output Module, 2 channels, 1-5V, 4-20 mA output, 12 $760.00: MDR-40-12 MDR-40-12 12Vdc 3.33A Din Rail Power supply All you need to know about thermostat wiring including thermostat wires color codes, wiring diagrams, and videos to make your DIY easier. Thermostat Wiring Colors Code - Always follow the thermostat manufacturers This wire goes to outside heat pump condenser where the reversing valve is located. Understanding thermostat wiring colors is the next step. Below are several of the leading illustrations we get from different sources, we hope these photos will certainly be useful to you, and hopefully extremely pertinent to just what you desire about the Rv Thermostat Wiring Diagram is. As shown in the diagram, you will need to power up the thermostat and the 24V AC power is connected to the R and C terminals. Thermostat Terminal Designation: Color of Wire and Termination*: R - The R terminal is the power for the thermostat. Thermostat Terminal Designations Quick Guide - Detail Wiring Color Guide Below. If you decide to get rid of your outdated thermostat for a smart or wifi thermostat, be sure to mark the wires to indicate which color letter on the board they are connected to. Connecting a set of thermostat wires is fairly easy if you know what the terminal letters stand for and what each terminal controls. 4 Wire Thermostat Wiring Color Code Wiring Diagram A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. Rh wires: Industry standard for geothermal heat pumps. The yellow wires underneath your thermostat connect to your compressor. Ac Thermostat Wiring Diagram – ac thermostat wiring diagram, air conditioner thermostat wiring diagram, air conditioner thermostat wiring diagram pdf, Every electric arrangement is composed of various distinct parts. A heat pump system, on the other hand, has eight or more different thermostat wires. I have created the chart below to help you determine the common terminals you should expect in a thermostat and the respective color codes that are connected to them. This comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Every color translates to a specific port on the thermostat board. C is known as the common terminal. This type of wiring is usually found in air conditioning systems or gas furnaces. An important thing to note is that the actual instructions for wiring thermostats is really a ‘cheat sheet’. Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices. These wires only connect to your cooling system. Always turn the power off The white wire connects to terminal W in industry-standard thermostats. I need a wiring diagram (color code) for an old Lennox thermostat model 51H3601 - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. Consult a professional with wiring questions to avoid damaging the thermostat … This wire connects to terminal B on your thermostat. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Basic Thermostat Wiring Colors - Air Conditioner Systems - Always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. Thermostat wire color guide Colors and their usages vary by system and installation – there is no standard, and furnaces/thermostats don’t enforce the usage of one color over another. If changing out a Trane thermostat, just mark the wires and replace them where they came off. Blue wires are for heat pumps, like orange wires. Mentioned below are the most frequently used terminals as well as where they’re located. RV thermostats are connected to the machines they control using the same color-coded wiring harness as is used in conventional homes. Not all thermostats have all these connection points, so you just have to follow the connection points of your particular unit. Most thermostat wiring uses conventional codes for each wire. Orange – This wire connects to your heat pump (if you have one). Connect the thermostat wires. As far as a thermostat or furnace is concerned, all the copper wires in the bundle are exactly the same. Nest Wiring Color Diagram – nest wiring color diagram, Technology makes a much better life and it is true. Read on for information about all possible thermostat wires. If installing a thermostat from the beginning, the wires are normally color coded. Yellow. Wiring A Thermostat For Dummies. Homeowners with geothermal heat pumps have no use for the orange wire. Wire helps transmit data over a longer distance. Single-stage ones use a five-wire system, with one optional sixth. I looked online, and Lennox has been using non-standard Letter/Color codes for years. Blue or “C” wires. The orange thermostat wire links to your heat pump, if you have one. An important thing to note is that the actual instructions for wiring thermostats is really a ‘cheat sheet’. See also How To Connect & Setup A Nest Thermostat To Function As A Humidistat – Nest Wiring Diagram 8 Wire from Nest Wiring … 4 Wire Thermostat Wiring Color Code Wiring Diagram A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. 2019-05-14: Tuned the targeting for ‘4 Wire Thermostat Wiring Color Code’, removed ad code, and added tags. Modern thermostats with Wi-Fi and backlit display, by contrast, need a steady supply of juice.The C wire, or "common wire" enables the continuous flow of 24 VAC power to the thermo Make it a point to print out the color guidelines and you will have everything you need to finish the wiring. Typically, a furnace plus A/C HVAC system has four or five thermostat wires and a common wire. This thermostat wire color code will help homeowners understand the anatomy of their thermostat: White wires. Thermostat Wiring color codes. Heat pump thermostat wiring color code. These two connections will ensure that there is power to the thermostat that you are operating. Most thermostats follow the standard lettering system shown here, but be aware that the terminals, wiring colors, or the number of wires included in low-voltage cabling for thermostats are not universal. Wiring A Thermostat For Dummies. Read reviews and find the best prices on Amazon.com. Modern thermostats with Wi-Fi and backlit display, by contrast, need a steady supply of juice.The C wire, or "common wire" enables the continuous flow of 24 VAC power to the thermo From the looks of your wiring and if they went by the normal wire color code of how heat pump wires should be wired then you should be able to get your thermostat wired correctly. Y2-Wire - … Ac Thermostat Wiring Color Code . The 5 strands of wire provide enough functions for the modern thermostat. Heat pump thermostat wiring - A typical wire color and terminal diagram. Thermostat Wiring Color Code. Thermostat wire is made of multiple strands of solid copper wire, each wrapped individually with a colored shell and enclosed together inside a protective sheathing. RV thermostats are connected to the machines they control using the same color-coded wiring harness as is used in conventional homes. It can be a bit confusing to see both a Y1 and a Y2 label on some of the newer models, but just use Y1 and ignore the Y2 if all you have is one stage cooling. The Honeywell RTHWF/W Wi-Fi Smart Color Programmable Thermostat offers the best of both worlds in performance and versatility by utilizing. Rc wires connect to the RC terminals on your thermostat. Make it a point to print out the color guidelines and you will have everything you need to finish the wiring. Yellow wires. For simple heating applications, a 2 conductor wire is sufficient. Failure to properly link these can lead to failures in the system, including short … Thermostat Wiring and Wire Color Chart. Red wires, specifically Rc wires, are responsible for 24-hour volt AC power from your transformer. The larger 18 ga. wire helps transmit data over a longer distance. Call (855) 679-0011 or request an appointment online to get started. RH-Wire - connects to RH terminal. As shown in the diagram, you will need to power up the thermostat and the 24V AC power is connected to the R and C terminals. HVAC systems with more functions need more wires to communicate to and from the thermostat. Orange wires. Thermostat Wiring and Wire Color Chart. Most thermostat wiring uses conventional codes for each wire. This could happen if the wires are swapped on both ends or if there’s a spice in the wire somewhere that was not matched up to the correct color. Since it indicates the main power supply, red is also referred to as a “hot” wire. If the new thermostat doesn't have as many terminals as the old, it may not work. Aire Serv can help homeowners with all thermostat and HVAC needs. Thermostat wire color guide Colors and their usages vary by system and installation – there is no standard, and furnaces/thermostats don’t enforce the usage of one color over another. Thermostat wiring color codes. If you need help installing your new thermostat, Aire Serv® is here to help you get it right. The color of wire r is usually red and c is black. Allows the fan to be run independently of whether or not actually heating or cooling is called for by the t-stat. There are a variety of thermostat wire types. It’s important to note that in some cases the color of the wire does not necessarily mean it connects to that came color one the board. Conventional heating, air conditioning and heat pump thermostat wiring labels, wicolor codes and the corresponding function description The Rh wire, another type of red wire, is also responsible for 24-hour volt power from your transformer. Sophisticated gadgets and apparatus also come to improve your home with technology, among which will be Nest thermostat. Generally 24VAC Yellow – The yellow wire connects to your compressor. The white wire connects to your heat. The Basic Colors. Consult a professional with wiring questions to avoid damaging the thermostat or heating/cooling system. Turns on the circulating fan in most forced air heating and cooling systems. From the looks of your wiring and if they went by the normal wire color code of how heat pump wires should be wired then you should be able to get your thermostat wired correctly. The white wire connects to your heat. Thermostat Terminal Designation: Color of Wire and Termination*: R - The R terminal is the power for the thermostat. 2020-05-21: Tweaked the optimizations. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Blue wires are also called “C” wires because they are the Common wire. G – This is the terminal used for the fan relay to energize the indoor blower fan.COMFORTNET CTK04 SYSTEM INSTALLATION MANUAL Pdf Download.Thermostat Wiring for Dummies – How Anyone Can Do It. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. The system will not operate correctly if the wires are incorrectly connected. Y-Wire - connects to the Y terminal and is for cooling stage 1. 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. Nest Wiring Color Diagram – nest wiring color diagram, Technology makes a much better life and it is true. It gets connected to the R terminal on the transformer. Single-stage ones use a five-wire system, with one optional sixth. These color codes are vitally important in connecting the right wires to the corresponding terminals. For the thermostat wiring colors code for this terminal (if equipped) consult with the installer or trace the wire out to the source. Thermostat Wiring Color Code Typically, a furnace plus A/C HVAC system has four or five thermostat wires and a common wire. This thermostat wire color code will help homeowners understand the anatomy of their thermostat: Make sure you know what’s happening underneath your thermostat! I obtained a Hunter 43855 programmable thermostat (to preserve the compressor and save energy) and the terminal designation do not match what is in the instruction manual. Heat Pump Thermostat Wire Color Code – Youtube – Nest Wiring Diagram 8 Wire Uploaded by Bang Mus on Thursday, February 7th, 2019 in category Nest Wiring Diagram. We recommend to always work with the labels instead of colors, but they do go missing much more frequently than colors of the wires! The basic Heat + A/C System thermostat typically utilizes only 5 terminals. Most modern wifi thermostats have a straight connection, however some still require a small hook shape to be formed on the end. The Rh wire connects to your heating system as opposed to your cooling system. Every color translates to a specific port on the thermostat board. Thermostat wiring color codes. 2020-05-21: Tweaked the optimizations. Therefore, here’s the color to label diagram for a typical thermostat: Red (R) – Power for the thermostat. Am I compatible with ecobee? The main difference setting each apart is the number of colored wires. A heat pump system, on the other hand, has eight or more different thermostat wires. To install your unit, you’ll need to connect the correct wires to the terminals on the back of your new thermostat. Thermostat Signals and Color Code, from Xtronics.com ; Thermostat Wiring for Dummies, from ThermostatCenter.com Revision History. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat. Mentioned below are the most frequently used terminals as well as where they’re located. Red indicates a live wire. Heat pump thermostat wiring color code. Thermostat Wiring Color Code Chart; Share this: Click to share on Twitter (Opens in new window) Click to share on Facebook (Opens in new window) Related. Your health and safety are our highest priority during this time. Read reviews and find the best prices on Amazon.com. Most thermostats follow the standard lettering system shown here, but be aware that the terminals, wiring colors, or the number of wires included in low-voltage cabling for thermostats are not universal. The most common benefit of having 5 conductors is being equipped with a common wire, known as the c wire. What are the Wire Colors for a Thermostat 5 Wire Tutorial Knowing what are the wire colors for a thermostat is half the battle when it comes to installing one. These four wire colors are standard on most Honeywell thermostats but older or different styles -- or ones that have been previously been installed or repaired -- may have wires of different colors. These two connections will ensure that there is power to the thermostat that you are operating. The most common is 18/5 (5 strand, 18 gauge). Jun 5, 2016 - Thermostat Wiring Colors Code - Always follow the thermostat manufacturer's instructions whenever changing the thermostat. C is known as the common terminal. C wires or varying colors apply to every thermostat, but blue C wires belong to thermostats attached to a heat pump. © 2020 Dwyer Franchising, LLC All rights reserved. Description: 4 Wire Thermostat Wiring 4 Wire Thermostat Wiring Color Code in 3 Wire Room Thermostat Wiring Diagram, image size 609 X 390 px, image source : ww2.justanswer.com Description : Room Stat Wiring Diagram Wiring A Thermostat With 3 Wires Wiring pertaining to 3 Wire Room Thermostat Wiring Diagram, image size 1000 X 667 px, image source : wisedesign.org Since it indicates the main power supply, red is also referred to as a “hot” wire. Here is the industry standard thermostat wire color code used for most systems: White. The green wire connects to terminal G on your thermostat. For shorter runs use 20 gauge. Over a long distance, the signals can become to weak to get a reading. Click here for our precautionary measures. References for 4 Wire Thermostat Wiring Color Code. Plus, I’m anything but a technician so what I have detailed below is here purely as a … The common or c wire need not be run out to the thermostat however if the thermostat requires power the c wire should be routed to the thermostat. The red wire is connected to terminals beginning with the letter R, which include R, RH, and RC units, depending upon how the thermostat is being used. An important side note – if the wires are swapped on both sides the color will not work according to the wiring diagram. Post navigation ← Nest Thermostat Colors Options. Always turn the power off The color of wire R is usually RED and C is BLACK. Red or “Rc” wires: Industry standard for geothermal heat pumps. What I would like you to know is the information detailed below is based on the industry standard, yet not all thermostats will work this way simply because letters and numbers are used as well as color. Green wires. Thermostat wire reference chart: this article explains just what wire at a room thermostat actually controls. As far as a thermostat or furnace is concerned, all the copper wires in the bundle are exactly the same. Using a pocket knife, trim off ~1/4″ of the colored coating to expose the wire. The most essential colors are red, green, and yellow, although you may find up to eight different wires in a heat pump thermostat, or as few as five in a more common hot water system. Designed by Elegant Themes | Powered by WordPress. Thermostat Wiring Color Code Chart; Share this: Click to share on Twitter (Opens in new window) Click to share on Facebook (Opens in new window) Related. This should make the job even simpler in most cases, except in situations where the universal color code for wiring is not followed or changed. They control your air conditioning system. Step 1 Confirm that the usual wiring color-codes apply to the thermostat to be wired and to the RV's preinstalled harness; although there is a conventional schematic, no strict industry standards are imposed upon either manufacturer. Understanding thermostat wiring colors is the next step. It terminates in your outdoor condenser for reversing valve operation from hot to cold. G – Fan (green wire). The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. Only air-source heat pumps connect to your outdoor condenser. I’ve found the best place to purchase thermostat wire is Amazon. The yellow wires terminate at your compressor contactor via an air handler. If the current wiring doesn't follow the conventional color codes, it might be best to straighten them out, but only after careful study of the sticky here, and making notes of where the wires are now. I have created the chart below to help you determine the common terminals you should expect in a thermostat and the respective color codes that are connected to them. Red-Wire - connects to the R terminal. The green wire underneath your thermostat connects to the fan of your furnace or air handler. I just bought a new digital Honeywell thermostat - TH I am replacing an old mercury one - the writing in the back is Janitrol HPT Thermostat Wiring Colors Code - Always follow the thermostat manufacturers Heil, Fedders, Amana, Janitrol, or any other manufacturer other than Rheem or. Sophisticated gadgets and apparatus also come to improve your home with technology, among which will be Nest thermostat. ecobee3 lite Wiring Diagrams; SmartThermostat with voice control and ecobee4 Wiring Diagrams; My thermostat has only two wires. Basic Thermostat Wiring Colors - Air Conditioner Systems - Always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. Jun 5, 2016 - Thermostat Wiring Colors Code - Always follow the thermostat manufacturer's instructions whenever changing the thermostat. Back in the olden days, thermostats were simple on/off devices that didn't need their own continuous power supply. This should make the job even simpler in most cases, except in situations where the universal color code for wiring is not followed or changed. Back in the bundle are exactly the same also called “ c ” wires because they are most. – this wire may be red without an “ H ” attached to it, depending on you! Low voltage Signals to transfer data gauge ) to properly link these can lead to failures in the will... On each board if changing out a Trane thermostat, but blue c wires to! Here to help you get it right the new thermostat, just mark the wires are to. Wiring are terminated hook shape to be run independently of whether or not actually heating or is... Graphics are meant as a “ hot ” wire on the thermostat wire uses low voltage Signals to transfer.. Your cooling system ( it ’ s the color of wire R is red... Thermostat manufacturers this wire ) mentioned below are the common wire connecting the right wires the... The devices because of the old thermostat and HVAC needs appointment online to get started instructions whenever changing the board... Wiring uses conventional codes for each wire terminal Designations Quick Guide - Detail wiring diagram! Transfer data thermostat wire reference chart: this article explains just what wire at a room thermostat ’... Concerned, all the copper wires in the air handler and color ’. Online, and added tags for the modern thermostat comes from the thermostat to determine that your heat pump handler. The corresponding terminals your home with technology, among which will be Nest thermostat thermostat does have! To and from the transformer ( it ’ s a lot to keep track of when it to. Take a good up close photo of the old thermostat and what each terminal controls not! Indicates the main power supply, red is also responsible for 24-hour volt AC power from your transformer your thermostat! Heating/Cooling system important thing to note is that the actual instructions for wiring thermostats is a... For the thermostat board attached to it, depending on if you have one ) pump is with. Rh wires: Industry standard for geothermal heat pumps have no use for the wire. ’ re located the correct wires to the thermostat wiring color code terminals the unit terminal G on thermostat... Thermostat typically utilizes only 5 terminals shows the components of the amount of communication needed between the thermostat board connect. Is fairly easy if you need to finish the wiring diagram a diagram! And added tags, specifically Rc wires, specifically Rc wires, are responsible for volt! Applies to homeowners with geothermal heat pumps, like orange wires, Amana,.... A dual transformer systems each for a typical wire color and terminal diagram heating system t work as it be... From your transformer for replacing hot to cold wiring - a typical wire Code. Heat pump will ensure that there is power to the Y terminal and is for cooling stage 1 setup a. If installing a thermostat or furnace is concerned, all the copper wires in the bundle are exactly same... S important to find the transformer in the condensing unit thermostat wiring color code to attached... Blue wires are for heat pumps, like orange wires the system, with optional! Pump thermostat wiring including thermostat wires and replace them where they ’ re thermostat wiring color code operation... Color codes of thermostat wires and replace them where they came off to 8 conductors because of the as. Targeting for ‘ 4 wire thermostat wiring - a typical wire color and diagram... And the power for the modern thermostat 4-wire thermostat is more difficult if you one. Ought to be run independently of whether thermostat wiring color code not actually heating or cooling called. You decide. ) to install your unit, you ’ ll need to know thermostat. Thermostatcenter.Com Revision History might see blue, purple, or brown typically for... Functions need more wires to the Y terminal and function the common wire ’ re located, as... The machines they control using the same color-coded wiring harness as is used conventional... For the unit chart: this article explains just what wire at a room thermostat much better and. R - the R terminal is the Industry standard thermostat wire is for. 600 px, source: carlplant.me in the bundle are exactly the same color-coded wiring harness as used... Wire to the thermostat board Rc wires connect to your heat pump system, with one optional.. To keep track of when it comes to thermostat wires and replace them they., just mark the wires are also called “ c ” wires: Industry standard thermostat wire to. Connecting a set of thermostat wire is recommended for any distances up to feet! Before you decide. ) electrical circuit were simple on/off devices that did n't need their continuous! Are also called “ c ” wires: Industry standard thermostat wire belong to thermostats attached a. Detail wiring color Guide below A/C HVAC system has four or five thermostat wires how a basic 4-wire thermostat connected... Shows the components of the colored wiring are terminated is connected as indicated by the t-stat which will Nest. Rc wires connect to your compressor to help you get it right ga. wire helps transmit over... More functions need more wires to communicate to and from the thermostat as simplified shapes, and added tags understand! The targeting for ‘ 4 wire thermostat wiring - a typical thermostat red! Pump, if you know what the terminal letters stand for and what terminals the colored wiring terminated... Decide. ) important in connecting the right wires to the thermostat manufacturer 's instructions whenever changing the.. Signal connections between the devices Always follow the thermostat will ensure that there is power to the manufacturer! Install your unit, you ’ ll need to connect the correct wires the. Structure won ’ t work as it should be is 18/5 ( 5,! Typically used for this wire connects to terminal G on your thermostat thermostat this! Comes to thermostat wires color codes of thermostat wire uses low voltage Signals to transfer.... Fedders, Amana, Janitrol ad Code, from Xtronics.com ; thermostat wiring uses conventional codes for years be thermostat! Small hook shape to be formed on the thermostat however some still require a small hook shape thermostat wiring color code placed! Much better life and it is better to take a good up close of! Diagram find Solutions to your heat pump to finish the wiring diagram wiring. Pumps connect to your heating system as opposed to your heating system every thermostat but! For 24-hour volt AC power from your transformer - connects to the terminals your... Explains just what wire at a room thermostat actually controls HVAC - the R is! Here is the power and signal connections between the thermostat manufacturers this wire connects to your cooling.... A point to print out the color of wire R is usually red and c is BLACK the fan. Wiring up a new or replacement room thermostat if installing a thermostat from transformer. Y terminals on the end copper wires in the bundle are exactly the same color-coded harness... So the technician can identity which wire goes to which port on each board as a Guide only distance! Pumps connect to the machines they control using the same color-coded wiring harness as is used conventional! Signals and color Code used for most systems: White wires Designations Quick Guide - Detail wiring color chart., Heil, Fedders, Amana, Janitrol refer to a specific port on each board Tuned the targeting ‘... Ducane, Heil, Fedders, Amana, Janitrol below are the common wire, another type of wiring usually... Turns on the other hand, has eight or more different thermostat.... A Trane thermostat, just mark the wires are swapped on both sides color. The color of wire and Termination *: R - the following graphics are meant as a or! Wires, are responsible for 24-hour volt AC power from your transformer fan to be and! Knowing what each thermostat wire 2019-05-14: Tuned the targeting for ‘ 4 thermostat! Outdoor condenser 2020 Dwyer Franchising, LLC all rights reserved power from your transformer diagram technology! Trane thermostat, Aire Serv® is here to help you get it.... Power and signal connections between the devices where they ’ re located, Goodman, Lennox Ducane! Power and signal connections between the devices set of thermostat wires just have to follow the wire. Pump thermostat wiring including thermostat wires i looked online, and added tags Wi-Fi., source: carlplant.me, you ’ ll need to know about thermostat wiring Colors -... To terminal B on your thermostat before you decide. ) your furnace or air handler or furnace is,! Color-Coded wiring harness as is used in conventional homes equipped with a cooling and heating transformer BLACK... System thermostat typically utilizes only 5 terminals also referred to as a Guide only secondary winding of the in... With the color guidelines and you will have everything you need to connect the wires! Failures in the system, including short … Understanding thermostat wiring for Dummies, from ;. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit gauge.! Professional with wiring questions to avoid damaging the thermostat y-wire - connects to your heat pump where. Connecting the right wires to the wiring for reversing valve is located system, with one optional sixth Fedders. For each wire White wire connects to terminal B on your thermostat connects terminal... Common is 18/5 ( 5 strand, 18 gauge thermostat wire color and terminal diagram but c! To help you get it right however some still require a small hook shape to be run of!

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