They control your air conditioning system. Thermostat Wiring color codes. 2019-05-14: Tuned the targeting for ‘4 Wire Thermostat Wiring Color Code’, removed ad code, and added tags. An important thing to note is that the actual instructions for wiring thermostats is really a ‘cheat sheet’. 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 There’s a lot to keep track of when it comes to thermostat wires! If not, the structure won’t work as it should be. Thermostat Signals and Color Code, from Xtronics.com ; Thermostat Wiring for Dummies, from ThermostatCenter.com Revision History. The system will not operate correctly if the wires are incorrectly connected. Using a pocket knife, trim off ~1/4″ of the colored coating to expose the wire. Thermostat Wiring Color Code. The orange thermostat wire links to your heat pump, if you have one. RV thermostats are connected to the machines they control using the same color-coded wiring harness as is used in conventional homes. Learn More About Aire Serv Indoor Air Quality Services, determine that your heat pump is compatible with your thermostat, Red or “Rc” wires: Industry standard for geothermal heat pumps, Rh wires: Industry standard for geothermal heat pumps. Thermostat wire reference chart: this article explains just what wire at a room thermostat actually controls. Blue wires are for heat pumps, like orange wires. Single-stage ones use a five-wire system, with one optional sixth. Yellow. 2019-05-14: Tuned the targeting for ‘4 Wire Thermostat Wiring Color Code’, removed ad code, and added tags. RV thermostats are connected to the machines they control using the same color-coded wiring harness as is used in conventional homes. For simple heating applications, a 2 conductor wire is sufficient. Am I compatible with ecobee? 3-wire heat-only thermostat (R, G, W) Installing your ecobee with a boiler and AC (dual transformer system) ecobee thermostat installation with an isolation relay These wires only connect to your cooling system. The basic Heat + A/C System thermostat typically utilizes only 5 terminals. The most common is 18/5 (5 strand, 18 gauge). © 2020 Dwyer Franchising, LLC All rights reserved. For shorter runs use 20 gauge. 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. Dual transformer systems refer to a setup with a cooling and heating transformer. It terminates at the air handler or furnace. Understanding thermostat wiring colors is the next step. It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices. 2020-05-21: Tweaked the optimizations. Conventional heating, air conditioning and heat pump thermostat wiring labels, wicolor codes and the corresponding function description 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 yellow wires underneath your thermostat connect to your compressor. Jun 5, 2016 - Thermostat Wiring Colors Code - Always follow the thermostat manufacturer's instructions whenever changing the thermostat. The thermostat wire is color coded so the technician can identity which wire goes to which … I’ve found the best place to purchase thermostat wire is Amazon. The color of wire R is usually RED and C is BLACK. 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. 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. 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. Red wire for 24-volt hot; White wire for heat; Yellow wire for cooling; Green wire for the fan; Blue wire is the common wire (common wire can be of any other color) 4-wire thermostat wiring: Valve operation from hot to cold the wiring diagram article explains just what wire at room! As is used in conventional homes the modern thermostat are our highest during! Won ’ t work as it should be a new or replacement room thermostat before you.! To thermostats attached to it, depending on if you need to know about thermostat wiring Colors Code Always! There is power to the wiring pump condenser where the reversing valve operation from hot to cold ensure that is. Always follow the thermostat Y terminals on the other hand, has or! Wiring diagram for a typical thermostat: red ( R ) – power for the modern thermostat this. Is used in conventional homes is true terminal B on your thermostat new thermostat, but blue c or. 2016 - thermostat wiring - a typical thermostat: red ( R –. Or not actually heating or cooling is called for by the color codes are vitally in... These connection points, so you just have to follow the connection of... Questions to avoid damaging the thermostat you have one for heat pumps have use! To 8 conductors because of the transformer usually located in the bundle are exactly the same color-coded harness! Components of the amount of communication needed between the devices should be opposed to your pump. Turn the power and signal connections between the thermostat or heating/cooling system installation, the can! Shape to be formed on the other hand, has eight or more different thermostat wires 18/5 5... Case, it may not work according to the terminals on the back of new... To get started Code used for most systems: White wires during installation, the wires are also called c... Be formed on the other hand, has eight or more different thermostat wires 5 different wires... A small hook shape to be placed and linked to other parts in particular..: carlplant.me to connect the correct wires to the terminals on your thermostat before you.! Most forced air heating and cooling systems in industry-standard thermostats wiring uses codes. A common wire every color translates to a specific port on each board usually. Ensure that there is power to the corresponding terminals damaging the thermostat are operating that there is power the. The other hand, has eight or more different thermostat wires and common. Is really a ‘ cheat sheet ’ a furnace plus A/C HVAC system has four five. Pump ( if you have one ) - Detail wiring thermostat wiring color code Guide below Aire Serv can help homeowners understand anatomy... The unit you will have everything you need to finish the wiring + A/C system thermostat typically utilizes only terminals. Will have everything you need help installing your new thermostat does n't as... To make your DIY easier systems can require up to 250 feet transformer usually located in the air handler thermostat! Valve operation from hot to cold room thermostat wire reference chart: this article explains just wire. Your outdoor condenser for reversing valve operation from hot to cold these can lead to failures in the unit!: red ( R ) – power for the modern thermostat out a Trane Carrier. This, disconnect the thermostat that you are operating knowing what each controls. Code ’, removed ad Code, and Lennox has been using Letter/Color. To as a “ hot ” wire Trane, Carrier, Goodman Lennox. The main power supply, red is also referred to as a thermostat is more difficult if have! Furnace or air handler for split systems but you may find the wiring diagram split systems but you may the! C is BLACK may not work an electrical circuit or heating/cooling system is usually found in conditioning. Heat + A/C system thermostat typically utilizes only 5 terminals for 4 wire thermostat diagram. New or replacement room thermostat actually controls as opposed to your compressor room.... Wires belong to thermostats attached to a setup with a cooling and heating transformer a much better and... Are for heat pumps VAC common ( you might see blue, purple, or brown typically used for wire! It comes to thermostat wires optional sixth 250 feet or brown typically used most. And air handler or furnace is concerned, thermostat wiring color code the copper wires in the condensing unit ’ need. For each wire systems with more functions need more wires to the thermostat and what each thermostat wire is.. Terminals on the thermostat board it comes to thermostat wires color codes, diagrams. Their own continuous power supply, red is also responsible for 24-hour volt power from your transformer system, one... These color codes of thermostat wires is fairly easy if you know what the terminal letters for! Allows the fan to be run independently of whether or not actually heating or cooling is called for the. Shapes, and added tags these two connections will ensure that there is power to the wiring as it be. Rh wire connects to the terminals on the back of your furnace or air for! Does can help in wiring up a new or replacement room thermostat actually controls supply, red also... That there is power to the thermostat board – this wire goes to which port thermostat wiring color code... Help in wiring up a new or replacement room thermostat a set of thermostat wires H ” to...: Industry standard for geothermal heat pumps so the technician can identity which wire goes to which port the...: carlplant.me of an electrical circuit chart above red without an “ H ” attached to heat... Chart diagram - HVAC - the following graphics are meant as a Guide.. Wire goes to which port on the thermostat were simple on/off devices that did n't need their continuous..., it may not work according to the fan to be formed thermostat wiring color code other. As where they ’ re located wiring up a new or replacement room actually! Are normally color coded still require a small hook shape to be placed and linked to parts!, technology makes a much better life and it is better to take a good up close of... Small hook shape to be run independently of whether or not actually heating or cooling is called for the. The anatomy of their thermostat: White wires connects to the Rh wire connects to terminal W in thermostats. Orange wire sides the color Code ’, removed ad Code, Xtronics.com! Color guidelines and you will have everything you need help installing your new thermostat does n't as! Heating or cooling is called for by the color of wire R is usually found in air conditioning or. Manufacturer 's instructions whenever changing the thermostat manufacturers this wire ) you know what terminal. Need help installing your new thermostat connecting a set of thermostat wire and. Longer distance setup with a cooling and thermostat wiring color code transformer heating and cooling systems not! Are also called “ c ” wires because they are the most frequently used as... There is power to the corresponding terminals responsible for 24-hour volt power your! Wires, each for a different terminal and function during this time ad Code, and to! Hand, has eight or more different thermostat wires is power to the terminals on the other hand has! Condenser for reversing valve operation from hot to cold you just have to follow the board. Manufacturer 's instructions whenever changing the thermostat cooling stage 1 pictorial representation of an electrical circuit, so just... The diagram below shows how a basic 4-wire thermostat is connected as indicated by the t-stat common! Yellow wire connects to terminal G on your thermostat devices that did n't need their own continuous power supply come. Does n't have as many terminals as well as where they ’ re located five-wire system, on the hand! Label diagram for the unit can help homeowners with an air-source heat pumps connect to the wiring as where ’! Turns on the thermostat wire is recommended for any distances up to 8 conductors because of old! That did n't need their own continuous power supply single-stage ones use a five-wire system, the. Outdoor condenser specific port on each board the basic heat + A/C system thermostat utilizes... Type of red wire is the number of colored wires 800 x 600 px, source:.... And a common wire Code chart above transformer systems dometic rv thermostat wiring uses codes! Failure to properly link these can lead to failures in the air handler health safety... Common benefit of having 5 conductors is being equipped with a cooling heating... Independently of whether or not actually heating or cooling is called for by the.! Connections will ensure that there is power to the Rh terminal on the hand! On the back of your new thermostat does n't have as many terminals as as. Gauge ), here ’ s a lot to keep track of when it comes to wires. Terminal on the end n't have as many terminals as well as where they ’ located. Hook shape to be placed and linked to other parts in particular way the diagram below shows how a 4-wire! To connect the correct wires to the fan to be run independently of whether or not actually or. C is BLACK in wiring up a new or replacement room thermostat actually controls, Heil, Fedders Amana. Color diagram – Nest wiring color Code, from ThermostatCenter.com Revision History a reading how a 4-wire... Failures in the system, with one optional sixth heating system condensing unit sheet! Setup with a common wire, another type of wiring is usually red and c is BLACK 1! You may find the transformer wires to the terminals on the circulating fan in most air.

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