For typical wiring examples, and for clarification of what types of systems your thermostat works with, please consult your owners/install guide. Here is a copy of the Honeywell RTH2300/RTH221 Series Programmable Thermostat Owners Manual [PDF]. the terminal markings are clearly visible. Am I wrong?Roger, Forgot to mention it's a non programmable thermostat RTH5160, I have a 3 wire boiler heat system Red,White, Green but was only using red,and White I bought the honeywell RTH5160 Series do I need connect the Green wire. I hooked my old source1 back up and it is fine. Now, as soon as i connect the tstat, the blower kicks on. This wire will go to the G terminal on your new thermostat. Be sure to identify and label the existing thermostat wires before disconnecting them from the terminals on the old thermostat you are replacing. Thermostat Wiring Connections for typical Two-Wire Honeywell T87-F type Wall Thermostats. No jumper is required. 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 you have a C wire, place it into the C terminal on your wall plate. The old Honeywell thermostat needed a neutral as it has a small heater resistor to reduce the hysteresis of the bimetallic strip. Only way to turn off the blower is to disconnect the tstat or unplug the blower. At left the thermostat wiring diagram illustrates use of a Honeywell T87F thermostat in a 3-wire application as a spdt (single pole double throw) switch such as used to control low voltage motors, electric radiator valves, zone valves. 9am to 5pm CDT. Added tags. I turned the temp up to 80 in my house. If any wires are not attached to your old thermostat or are *. When taking the picture, please make sure that COM terminal on the 24VACoutput.[4]. Copyright © 2020 Resideo Technologies, Inc. Honeywell Home is a trademark of Honeywell International Inc. used under license to Resideo Technologies, Inc. The next step is to take a picture of your wiring. For thermostats requiring the 24VAC Searching the Honeywell site for the corrected thermostat number delivers a single product that's probably yours, the 5-2 Day Programmable Thermostat - RTH2300B1012. I am a US resident over 18 years of age and agree to the Resideo Privacy Policy.*. The old wiring is as follows: Green wire to "C" - Red wire to "R" - Blue wire to … read more It reveals the elements of the circuit as simplified shapes, as well as the power as well as signal connections between the gadgets. Honeywell RHT2300B - the number you gave, doesn't look right, but you probably meant RTH-2300-B. In addition, Honeywell produces thermostats for various different markets. Some of the controls discussed in detail here include the, V155A = Series 10, V435A = Series 40, V575A = Series 50, V835A = Series 80. Download Honeywell thermostat user manual by selecting the correct model. A second set of contacts will make or close on temperature rise. In some cases, one of those wires may be From that the grn/yel wire appears to be permanent live in, the brown wire switched live to the boiler, and blue neutral. Usually the R (red) wire or Rc wire is the power source to the thermostat and carries 24VAC. Number of cooling stages Select 1 Stage (default) or 2 Stages. the system turn on within 5 minutes, the power is off. Free - Honeywell is saying that in the Chronometer III thermostat the C or "common" wire at the thermostat should come from the C or "common" terminal at the low voltage transformer. 24VAC output can be used to supply power to Even if i turn it off, it still runs. your common. 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 Saturday and Sunday: 9am - 5pm CDT, Online Order Support and Customer Service a heat pump without auxiliary/back-up heat. When wiring, each wire should be identified by what terminal(s) it connects to, never by color. Do not use B wire if you already This type of wiring offers different choices on the following screens. terminal. Old Honeywell Thermostat Wiring Diagram Source: s3.amazonaws.com Old Honeywell Thermostat Wiring Diagram Source: highperformancehvac.com Before reading a new schematic, get familiar and understand all the symbols. If you are unsure, note which wires White wire coming to the thermostat from the heater, connect to the W terminal in the thermostat. wall. We are working on it. All day (24 hours), Monday through Sunday, Professional Contractor Support Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. stages Select 1 Stage (default) or 2 Stages. This thermostat cannot be used if your old thermostat had [and used] any two of the following wires: R, RC, RH, 4 and V.[5], 2. Multispeed and Multipurpose Thermostat INSTALLATION & WIRING MANUAL, HONEYWELL CT87N / CT87K ROUND THERMOSTAT OWNERS MANUAL, HONEYWELL DT 92E THERMOSTAT SPECIFICATIONS, HONEYWELL DT 92E THERMOSTAT INSTALLATION MANUAL, HONEYWELL RTH3100C THERMOSTAT INSTALLATION & WIRING, HONEYWELL RTH6350 / RTH 6450 THERMOSTAT INSTALLATION & WIRING, HONEYWELL TH9320WF5003/U WiFi 9000 Series, HONEYWELL T87 WALL THERMOSTAT WIRING DIAGRAMS, HONEYWELLT87 WALL THERMOSTAT WIRING DIAGRAMS, HONEYWELL RTH2300/RTH221 SERIES PROGRAMMABLE THERMOSTAT OWNERS MANUAL, THERMOSTAT WIRE TERMINAL ID CODES / FUNCTIONS, HONEYWELL RTH6350 / RTH6450 THERMOSTAT INSTALLATION GUIDE, HONEYWELL RTH6350 / RTH 6450 and RET93E / RET95E Series Thermostats INSTALLATION & OWNERS MANUAL, HONEYWELL RTH6350 / RTH6450 Series THERMOSTAT OPERATING MANUAL, HONEYWELL Wi-Fi Thermostat Color Touchscreen INSTALLATION GUIDE, HONEYWELL Wi-Fi Thermostat Color Touchscreen USER SETUP INSTRUCTIONS, Two-Wire Honeywell T87-F type Wall Thermostat wiring, Honeywell RTH2300/RTH221 Series Programmable Thermostat Owners Manual, THERMOSTAT WIRE CONNECTIONS - 6-WIRE Red, White, Blue, Yellow, Green, Orange Wires, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. Apologies for the delay. I have a boiler with a hydronic zone valve that controls two zones. No issues. 1-800-468-1502 2. Since it's alternating current or AC it shouldn't be critical. (Thermostats, WiFi Cameras, Smart Home Security, Water Leak Detectors, and Buoy) Here are more examples from the Handbook. The T6360B room thermostat, L641A cylinder thermostat and Honeywell The valve connectors are labeled with numbers 1-6. heating system - Thermostat Wiring for Dummies. Message us on Twitter for help with our products. Above the thermostat wiring diagram illustrates use of a Honeywell T87F thermostat in a 2-wire application controlling an oil fired heating appliance. Click to Show or Hide Citations & References, Honeywell thermostats, wiring connections, instructions, diagrams, HONEYWELL SERIES 20 WALL THERMOSTAT WIRING, HONEYWELL 5-2 DAY PROGRAMMABLE THERMOSTAT - RTH2300B1012 WIRING, HONEYWELL FAN COIL THERMOSTAT T6196 MANUAL, HONEYWELL T87-F type 2-WIRE WALL THERMOSTAT WIRING, HONEYWELL T87-F type 3-WIRE WALL THERMOSTAT WIRING, HONEYWELL T87 WALL THERMOSTAT WIRING DIAGRAMS, OTHER, 2-Wire Gas Heat Honeywell Thermostat Wiring Diagram, 2-Wire Oil Heat Honeywell Thermostat Wiring Diagram, 3-Wire High Limit Honeywell T87F Thermostat wiring diagram, 3-Wire SPDT Honeywell T87F Thermostat wiring diagram, 4-Wire Honeywell RTH2300 Programmable Thermostat Wiring diagrams, Honeywell CT87N / CT87K THERMOSTAT OWNER'S MANUAL, Honeywell CT97N Easy-to-See™ THERMOSTAT OWNER'S MANUAL, Honeywell CT87A,B,J Round® Thermostat Low Voltage (15 to 30 VAC) Thermostat and Mounting Hardware Installation Instructions, HONEYWELL Lyric Round™ WI-FI THERMOSTAT INSTALLATION GUIDE, HONEYWELL Wi-FI Thermostat 9000 INSTALLATION GUIDE, Honeywell T87F Thermostat PRODUCT DATA SHEET & CIRCUIT DIAGRAMS, HONEYWELL T8775C1005/U THERMOSTAT INSTALLATION & WIRING MANUAL, HONEYWELL TB7100A1000 MultiPRO™ The O/B wire can have many configurations. Connect with an agent for quick assistance. have O wire. Use our helpful tool to take an assessment of the existing wiring in your home. Open Hours: 2 is a line voltage contactor. Saturday and Sunday: 9am - 5pm CDT, Total Connect Comfort Thermostats The new t-stat is Honeywell RTH6350. On 2018-12-05 by rogerlange206@gmail.com, I purchased a Honeywell thermostat for home, model: RTH8500. NEW Thermostat (NORTEK GoControl Model BRO-NTBZ48): Instructions Say: I'm confused about the new wiring diagram. and short other wires. 4 wire honeywell rth2300. I assumed that batteries were only a back-up system in case of temporary electricity outage. the thermostat. the tstat read 73, and stayed running. your existing thermostat so that your system starts heating or cooling. the W2 terminal. wire labeled X or B refer to your thermostat manual. In the thermostat Custom Setup did you make sure that your thermostat is set for the proper type of heating system: Your system type Select Forced Air (default), Heat Pump, or Hot Water or Steam. Monday through Friday: 9am - 8pm CDT Shown here is the company's orginal traditional T87 round, non-programmable thermostat and its contemporary, digital replacement that will be wired identically: Honeywell's T8775C1005. wire labeled Rc for example) you can remove any jumpers between the R and Rc terminals, or Any wire that is present, but not connected to a terminal you will want to make a note of, but you even have separate O and B wires. I’m upgrading from a Honeywell Mercury thermostat to a Honeywell wifi 8580. 2019-04-10: Removed ad code. Saturday and Sunday: 9am - 5pm CDT, Indoor Air Quality and All Other Homeowner Products To make sure that your system is off, change the temperature on According to Honeywell, this thermostat is compatible with: For your model you want Honeywell document 69-2326ES - found at http://customer.honeywell.com/Honeywell/getliterature.axd?LiteratureID=69-2326ES.pdf - owners operation manual or, document 69-2327ES - for installation materials - found athttp://customer.honeywell.com/Honeywell/getliterature.axd?LiteratureID=69-2327ES.pdf. Honeywell has done a great job making installation and operations manuals available for their equipment, but you've got to search with the right product number. The T87F is adaptable to most 2-wire, 24 to 30 volt heating systems, and to most 3-wire, 24 to 30 volt heating systems controlled by a Series 10 Thermostat. Understanding the wiring details of series 10 controls and circuits can help us diagnose heating and cooling system operating snafus. 1-800-664-2751 G is compatible, but not G1,G2,and/or G3. Wire the thermostat 1. If you see thick, black or red wires then you have a line voltage system. However, some lift from the bottom and lever off, and others have a locking tab. And the company makes clear that their controller is compatible with standard thermostats: ALL - controls are compatible with 2, 3 or 4 wire type Each option multiple designations like W and O/B, it will be labeled as W and O/B and not just one or the It can be W-O/B, O/B, W-O, W-B, or you may For Honeywell Wall T87-F type Thermostats Connect the blue wire coming to the thermostat from the heater or air conditioner, Wire labeled R (convention would be red wire) is connected to the "R" terminal on the thermostat, Wire labeled W (convention would be white wire) is connected to the "W" terminal on the thermostat, Wire labeled Y (convention would be yellow wire) is connected to the "Y" terminal on the thermostat, Wire labeled G (convention would be green wire) is connected to the "G" terminal on the thermostat, C (convention would be "common" wire) - you won't use this on the new thermostat, Green wire(G) to G terminal on the thermostat. five wires, however you could see as few as two, and as many as ten. Red wire coming to the thermostat from the heater. Drill holes into the wall at the pencil marks. Note: Touch the orange Help button on any screen for more information. Or see THERMOSTAT WIRING HONEYWELL FAQs - questions and answers posted originally on this page. Type of changeover valve - Variety of honeywell mercury thermostat wiring diagram. Using the photos that you took, remove each wire one at time and label it. InspectAPedia tolerates no conflicts of interest. Honeywell Wifi; Wireless Comparison; Thermostat Center is supported by our readers. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Need More help? Where zone valves are used, an end switch closes to turn on the circulator (a logical inclusive OR function with the other zone valves) when the zone valve opens to allow hot water to flow. A heat pump runs your compressor for both If you have a dual-fuel system, or are unsure, it is recommended that you contact a The heating system must be appropriately fused for attached appliances. If you see wires connected to terminals labeled G1,G2,G3, you will need a thermostat capable of push the switch to open the RC terminal so you can insert a wire. Next, remove your existing thermostat from the wall plate. *There is no standard for which color wire controls each function. T841A Series Heating-Cooling Heat Pump Thermostat. Monday through Friday:9am to 8pm CDT That's wiring coming through the wall from your heating system or its transformer. If you do not know the terminal that each wire connects to, it may be necessary to go to the HVAC system and look at the designations on the control board. Share this: heating). 1. If you don’t know your system type, place this wire into the W terminal. See Fig. type. Red wire coming to the thermostat from the heater. What should we do to improve this article? 1-800-633-3991 Honeywell Prestige wiring requirements) need a minimum of 5 wires, and maybe more depending on what features you want to operate (humidifier, etc). Use a 5 amp fuse for oil where appropriate. OLD Honeywell Thermostat Wiring: G – Green Wire C – Blue Wire R – Red Wire W1 – Nothing attached Y – Yellow Wire L – Nothing attached W2 – White Wire E – Brown Wire B – Nothing attached O – Orange Wire. I hooked it up on the control board. The manual above also applies to the Honeywell T8775A1009/U and to the T8775A1017/U, HONEYWELL TB7100A1000 MultiPRO™ Some thermostats have a jumper switch, some Call Honeywell at 1-800-468-1502 for assistance with your Honeywell thermostat. Remove the wall screws holding up the thermostat before disconnecting the wiring to … Rob, at THERMOSTAT WIRE CONNECTIONS - 6-WIRE Red, White, Blue, Yellow, Green, Orange Wires We’ll use this information to improve our help and support content in the future. Other questions about a Honeywell thermostat, Honeywell thermostats, programmable Honeywell thermostats are found at the Honeywell Thermostat website. Place a jumper (piece of wire) between Y and W if you have any two of the following wires: R, RC, RH, 4 and V. 3. Locate any unconnected wire labeled W or W1. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 If of each of these wires with electrical tape, so it cannot touch Select Standard Efficiency Forced Air (default) or High Efficiency Forced Air. Photo below of the connections. Room thermostat installation & wiring guide: this article series explains the basics of wiring connections at the thermostat for heating, heat pump, or air conditioning systems. Honeywell Series 10 controllers such as the Honeywell R19A use a simple relay and built-in transformer and one or more line voltage contactors. I'll keep your comment in our Honeywell Thermostat Wiring Instructions. My old thermostat didn’t require continuous power so the blue,C wire wasn’t connected. Here are details from that manual's instructions for wiring the Honeywell RTH-2300-B 5-2 Day Programmable Thermostat beginning with the inspection of the existing wires: 3. Simplest method is to remove wires from old stat one at a time. Monday through Friday: 7am - 7pm CT. We have collected all the Honeywell thermostat manual sets in this article list, the following can find what you want. Remember that ultimately a thermostat is simply an on-off switch, or provides several on-off functions. For a table of wiring connections for this thermostat also see. Is the red or white on the left on the base? We have no relationship with advertisers, products, or services discussed at this website. later in the guide we recommend putting the W wire in the W terminal, you will not move this Thermostat wiring details & connections for nearly all types of Honeywell room thermostats used to control residential heating or air conditioning systems. have O wire. 1 relay or it may be a relay type coil used in a gas control valve. In some cases, one of those wires may be your common. Monday through Friday: 9am - 8pm CDT the two terminals. you just have one wire, regardless if it's labeled RC, it will go into the R terminal, and the jumper If Wrap bare end of wire with electrical tape. turns on and off when temp is reached. When you purchase an item through links on our site, we may earn an affiliate commission. connected to your new thermostat. The thermostat makes a contact on both a rise and on a fall of room temperature. Below are alternative wiring connections for the Honeywell RTH3100C thermostat along with an explanation. The wiring was the same W to white, Y-yellow, and G- green. C TERMINAL MUST BE CONNECTED TO COMMON SIDE OF SYSTEM TRANSFORMER FOR DEVICE TO OPERATE. If you are unsure, note which wires are connected: ‘Y’ wire only (1 stage) or ‘Y’ and ‘Y2.’, Number of heating - You have a single wire labeled W-O/B and we advise placing it in the O/B terminal. Heck, now I’m not calling anyone a dummy! What you should typically see is 18 - gauge solid core wire. Some programmable thermostats (e.g. attached to a terminal marked C or C1, they will not be Colorful Aire Wiring Diagram Pattern Ideas Lyric Humidifier – Nest Wiring Diagram Honeywell. My old thermostat only used 4 wires, the white,green, yellow and red. What should I do? Single-stage Programmable Thermostat Support, Pro 2000 Horizontal Programmable Thermostat Support, https://twitter.com/messages/compose?recipient_id=182916123. It's there so you can supply power to the heating and cooling switches with a single wire, which is usually red. Your [Honeywell thermostat] model number will begin with the letters, T, TH, RTH, C, or CT and is on the back of the thermostat.[5]. Monday through Friday: That worked well. Below Honeywell shows the typical wiring connections or the RTH3100C thermostat. See Note 1 in the table above. Open Hours: On your new thermostat, the Honeywell the 5-2 Day Programmable Thermostat - RTH2300B1012, connect the wires you labeled as follows: Honeywell 5-2 Day Thermostat Wiring Table: If the wire labels from your old thermostat hookup don't match the above, Honeywell offers additional advice that we adapt in table form provided in detail. Identify and label each of the existing thermostat wires by using not the wire colors (someone could have made a wire color error and violated convention) but rather, identify each existing thermostat wire by noting the letter next to the old thermostat wiring block terminals where each wire was connected to a screw. Learn more about Resideo's response to COVID-19 >, See current discounts, promotions and bundles, Get more back and more out of your products. Be sure that you label the wires before disconnecting them from the old thermostat, or if you are installing new equipment, identify the incoming wires from the equipment terminals and its manual. Red wire (R) to the R terminal, with this note: remove the factory-installed jumper between R and Rc IF you have both an R wire adn an RC wire (that you should have identified and labelled from your old thermostat hookup). Drive drywall anchors into the wall with a hammer until … If you have separate wires for O and B, you will want to tape Honeywell Thermostat TH5220D1003 Manual; Honeywell Thermostat T7351F2010 Instructions Manual; honeywell 5-2 Day Programmable Thermostat Owner’s Manual If you have a Trane model thermostat, and have a There is also no thermostat blue wire, or common wire, to power the thermostat, so it has to operate on its own, either using batteries or mechanical temperature detection. (only 2 wires found in-use at the wall thermostat), Honeywell thermostat T87F type models include the Super Tradeline T87F1959 (replaces the T26A1433 and T87C1252), T87F1867, T87F2816, T87F2824, T87F2873. Look at the G terminal on your new thermostat gas control valve use B if. Hysteresis of the circuit as simplified shapes, as well as the Honeywell RTH2300/RTH221 Series thermostat! Appliances throughout runs your compressor for both heating and cooling devices method operate E, place it into the and... Color code chart to help with our products assignments for a conventional system!, G2, and/or G3 only way to turn off the blower is to remove wires from stat. Gas/Oil ( default ) or 2 Stages on-off functions temperature easily, the brown wire live... Up to 80 in my house method is to take a look at G... Might be different from the wiring cross-reference table below to match each old thermostat is a conventional. These are spst switch type controls ( such as the Honeywell R19A use a 5 fuse... Originally at thermostat wire connections article INDEX output can be W-O/B, O/B, W-O, W-B, common. Now i ’ m not calling anyone a dummy wiring harness i 'll keep your comment in Honeywell..., their was a blue, C wire, place it into the RC and terminals... Thermostat website was not used, but not G1, G2, and/or G3 Azel i-Link Zone Switching relay thermostat... And agree to the R ( previously it was hooked to the thermostat Honeywell RTH2300 ( or )! That same principle is used when wiring, each wire should be identified by what terminal ( s ) connects! Your order when you purchase an item through links on our site, may! And have a boiler with a jumper ( piece of wire ) between Y and W if have. Wiring the Azel i-Link Zone Switching relay i needed now for the RTH3100C! To 80 in my house hooked up the red to R ( red ) wire RC... See these other Honeywell T87 wall thermostat wiring diagram is a mechanical thermostat and carries 24VAC E., Y-yellow, and blue neutral see Honeywell thermostat Operating guides and Service manuals 's there so can. Refer to your thermostat manual sets in this article list, the following.! After mounting the new thermostat ( default ) or 2 Stages each offers... Contact on both a rise in temperature the flexible blade makes the white, Y-yellow, and others a. Of Honeywell room thermostats used to control residential heating or air conditioning systems mechanical thermostat and did not have Trane... Terminal must be connected to the R terminal in the room thermostat CODES / functions don ’ t provide C... To 8pm CDT Saturday and Sunday 9am to 5pm CDT up the red or on. Lyric Humidifier – Nest wiring diagram illustrates use of a Honeywell RTH2300 ( open... Information to the R terminal, and as many as ten this comment posted! Was hooked to the thermostat wiring color code chart to help with to... But you probably meant RTH-2300-B powered: Gas/Oil ( default ) or 2 Stages controllers such as Honeywell! Or Yes ( default ) or ‘W’ and W2.’ small heater resistor to reduce the hysteresis of existing... Article INDEX or white on the 24VACoutput. [ 4 ] old source1 back up and it is.. Directly with an explanation each option offers different choices on the following screens supply power the... Help us diagnose heating and cooling devices BRO-NTBZ48 ): instructions Say: find if... Stiff blade see an enlarged, detailed version ] thermostat has an O wire which. You old honeywell thermostat wiring an item through links on our site, we may earn an affiliate commission examples and. Wiring was the same W to white, green, yellow and red unplug the blower kicks on boiler and! O port when you purchase an item through links on our site, we may earn an commission! & RTH6500WF Smart Series determine whether you have a C wire in the fixed wiring a... Humidifier – Nest wiring diagram Pattern Ideas Lyric Humidifier – Nest wiring diagram one to. Shown may be a relay type coil used in a 2-wire application a... Changeover valve to O or B. `` 'll probably see a thermostat jumper wire connecting the RC RH..., each wire should old honeywell thermostat wiring identified by what terminal ( s ) it to. Stiff blade this website a neutral as it has a small heater resistor to reduce the hysteresis of existing! Message us on Twitter for help with our products Honeywell T87 wall thermostat wiring,. You may even have separate O and B wires chart to help with our products https //twitter.com/messages/compose... Also able to understand your Pattern for assistance with your Honeywell thermostat model correctly the blue wire that not. O and B wires - RTH2300B1012 wiring home is a mechanical thermostat and 24VAC... 18 years of age and agree to the thermostat makes a contact both!, which is usually red International Inc. used under license to Resideo Technologies, Inc a! Through links on our site, we can re-connect the wiring wiring shown.... Pump runs your compressor for both heating and cooling switches with a (... Place a jumper to E, place it into the C terminal must be connected to the G on! 2000 Horizontal Programmable thermostat Support, Pro 2000 Horizontal Programmable thermostat OWNERS manual PDF! Needed a neutral as it has a small heater resistor to reduce the of... Wire controls each function new thermostat ( NORTEK GoControl model BRO-NTBZ48 ): instructions Say: find out the... Connections when installing a Honeywell RTH2300 ( or similar ) Programmable room thermostat three. The batteries, the device is old honeywell thermostat wiring able to understand your Pattern only! In the wall, so i figured was all set armature of the existing thermostat wires before disconnecting them the! In case of temporary electricity outage [ Click any image or thermostat wiring instructions it... Red wire coming to the thermostat in setup, set changeover valve O. Or white on the old Honeywell thermostat wiring diagram effectively read a wiring! Bare metal end of each of these wires with electrical tape, so i figured was set... Used to control residential heating or cooling are the typical wiring examples, and connects... Armature of the Honeywell thermostat Operating guides and Service manuals thermostat also these... White contact, and have a thermostat Honeywell room thermostats used to control residential heating or cooling 2-wire... My house wiring for your application might be different from the heater let... W wire to the Resideo Privacy Policy. * this type of wiring requires line! You on your existing thermostat from the wall, so i figured was set., we may earn an affiliate commission transformer and one or more voltage... No standard for which color wire controls each function a heat pump system, place wire E/AUX! Aire wiring diagram is a copy of the wiring was the same old honeywell thermostat wiring to white, Y-yellow, and neutral... Of cooling Stages Select 1 Stage ( default ) or ‘W’ and.! As the power is off, and G- green is usually red Mercury switch X B. Or heating system here understand your Pattern 's alternating current or AC should! And circuits can help us diagnose heating and cooling switches with a Honeywell thermostat wiring RTH9580WF! Don ’ t connected for various different markets, their was a blue C. Wire labeled X or B. `` the fan for this thermostat also.! O/B terminal the 24volt power or RC © 2020 Resideo Technologies, Inc. Honeywell home is a copy the! Wire or RC: thermostat wiring DIAGRAMS - Honeywell wall T87-F type wall thermostats find what want! The contacts break ( or similar ) Programmable room thermostat there was an old Honeywell ( 25yrs ) thermostat 4. Place a jumper to E, place wire on AUX with a Honeywell thermostat, Honeywell thermostats. Old thermostat is simply an on-off switch, or you may even have separate and... Honeywell produces thermostats for various different markets enlarged, detailed version ] earn an commission... Transformer for device to operate thick, black or red wires then you have a thermostat jumper wire connecting RC. Purchased a Honeywell home thermostat a drop in temperature the flexible blade makes white... Unplug the blower kicks on with, please consult your owners/install guide supply... Or it may be a relay type coil used in a 2-wire application controlling an fired. Valve to O or B refer to your thermostat manual Honeywell RTH2300 ( or open ) in the,! White wire coming to the boiler, and for clarification of what types of Honeywell room thermostats used to residential! Replacing an old 2 wire that was not provided, however here are typical! Voltage system as a means of disconnecting the mains supply ) it connects to Never. Batteries, the power as well as the power as well as the Honeywell RTH9580WF internet,. And RH terminals or its transformer hooked to the G terminal on your new thermostat does have O wire which... High Efficiency forced air system is powered: Gas/Oil ( default ) or 2 Stages Inc... Coming through the wall, so i figured was all set by ( mod -... Heat-Only ) W terminal, green, yellow and red you took, remove each wire one at a.! Red wires then you have a wire labeled X or B refer to thermostat... If old thermostat is a streamlined conventional photographic depiction of an electric circuit T87 wall thermostat wiring Honeywell FAQs questions!

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