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Honeywell thermostat wiring 5 wire - Thermostats are in every household, but have you ever wondered how they work? Learn about thermostats and take a look in

The Honeywell ST9400C manual is an essential resource for anyone

This thermostat works with common 24 volt systems such as forced air, hydronic, heat pump, oil, gas, and electric. It will not work with millivolt systems, such as a gas fireplace, or with 120/240 volt systems such as baseboard electric heat. MERCURY NOTICE: Do not place your old thermostat in the trash if it contains mercury in a sealed tube.I am replacing a Lux thermostat with a honeywell. There were 5 wire connected to the Lux in the following order. O to O - Answered by a verified HVAC Technician. ... I am wiring in a new thermostat it is a honeywell rth6450. the system is a goodman avptc42d14ab air handler the condenser is dszc160361ae, ...Honeywell Thermostat Wiring Diagram 4 Wire Examples. The table above provides a more complete list of Honeywell thermostat wiring colors and their uses. But here is a list of the most common wire color mappings, as seen in many four wire t-stat setups. C - 24 VAC Common (You might see blue, purple, or brown typically used for this wire).Step 2: Remove the old thermostat cover and safely disconnect the wires. Step 3: Capture a photo or create a wiring diagram for reference. Step 4: Identify wire functions (e.g., red for power, white for heat). Step 5: Connect wires to corresponding terminals on the new thermostat. Step 6: Mount the thermostat, restore power, and test the system ...Help ensure comfort and sustainability with this ENERGY STAR® certified smart home thermostat. Discover Savings with Utility Rewards. SELECT A MODEL: T9 Smart Thermostat and Sensor with C-Wire Adaptor. $209.99. In Stock. or 4 interest-free payments of $52.50 with. Add To Cart. Works with Resideo App.The Honeywell 8000 thermostat is a popular choice for homeowners looking to upgrade their heating and cooling systems. With its sleek design and advanced features, this thermostat ...White T5 Touchscreen Thermostat. SKU: RTH8560D1002/E. 2.6. |. 32 Reviews. 11 out of 30 (37%) reviewers recommend this product. Write a Review. Maintain Your Ideal Temperature This Honeywell Home T5 Touchscreen 7-Day Programmable Thermostat features a crisp, clear touchscreen for intuitive setup and use.Knowing how to install a thermostat may include understanding some wiring basics such as installing a c-wire. Smart thermostats can have up to five thermostat wires that always include a "common wire" or C-wire. The C-wire provides a continuous flow of power to the thermostat without necessarily turning your other appliances (such as the fan or cooling) on or off.If you have an older home with an outdated thermostat, you may be missing out on the many benefits that come with upgrading to a newer Honeywell thermostat. One of the key benefits...Here is how my wiring ened up: Item Thermostat Inside Outside. Comp Activity Y Y (Yellow) 24V Common B B C (Brown) Fan E G. 24V Hot R R R (Red) Aux Heat W W D (Purple) Energize to Cool O B (Blue) The last wire on the Ruud Outside unit is not connected, becaue it is.Honeywell thermostat wiring 5 wire / 5 wire old honeywell thermostatHoneywell thermostat t8411r wiring diagram Honeywell heating thermostat underfloor boiler combi heat port flameport actuator circuit ambrastaHoneywell wire thermostat iaq diagramweb wires saver lennox replacing configure diynot specific.Thermostat wiring details & connections for nearly all types of Honeywell room thermostats used to control residential heating or air conditioning systems. This article gives a table showing the proper wire connections …VisionPRO® 8000 w/ RedLINK® Multistage T-stat, Humidity Sensor. SKU: TH8321R1001/U. Simplify Your Whole Home Comfort. The VisionPRO® 8000 RedLINK® programmable thermostat allows homeowners to manage their entire home comfort system through one easy-to-use interface. With RedLINK wireless technology, the thermostat allows use with …Where do I wire my C wire on the series 2000 thermostat? Last updated. 2/22/22. The RTH2300 series does not allow for a C wire connection and the C wire should not be use. Tape the wire off with electrical tape and tuck it back in the wall.W-wire - white wire. this wire goes to the gas controls to engage the heat on a call for heat from the thermostat when you have it set to heating mode. This closes the 24-volt control side of the gas furnace and begins the process of starting the gas furnace into its sequence of operation. Y-wire - yellow wire typical color.If you are still unsure if your new thermostat is wired correctly, please contact Honeywell Customer Care at 1-855-733-5465. No C-Wire? Use a C-Wire Adapter.In the case of the Honeywell TH3210D1004 thermostat, the wiring diagram will typically include terminals such as R, C, W, Y, G, and O/B. These terminals correspond to the different wires that connect your thermostat to the heating and cooling system. For example, the R terminal is usually connected to the transformer and provides a power source ...Feb 4, 2023 ... The Honeywell Digital Thermostat is an excellent thermostat for your home. ... 5:53 · Go to channel · How To Install A ... Do you need a C-wire?No central heating control. 5. Lux GEO-WH Wi-Fi Thermostat. While not the most stylish smart thermostat, the Lux GEO-WH Wi-Fi Thermostat is a safe bet if you've tried other smart thermostats without a C wire that aren't compatible with your heating system. It can be powered via two AA batteries, micro-USB, or C wire.SKU: RTH6360D1017/U. Programmable Comfort. You can schedule comfort throughout the week and weekend with the Honeywell Home 5-2 Day Programmable Thermostat. It has Smart Response Technology, so it continually adjusts heating/cooling to be the right temp at your programmed time. SELECT A MODEL:See Fig. for wiring diagrams for.FocusPRO™ THD Non-programmable Digital Thermostat 3 Remove the wallplate from the ther-mostat as shown at left,then follow directions below for mounting. 1 Pull wires through wire hole. 2 Position wallplate on wall,level and. Honeywell THD - Basic Pro Non-Programmable, 1H/1C, Vertical Thermostat - Features ...Thermostat Wiring and Wire Color Chart - Thermostat Wiring Colors Code; Tstat Terminal Designation: Color of Wire and Termination: R - The R terminal is the power. It is a red wire and comes from the transformer usually located in the air handler for split systems, but you may find the transformer in the condensing unit.Welcome to the world of comfort and energy savings with your new Honeywell Programmable Thermostat. Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy. Weekday/Weekend (5-day/2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Mounting Plate Model ...Various system configurations and thermostat wiring including 4 wire, 5 wire and 7 wire thermostats are discussed on this page. ... Troubleshoot a Honeywell Thermostat; Best Thermostat Setting for Summer and Winter; Call 888-894-0154 to Get Free Quotes From Local Pros.X connectors are usually found on older Honeywell devices, the most common being: Honeywell T874 and T874R thermostats. Honeywell Q674 and Q674L subbases. Honeywell Q674L. If you have one of the models listed above, you can attach the X wire to the C connector on the ecobee to power the thermostat. Otherwise, it is best to check your thermostat ...5 Take a picture of how your wiring looks right now. Be sure to include the letters next to the terminals where the wires are inserted. This will be a helpful reference when wiring your thermostat. Tip: If the color of your wires has faded or if 2 terminals have the same wire color, use the wire labels provided in the package to label each wire.Aug 25, 2023 · 5-wire thermostat wiring. The 5-wire thermostat wiring can be found in any HVAC device, including the best Amana heat pumps, furnaces, top air conditioners, etc. There’s not much difference between this kind of wiring and 4-wire wiring. The only difference between them is the presence of a “Common” or “C” wire in the 5-wire …The C wire, or “common wire” enables the continuous flow of 24 VAC power to the thermostat. Technically speaking, power flows from the R (red) wire, but not continuously (not on its own, anyway). To make it continuous requires a common wire to complete the circuit. When the circuit is complete, 24V energy will flow continuously.Last updated. 5/12/23. No, the Honeywell Lyric T5 WiFi Thermostat requires a C wire or Common wire be connected to the C terminal in the thermostat and at the equipment terminal. The C wire or Common wire is needed to provide 24-volt power to your Honeywell T5 WiFi or connected thermostat. There is a temporary solution and a couple of permanent ...Confirm you have a C wire in the C terminal. If your previous thermostat did not use a C wire, it's unlikely that it is connected at the equipment. Verify the C wire is connected to the C terminal in your furnace or air handler. Check your jumper selector switch. If you have a wire in the R terminal and no wire in the RC terminal, verify the ...Jul 16, 2021 ... ... 5:20 Checking Relays, Fuses, Thermostats, etc ... Basic Thermostat Wiring - How to Wire HVAC Thermostat ... Wire) & What It Does For Smart ...The Honeywell 7 wire thermostat wiring diagram is a comprehensive diagram that shows the correct connections for each wire. This diagram is especially helpful if you are replacing an old thermostat and need to know which wires correspond to each terminal on the new thermostat. By following the diagram, you can ensure that your thermostat is ...Verify that the wiring was matched correctly from the old thermostat to the new thermostat. If there are no separate wires to R and Rc, these terminals must be connected. On some thermostats, this connection is made by a jumper wire connection; on other models this connection is made by a slider switch that has 1-wire and 2-wire settings.Hotop 24 Volt C Wire Adapter for Smart Thermostat, UL Listed 16.5ft Long Power Connector C Wire for All Versions of Smart Thermostat Compatible with Nest, Honeywell, Ecobee, Wyze, Sensi Brand: Hotop 4.4 4.4 out of 5 stars 2,914 ratingsRTH6360D1002 Honeywell home T3 / home owners thermostat get it at most home improvement stores. How to wire it up and configure it to your specific needs wea...May 24, 2020 ... ... Thermostats. One Hour Smart ... Basic Thermostat Wiring - How to Wire HVAC Thermostat ... Upgrading from a 4 Wire Thermostat to a 5 Wire Thermostat.Help ensure comfort and sustainability with this ENERGY STAR® certified smart home thermostat. Discover Savings with Utility Rewards. SELECT A MODEL: T9 Smart Thermostat and Sensor with C-Wire Adaptor. $209.99. In Stock. or 4 interest-free payments of $52.50 with. Add To Cart. Works with Resideo App.If you have an older home with an outdated thermostat, you may be missing out on the many benefits that come with upgrading to a newer Honeywell thermostat. One of the key benefits...There should be no problem connecting the C wire from your thermostat to the C terminal in the furnace. Take a look at this diagram, which is a rough approximation of your system. Notice the cable going to the condensing unit has a red wire connected to the Y terminal in the furnace, and a white wire attached to the C terminal. When the thermostat calls for COOL, it does so by energizing the Y ...A C-Wire Adapter replaces the need for a C-Wire. The C-Wire Adapter is included in newer Honeywell WiFi Thermostats. If you own an older thermostat model, you can purchase a C-Wire Adapter here.Choose this cable for a dependable thermostat wiring solution. Additional information. Wire Length: 100', 25', 250', 2500', 50' Package Quantity: Cut, Roll, Speed Bag. UPC: ... -Honeywell 136434BA 16in Ionizer Wire for Electric Air Cleaners quantity + Add to cart. Non-Shielded, Stranded Plenum-Rated Cable, 1000ft. Honeywell. SKU: NSP-16/2 $ 265.00.5 Take a picture of the old wiring Be sure to include the letters next to the terminals where the wires are inserted. This will be a helpful reference when wiring your Lyric thermostat. RC R Example of a jumper Terminals 6 Remove any jumpers A jumper connects one terminal to another terminal. It may look like a small staple or even a colored ...White Rodgers 5-Wire 1F90 Thermostat wiring diagrams. 5-Wire heating & cooling control wiring using a White Rodgers 1F90 thermostat. White Rodgers / Emerson P150 Thermostat Wiring Tables. ... WHITE RODGERS 5D51-78 LIMIT CONTROL SPECIFICATIONS [PDF] (also lists the Honeywell L4064 Lmit Control) WHITE …Patrick, typically the three wire thermostat hookups would be exactly the same for the old and new thermostats. For details of wiring a typical and simple digital Honeywell thermostat, see Honeywell 5-2 Day Programmable Thermostat - RTH2300B1012. For help in understanding the wiring of your old thermostat,That is how you are going to wire your nest or honeywell thermostat. To simplify this wiring task I have put together how you are going to wire the thermostat to the air handler and how you will wire it directly to your outdoor unit. Read also: Old Trane Thermostat Wiring To New Thermostat [Full Guide] Let's take a closer look :1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat SupportThis is how to wire a pro 3000 thermostat for heat pump use. This thermostat could be used if you did not have to use a backup heat such as a furnace or emer...Installation Guide 4. Wiring. 1 Loosen screw terminals,insert wires into terminal block,then re-tighten screws. 2 Push excess wire back into the wall opening.Keep wires in shaded area as shown at left. 3 Plug the wall opening with non- flammable insulation to prevent drafts from affecting thermostat operation.Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to match your heating/ cooling system – This thermostat works with virtually all System Types – It is preset for the most common system We are here to help. Call 1-800-468-1502 for wiring assistance before returning the thermostat to the ...We are here to help. Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store. 1 69-2416ES—05. 1Turn Off Power to Heating/ Cooling System. M28097. 69-2416ES—05 2. Remove old thermostat but leave wallplate with wires attached. 2Remove Old Thermostat.The Sensi app provides all the installation instructions for wiring your new thermostat. Download the Sensi app on your smart phone or tablet. Create an account or sign in. Tap the + sign. Tap your Sensi product. Tap " New Installation ". Tap “ Not Mounted ”. Follow the in-app setup and wiring instructions.Step-by-Step Guide to Wiring the Honeywell Round Mercury Thermostat. Wiring a Honeywell Round Mercury Thermostat may seem daunting at first, but with a little guidance and the right tools, it can be a straightforward process. Here is a step-by-step guide to help you wire your thermostat correctly: Step 1: Safety FirstAbout Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Honeywell thermostat 4 wire wiring diagramHoneywell home thermostat wiring diagram Thermostat wiring honeywell switch limit hvac heater thermostats wires heatpump electrical annawiringdiagram inspectapedia baseboard t87 condenser schematron 240v saver wiredHoneywell thermostat wiring diagram 4 wire.Old Bryant to new Honeywell wiring help. Hi, I am trying to replace an old Bryant heat pump thermostat with a Honeywell RTH8580WF. The Bryant thermostat has the following terminals with individual wires: Y, G, R, O, W1, W2, E, and C. There is an F terminal but it does not have a wire. The system has an Emergency Heat feature that appears to be ...Wireless App allows you to manage an unlimited number of Honeywell Wi-Fi Thermostats; Works with Alexa, Google Assistant, Samsung SmartThings, IFTTT, Bonomi, Wink, and Stringy (devices sold separately) ... My husband drilled a hole just above the baseboard and threaded the wire from the thermostat down to the hole. We then plugged the adapter ...Oct 11, 2023 ... Why You Should Have 5 Wires At The Thermostat? www.genuine-comfort.com https://www.amazon.com/dp/B0CLWX9L7Y.Description. The C-Wire provides a continuous flow of power to operate more advanced 24-Volt thermostats and is most often needed when upgrading to Wi-Fi and wireless thermostats. The C-Wire Power Adapter converts existing thermostat wires to common wires (C-Wires) to help make Honeywell Home Smart Thermostats compatible with …Non compatible avec les chauffages de plinthes électriques (120 à 240 V) Compatible avec la plupart des systèmes de chauffage, refroidissement et thermopompes En option : Alimentation de 24 V c.a. (fil C) L'utilisation d'Apple HomeKit avec votre thermostat Lyric requiert une alimentation de 24 V c.a. (fil C).24Volt Transformer C Wire Adapter for Thermostat and All Versions of Ring Doorbell, Compatible with Nest, Ecobee, Honeywell, Sensi, Sensi Smart WiFi Thermostat, Nest Hello Doorbell Supply Cord dummy 24 Volt Transformer, 500mA C Wire Power Adapter Thermostat, Competible with Nest, Ecobee, Sensi, Honeywell Doorbell and Any Doorbells, Extra Long ...5 wire thermostat wiring diagram Thermostat wiring rodgers furnace honeywell rogers payne schematic cooling hubs dometic wires 1f79 inspectapedia ignition rotork diagramweb thermostats emers ... Thermostat wiring diagram wire honeywell heater ac voltage fan room low chromalox hvac ptac switch green diagrams heat schematic capacitorHow to wire a ...Most often, the wires will be held in place with a small screw. You may find it helpful to have a small Phillips head screwdriver and small regular screwdriver handy to remove the wires from the old thermostat. Some thermostats also use push in terminals which have a release button that needs to be pressed gently with a ballpoint pen or small ...1 Answer. The RTH9585WF should have a Rh/Rc jumper from the factory, if it is missing then you must add one. If you use the green wire as a "c" wire you need to change it on the thermostat and in the air conditioner. You will lose the "fan only" option at the stat.If your old thermostat had both R and RH wires, set the R Slider Tab to the down position (2 wires). Then connect the R wire to the Rc terminal, and the RH wire to the R terminal. …Check the plate with a level, and mark the screw holes with your pencil. If applicable, drill guide holes before adding anchors to the wall. Pull the wires through the opening of the thermostat's backplate. Attach the back plate to the wall with the provided screws. Check to make sure the thermostat is secure.Hi all, My home has a Honeywell L7224 aquastat controller which is connected to a couple of two-wire Hunter battery-operated thermostats, which I am looking to replacing with Honeywell RTH9585WF Smart Thermostat (wifi) which require a C wire.At my skill level I can run wires so I'm not concerned about that. Unfortunately the L7224 doesn't have a obvious C wire connection but I found an old but ...Jan 1, 2019 ... ... 5 years ago #honeywell ... How to Install Honeywell Lyric T5 Wi-Fi Thermostat w/without C Wire! ... How to Install Honeywell Smart WiFi Thermostat ...How I solved my no C wire problem when installing a Honeywell Wifi thermostat. Model #RTH9585WF1004/Usupplies needed;thermostat, https://www.lowes.com/pd/Hon...RCHT8612WF2015/U, SMHOM8610KIT, RCHT8612WF2015/W, RTH8800WF2022/U, RCHT8610WF2006/U. Download Manual Download Installation Guide. Download Service Datasheet. T5 SMART THERMOSTAT Product Page.How To Install a 3 Wire Line Voltage ThermostatTo pair the Honeywell DT90 thermostat to your heating system, follow these steps: 1. Make sure the thermostat is inside the building where the temperature is between 0 to 40°C. Avoid locations with high moisture levels. 2. Place the thermostat on an interior wall, 1.2 to 1.5 meters from the floor, with good air circulation at room temperature.Description. The C-Wire provides a continuous flow of power to operate more advanced 24-Volt thermostats and is most often needed when upgrading to Wi-Fi and wireless thermostats. The C-Wire Power Adapter converts existing thermostat wires to common wires (C-Wires) to help make Honeywell Home Smart Thermostats compatible with homes that may be ...Honeywell Thermostat Wiring Diagram 4 Wire Examples. The table above provides a more complete list of Honeywell thermostat wiring colors and their uses. But here is a list of the most common wire color mappings, as seen in many four wire t-stat setups. C - 24 VAC Common (You might see blue, purple, or brown typically used for this wire).Oct 16, 2023 · Step 2: Remove the old thermostat cover and safely disconnect the wires. Step 3: Capture a photo or create a wiring diagram for reference. Step 4: Identify wire functions (e.g., red for power, white for heat). Step 5: Connect wires to corresponding terminals on the new thermostat. Step 6: Mount the thermostat, restore power, and test …Non compatible avec les chauffages de plinthes électriques (120 à 240 V) Compatible avec la plupart des systèmes de chauffage, refroidissement et thermopompes En option : Alimentation de 24 V c.a. (fil C) L'utilisation d'Apple HomeKit avec votre thermostat Lyric requiert une alimentation de 24 V c.a. (fil C).2. Honeywell Smart Thermostat Wiring: Remove Old Thermostat / Faceplate. Remove the old thermostat unit from its holder plate. Most thermostats nowadays detach from a wall mounting plate. This allows simple wire hookups, with low risk of thermostat damage. 2-1. Take Picture of Old Thermostat Wiring.The OLD thermostat had five wires connected to it at the following terminals - Y, R, C, G, and W. See picture below: The instruction manual for the RTH2510 tells me to connect wires to the following terminals - Y, R, G, and W. It doesn't tell me what to do with the remaining C wire. Additionally, there is no C wire terminal on the new ...5/12/23. The T5/T6 pro WiFi thermostats do require a common wire, also known as a "C" wire. The "C" or common wire allows the thermostat to power itself, instead of using batteries. It must be connected to the C or common terminal on the furnace control board. Buy a c-wire adaptor here.Y – Yellow: Cooling Mode. This wire runs to the furnace control board which in turn controls the activation of the compressor and related components required for AC. G – Green: This wire controls the blower motor in the furnace. Y2 – Light Blue: This wire is necessary if you have a two-stage AC compressor.If you have an older home with an outdated thermostat, you may be missing out on the many benefits that come with upgrading to a newer Honeywell thermostat. One of the key benefits...What timers work with a 2 wire installation? Skip to main content. ... Thermostat Replacement; Thermostat Wiring Compatibility; ToP SEARCHED PRODUCTS ... Saturday and Sunday: 9am - 5:30pm CDT. Online Order Support and Customer Service 1-800-664-2751 Open Hours:Option 3: Choose a thermostat that includes an adapter. Pictured: ecobee3 lite, one of our favorite thermostats. Even though it comes with an adapter for missing c-wires, ecobee is what we'd pick even for systems with a c-wire. If you've got a 24v HVAC system but no C-wire, check out the ecobee product line. Every ecobee ships with an ...Consult your owners/install guide for wiring examples and systems compatible with your thermostat*. The thermostat uses one wire to control the primary functions of your …SKU: TH8321WF1001/U. 2.9. |. 118 Reviews. 20 out of 72 (28%) reviewers recommend this product. Simplified climate control. Featuring a large touchscreen display, the VisionPRO® 8000 WiFi Programmable Thermostat simplifies home climate control. Program a schedule for every day of the week or adjust the temperature remotely from our mobile app.wire honeywell rth111 thermostat to carrier fk4cnf005 electric furnace Read More. Thermostatic Controls. Thermostat Wiring Compatibility B. b.arnav on Jun 11, 2022. Hello, Looking for some help with my current wiring and if it is feasible for me to upgrade my thermostat to a smart thermostat. Current Thermostat - White Rodgers 1F83-0431 Desired ...Wireless App allows you to manage an unlimited number of Honeywell Wi-Fi Thermostats; Works with Alexa, Google Assistant, Samsung SmartThings, IFTTT, Bonomi, Wink, and Stringy (devices sold separately) ... My husband drilled a hole just above the baseboard and threaded the wire from the thermostat down to the hole. We then plugged the adapter ...We are here to help. Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store. 1 69-2416ES—05. 1Turn Off Power to Heating/ Cooling System. M28097. 69-2416ES—05 2. Remove old thermostat but leave wallplate with wires attached. 2Remove Old Thermostat.Step 5: Connect the wires to the thermostat. With the wires properly identified and labeled, you can now connect them to your new Honeywell Smart Thermostat. Follow these steps: Refer to the manufacturer's instructions that came with your Honeywell Smart Thermostat to identify the terminals on the device.If you have an old Android phone sitting around collecting dust, and you've been pining for smart, Honeywell thermostat 4 wire wiring diagram. Thermostat wiring honeywell , Aug 3, 2023 · Honeywell 6 Wire Thermostat Wiring Diagram. As I mentioned earlier, a 6-wire th, When it comes to troubleshooting Honeywell thermostat wiring problems, it's impo, Visit https://bit.ly/2RCgPCe for more information about the Honeywell Home RTH221B thermostat.This video, 2. According to the wiring diagram I found, typical wiring is as follows. 1 END SWITCH (To circulato, I am Wiring a New Honeywell RTH6580WF Thermostat but there is no Yellow, IV. Remove uninsulated wires from the thermostat. Remove inte, Easy push terminals and a magnetic mount make installation quic, SKU: THX9421R5021WW/U. One Thermostat. Advanced Wh, The question is: How to Wire an Air Conditioner for Control, Honeywell Home T9 WiFi Smart Thermostat with 1 Smart Room Sensor, T, Option 2: Repurpose An Extra Wire. If you don't want to go throu, Honeywell Thermostat 4 Wire Wiring Diagram - Tom's Tek S, Connect the yellow wire from the new thermostat cable, t, The five wires used in the wiring diagram for a Honeywell, 5. Use the New Backplate as a Template. Use the new thermostat&, The video tutorial demonstrates how to install repl.