Ecobee 2 wire installation

In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides, wiring diagrams, troubleshooting tips and more. Check compatibility with your HVAC system. Download the ecobee app for step-by-step installation instructions. Download the ecobee app.

Ecobee 2 wire installation. Share. Smharman. • 3 yr. ago • Edited 3 yr. ago. So your aquastat has green and red. Extend thise to the Ecobee on the new 4 core on the green and red and connect to rh and w1. Connect yellow and blue to c and rc. Connect them to the transformer. Connect to wifi. Run through the guided setup.

One 1-wire accessory or one 2-wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV). HVAC accessory support. One 1-wire acc. or one 2-wire accessory. Control an accessory HVAC device like a humidifier, dehumidifier, or ventilation device. ... Professional installation available Call an ecobee pro to help with your ...

As the title suggests, I'm about to install my Ecobee 4 thermostat on my downstairs HVAC. However, as you can see in the picture, I have an additional 2 wires, both titled "T", and the documentation for the Lennox L3021H indicates they are "outdoor temperature sensor connection 1 & 2." Also seen in the picture is the [email protected] 1.877.932.6233 (North America) 1.647.428.2220 (International) Compatible systems ecobee3 works with most centralized residential heating and cooling systems. Heating: up to 2 stages Cooling: up to 2 stages Heat pumps: 1 or 2 stages + up to 2 stages auxiliary heat Accessories: Dehumidifier, humidifier or ventilation deviceThere are five steps to installing the ecobee Smart Thermostat Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface. Step 5: Power up both devices. Installing the Equipment Interface To install the Equipment Interface: 1.If you see a wire connected to your current thermostat's W3 terminal, we recommend booking a pro near you to install your ecobee. Y3: A wire connected to the Y3 terminal on your current thermostat indicates that you have a three-stage cooling system. ecobee thermostats do not support three stages of cooling. One workaround is to place a ...Ring is the only one of our picks to offer both 24/7 monitoring and 24/7 customer service, which is available over the phone. In contrast, SimpliSafe customer service is available only from 8:00 a ...

The ecobee is compatible with two-stage A/C and a two-stage gas furnace. You will need at least 7 conductor wiring to be run from the furnace to the ecobee, with the following conductors to be used: Rc, C, G, Y1, Y2, W1, W2. I would recommend configuring the ecobee to control staging. 3. Reply.Ecobee Smart Thermostat Enhanced: https://amzn.to/3QIlpvuFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we teach you ...Now, you are ready to install the ecobee mounting plate. Connect the four wires into the ecobee wall mount as follows: R wire -> Rc or Rh terminal, G wire -> C terminal, Y wire -> PEK terminal, and W wire -> W1 terminal. Snap the ecobee unit into place. Restore power and confirm that the ecobee is working properly.The other wire is going into a transformer. The valve has a second wire going to the same transformer. Each valve also have 2 red wires, going nowhere. Just not connected. I have plugged the ecobee using the valve wire going to RC and the transformer wire going to C and W1. But, whenever the ecobee wants to call for heat, it shuts down.Installing ecobee with 2 wire boiler system in basement air handler inEcobee4 wiring diagram Ecobee wiring 2nd differentWiring ecobee. Check Details Ecobee4 wiring diagram ecobee installing wire support. Trying to install ecobee, but ran into a wiring issue. : ecobeeWiring help? ecobee support doesn’t seem to have a clue. : …Ecobee Two Wire Install 28 Feb 2024. Help me install my ecobee! (two wire heat only system) : r/ecobee Ecobee thermostat wires Wiring help with new ecobee3 install : ecobee. Ecobee4 Wiring Diagram - Cadician's Blog. Install ecobee without c wire My heat-only system only has two or three wires connected to the Help with wires : r/ecobeeIn this video, I show you how to add a common wire to the thermostat so you can power the ecobee.

After almost 2 years of having the components to set up 2 Stage Thermostat controlled heating, I was finally able to wire it up.Original Ecobee Installation ...Find the Old Wiring. To install your new Ecobee thermostat, you will need to locate the old wiring. The wiring is usually found behind your old thermostat. Carefully remove the cover of your old thermostat to reveal the wires. It’s also a good idea to label your old wiring. This will help you keep everything straight while you’re making ...Step 1: Disconnecting the dumb. Right from the start, Ecobee did a good job with the instructions. They made the process seem simple, which took a lot of the stress out of something that could otherwise seem like a major change to your home. First, we went into the garage to power off the HVAC system (heating, ventilation, and air conditioning).Advertisement Connectors are critical to today's cars. Without them, it would be nearly impossible to build or service a car. Whenever a bundle of wires passes through or attaches ...

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Nest Thermostat 2 Wire Hookup Wiring Diagram for Heating. Both the Nest E and Nest Gen 3 Thermostats can be installed with 2 wires. The procedure to install the Nest thermostat with 2 wires is the same for both thermostats. Turn off the power to your HVAC system. Remove the existing thermostat and mark the wires.When it comes to installing or troubleshooting a Goodman furnace thermostat, proper wiring is essential for optimal functionality and performance. However, there are some common mi...I have a Carrier Comfort 80 furnace and an old 2-wire (RW) thermostat that I'd like to upgrade to an ecobee. Based on ecobee's instructions, I got a Fast Stat Common Maker but after wiring things up as instructed, the ecobee doesn't turn on. Any suggestions would be appreciated.How to install ecobee4. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ...How to install Smart Doorbell Camera (wired) In most homes, installing an ecobee Smart Doorbell Camera is an easy process that takes about 45 minutes. Follow the steps below or scroll further to watch the installation video, find wiring diagrams, troubleshooting tips, and more. Check compatibility with your doorbell system and in-home chime.Our expert installers handle wires and keep heating and cooling systems humming for a living. Let a professional installer set it up and show you how it works. Move it from to-do to done. Save time spent vetting installers and get your ecobee device up and running quickly, at a time that's convenient for you.

Ecobee Thermostat Premium: https://amzn.to/3AmammEFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we teach you how to ...If the Smart Doorbell Camera (wired) is installed without the Chime Adapter, power will be constantly provided to the in-home chime: If you have a mechanical chime, this will continuously drive the hammer forward into the bell, burning out the circuit and causing permanent damage to the mechanical chime.Eventually, this circuit will break, and power within the circuit will stop.How to install ecobee3 lite. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ...Ecobee Thermostat: https://amzn.to/35uLwRhFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we …Installing your ecobee thermostat with a C wire. Check Details. Ecobee3 Smart Thermostat Review - Install, Setup, App, Menus - Page 2. Check Details. Need C-wire For Installing An Ecobee Smart Thermostat - HVAC - DIY. Check Details. ecobee 3 Lite Heat Only 2-wire Boiler w/Oil Primary Control & Aquastat. Check DetailsThe ecobee Smart Thermostat Enhanced and Smart Thermostat Premium can be installed in homes with Air to Air or a Geothermal Heat Pump. Watch this video for h...Find out if an ecobee thermostat is compatible with your 2- or 3-wire heat-only boiler/furnace system, and what you can do to make your system compatible if it isn't directly compatible. ... thermostat wires connect to your heating equipment and then verify those wiring connectors as this determines how to install your ecobee.The Ecobee rep had me do the following with this nutted bundle: Nutted the blue wire from the compressor to the C wire bundle that included the C wire from thermostat and C header on control board. They then had me take the old D1 wire from thermostat and nut it to the W1 and W2 wires coming from control board, which had been nutted together.SmartSensor for doors and windows ($99.99 per 2-pack) The sensor notices that your door or window is open. Learn more about ecobee's SmartSensors for doors & windows. 2. An ecobee smart thermostat. ($169.99 - $329.99) Your thermostat automatically turns off your HVAC system to save money and energy. Learn more about thermostats. Hire a professional installer to get your ecobee thermostats up and running quickly. Find a pro. Option 1: Install using a C wire. Option 2: Repurpose the G wire as the C wire. Option 3: Install the Fast-Stat Common Maker. Testing your system. Since these are non-standard installations, we strongly advise you to test your cooling and heating afterward to make sure everything runs fine.Go to your thermostat and connect the wires from your old thermostat to the ecobee. Don't go by wire color. Connect each wire per the old thermostat connect - Y to Y, G to G, etc. Blue to C. Only once you've landed all the wires and they are secure should you turn your power back on. The ecobee should power up within 30 seconds of restoring power.

This zone control board will work fine with 2 ecobees. At each zone, connect a thermostat wire to terminal X to serve as the Common wire. You can connect the unused green wire in thermostat wire bundle for Zone 2 to the G terminal in zone 1. You will probably need to add a piece of long jumper wire since the green wire is probably too short.

I currently have a zoned system with a fresh air "ventilator" (actually just a fresh air damper) and I want to install an ecobee thermostat. The can either be 1 wire (requires power from the thermostat) or 2 wire (externally powered ventilator) and this is where the confusion begins. On my current thermostat I have two wires going to my fresh ...Installing your ecobee thermostat with the Power Extender Kit (no C wire) 10856 Views • Dec 12, 2023 • Knowledge Configuring your ecobee Thermostat for use with a Geothermal Heat PumpIf two separate R wires come from the wall and attach to the Rc and Rh connectors on the base of your thermostat, you have a dual-transformer system. Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup. How to install ecobee3 lite. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ... Either select "Add a device" in the center of the screen or hit the plus sign on the top right of the screen. Follow the prompts in the Ecobee app to install and configure your thermostat ... FIRST TIME SETUP. I have a new Ecobee3 I'm looking to hook up to a Beckett/Honeywell R7841B heat only furnace that uses a two wire setup. I've reviewed the wiring diagram options on the ecobee3 - Heat only 2-wire boiler/furnace installations site, and hoping to get a bit more info on the installation. Here's a pic of my furnace wire setup: http ... Ecobee wiring help : r/ecobee. Check Details. Ecobee4 wiring diagram. Ecobee thermostat installing ecobee3 restoreEcobee install air control voice Thermostat ecobee wires transformer 24vac commonEcobee install, wiring tips (skill level = 1 beer).Troubleshooting Common Ecobee Wiring Issues. When installing an ecobee thermostat, it is important to check the wiring of the homes existing HVAC system to ensure that the correct number of wires and types are present. Generally, ecobee thermostats need at least four wires: a power wire (typically red), a common wire (typically black), a ...Accessing and using the Test Equipment menu. On the ecobee Thermostat. Go to Main Menu > General > Settings > Installation Settings > Test Equipment, then tap OK to view the Test Equipment menu. Select the equipment you wish to test and then On. Doing so should run the equipment straightaway, but we suggest leaving selected for at least two ...Wire 2: Detach/attach. Installation tip: Make sure all the terminal screws are snug – you don’t have to overtighten them. Follow this procedure until you have attached all necessary wires to the new thermostat. Tip for extra wires: ... ecobee, nest and a few other smart/learning/WiFi thermostats also require 4 wire thermostat wiring.

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Install thermostat ecobee3 mounting hellotech locationsWiring help? ecobee support doesn't seem to have a clue. : r/ecobee Ecobee 2 wire installationEcobee 2 wire install. Ecobee 4 2 wire installationEcobee3 wiring Ecobee 4 wiring diagramEcobee wiring 2nd different. Check Details Ecobee eb wire booting carrier thermostat furnaceThe red wire is used on a ceiling fan installation when the wiring includes two wall switches, in which case one switch operates the light and the other switch operates the fan. If...I recently had a Burnham Independence IN5 boiler installed. Here are the installation instructions for reference (Electrical on Page 16): I have an Ecobee 4 thermostat that i'd like to install. Here is documentation on that: I currently have only 2 wires running to the tstat to switch the boiler on/off. I'm fine with running new wire between ...This is a direct replacement. Simply follow the installation instructions and replace your SmartThermostat with voice control ‡ and thermostat base/backplate with Smart Thermostat Enhanced.. Keep in mind, Smart Thermostat Enhanced only supports one-wire HVAC accessories and doesn’t support an accessory (i.e., a whole-home humidifier, …Step 1: Disconnecting the dumb. Right from the start, Ecobee did a good job with the instructions. They made the process seem simple, which took a lot of the stress out of something that could otherwise seem like a major change to your home. First, we went into the garage to power off the HVAC system (heating, ventilation, and air conditioning). 3. Use 2 #6 pan-head screws or double-sided adhesive to attach the wiring harness to a flat surface (for example, the furnace casing) Step 2. Install diode. The diode is designed to be installed behind the thermostat, within the thermostat’s back panel wire opening. 1. Use your fingers to gently pry the thermostat away from its base. 2. STEP 13: Gently press your ecobee into the backplate until it 'clicks' into place. STEP 14: Turn the power to your HVAC system back on using the master switch or at the circuit breaker box. STEP 15: Say hi to your new ecobee! The screen will power on and guide you through the setup and registration.TIP 2 To install accessories (humidifier, dehumidifier or ventilator) please refer to the wiring diagrams in the 'Extras' section. STEP 6. Unscrew the mounting plate of your old thermostat to remove it from the wall. STEP 7. Decide if you want to use the trim plate with your ecobee.This is a direct replacement. Simply follow the installation instructions and replace your SmartThermostat with voice control ‡ and thermostat base/backplate with Smart Thermostat Enhanced.. Keep in mind, Smart Thermostat Enhanced only supports one-wire HVAC accessories and doesn’t support an accessory (i.e., a whole-home humidifier, …I don't think my comments came up. I need both wires to the humidifier to control the humidity from the Ecobee location. I ran new two wire behind the back plate so its a fresh start from the thermostat back-plate to the furnace board/Humidifier control-solenoid. Just have to pick power, and common. Ecobee Enhanced model. ….

Installation with the Power Extender Kit (PEK) will require you to handle electrical wiring. If you’d rather leave it up to a professional, we can help you fi nd one quickly. ecobee.com/proinstall Install your ecobee without a C wire If you don’t have a C wire, you’ll need to use the PowerThere are five steps to installing the ecobee SMART Thermostat: Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart …Ecobee 3 Lite Installation - No C Wire, only 3 labeled wires on Furnace board. Ask Question Asked 2 years, 7 months ago. Modified 2 years, 2 months ago. Viewed 863 times 1 Trying to install an Ecobee 3 Lite thermostat. The old thermostat had a W, G, R, and Y wire connected, but no C cable which is needed. ...Wiring diagrams would be even better. Install both a separate 24v transformer and an isolation relay with a 24vac coil at the boiler. Use the separate transformer to power the Ecobee3 thermostat and use the Ecobee3 to energize the new 24vac relay coil. Use the new relay to provide a set of dry contacts for switching the existing 12v controls ...ecobee thermostats require a C (common) wire to power on. But you see standard connectors on your thermostat ( R , G , W , etc.) and there are only two or three wires leading from your thermostat behind the wall, a few installation options are available.Hire a professional installer to get your ecobee thermostats up and running quickly. Find a pro.Our expert installers handle wires and keep heating and cooling systems humming for a living. Let a professional installer set it up and show you how it works. Move it from to-do to done. Save time spent vetting installers and get your ecobee device up and running quickly, at a time that's convenient for you.Measuring both occupancy and temperature, sensors signal your ecobee Smart Thermostat to automatically switch to the right mode for comfort when you're home or for savings when you're not. One Room Sensor included, 2-pack sold separately. EASILY INSTALL YOURSELF: It only takes about 30 minutes, thanks to an easy to follow installation guide ... Ecobee 2 wire installation, 1-866-518-6740. Smart Thermostat Premium works with most centralized residential heating and cooling systems. Heat pumps: Air, Water, and Geothermal with up to 2 stages, and 2 stages of AUX heat. Accessories: Dehumidifier, humidifier, or ventilation device. Fan coil units: 2- and 4-Pipe with up to 3 fan speeds., Sale > ecobee 2 wire thermostat > in stock Best smart thermostat 2020: never touch the temperature dial again Installing ecobee 4 Wiring ecobee ... Installing an ecobee4 my parents Ecobee thermostat installing ecobee3 restore Ecobee3 wiring install pek wire power ecobee extender kit heat pump air if. Ecobee extender thermostat ecobee3., A subreddit for ecobee and all their smart home products. Members Online • walnutheadgus. ADMIN MOD C wire installation question Hi there! I was taking a look at my furnace wires and I can see I have an existing blue C wire connected. ... The yellow wire from your furnace that's connected to Y should connect to 2 other wires. One to the Y ..., Page 22 Install the remote sensor Using the materials provided, install the remote sensor in one of three ways: Option 1. Option 2. Option 3. Attach to a wall Attach to a wall Place on a flat using the screw using the adhesive surface using the provided., Weil mclain transformer-relay wiring diagramEcobee3 wiring Sale > ecobee 2 wire thermostat > in stockEcobee3 wiring install pek wire power ecobee extender kit heat pump air if. Sale > ecobee 2 wire thermostat > in stockWiring for ecobee 3 lite : ecobee Help needed on thermostat wiring with ecobee and fast-stat 5000 - loveHelp with wiring : r ..., Your setup is compatible with the ecobee thermostat, but you are required make a few adjustments in order to get the thermostat to power on. You need a C wire to power on the ecobee thermostat. There are three options you can do: Run an extra wire for the C wire. But first, we need to figure out where to connect the C wire at your heat system side., 3.2 CHECKPOINT: C WIRE; 4 GUIDE 1: Install your ecobee with a C-wire. 4.1 CHECKPOINT: DON'T SKIP AHEAD; 4.2 CHECKPOINT: INSERT YOUR R WIRE(S) 5 GUIDE 2: Install your ecobee without a C-wire. 5.1 CHECKPOINT: DON'T SKIP AHEAD; 5.2 CHECKPOINT: 3 OR 4 WIRES; 5.3 CHECKPOINT: POWER EXTENDER KIT; 6 TROUBLESHOOTING; 7 MEET YOUR ECOBEE. 7.1 Here's what ..., The thermostat has a PEK terminal which digitally combines the G and Y1 signal. The PEK device, which gets installed at the equipment, separates that combined signal back into separate 24v wires. The PEK can go from 5 to 6 wires or from 8 to 9 wires. It can always add one more wire to the available wires., How to install your ecobee. 1. Download the ecobee app. The ecobee app has instructions, step-by-step videos, and diagrams customized to your wiring setup. Register your ecobee after installation to unlock smart features like Amazon Alexa. 2. Important Information. Look out for these icons at the bottom of each step., During setup, the ecobee app will guide you through each step to let you know if your system is compatible before you install it. The majority of ecobee thermostat owners are able to power their ecobee thermostat with the common wire (C wire) or the ecobee Power Extender Kit (PEK), a simple-to-install device that comes in the box and attaches ..., Learn how to set up your ecobee3 lite with this tutorial video., Here we will be discussing how to install Ecobee3 lite thermostat with a power extender kit. STEPS TO FOLLOW: STEP 1 - Keep your HVAC system turned OFF. STEP 2 - Go to your thermostat and take a picture of the arrangement of wires. STEP 3 - Similarly, take a picture of the control board wiring., Install ecobee SmartThermostat Pro with voice control in 30 minutes or less to deliver greater comfort, advanced control, and increased savings to your custo..., Comfort without compromise. ecobee Smart Thermostat Enhanced learns your temperature preferences and your schedule, so your home is just the way you like it. Automatically lowers the temperature when you’re sleeping to keep you cool and comfortable. Pre-cools or pre-heats your home before you arrive, so it’s comfortable the moment you walk in., Ecobee 3 lite heat only 2-wire boiler w/oil primary control & aquastatEcobee3 lite smart thermostat install and review Need c-wire for installing an ecobee smart thermostatInstalling thermostat ecobee wire smart need. ... Trying to install ecobee, but ran into a wiring issue. : ecobee. Check Details. Ecobee wiring help : r/ecobee. Check Details., Page 6: Installing The Ecobee Smart Thermostat. INSTAllING THE SMART THERMOSTAT There are five steps to installing the ecobee Smart Thermostat Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface., 2 Wire systems will require a 24v AC transformer which it sounds like you got; This is where you will want to run the wires. 24v Power transformer wire_1 (either wire, polarity doesn't matter on AC power) > RC . 24v Power transformer wire_2 > C . Old stat wires Red > RH, I don't think my comments came up. I need both wires to the humidifier to control the humidity from the Ecobee location. I ran new two wire behind the back plate so its a fresh start from the thermostat back-plate to the furnace board/Humidifier control-solenoid. Just have to pick power, and common. Ecobee Enhanced model., Hire a professional installer to get your ecobee thermostats up and running quickly. Find a pro., Connect the PEK at the control board but then the EZ trap and condensate pump will go through the PEK wiring module at R. Also, the Y wire will have the AC white wire connected to the PEK. Connect the PEK where the wire nuts are but I will have to connect the C wire from the PEK to the blue C wire, white Humidifier wire and red AC wire., Live View. View the Live View Stream from your ecobee Smart Doorbell Camera (wired) by tapping on the Smart Doorbell device tile on the Home Overview screen in your ecobee app. The 1080p video streaming quality and 175° vertical field of view give you a head-to-toe view of any activity outside your front door., Guide 1: Install with a C-wire Guide 2: Install without a C-wire Extras 5 7 14 29 54. ... Install your ecobee without a C wire If you don’t have a C wire, you’ll, Advertisement Connectors are critical to today's cars. Without them, it would be nearly impossible to build or service a car. Whenever a bundle of wires passes through or attaches ..., Learn about its installation, design and features. Save up to $180 per year and streamline your heating and cooling system with the ecobee SmartThermostat. Search for:, My ecobee came with an adapter that allowed me to use one of the existing wires as a c wire. I believe the adapter comes standard with most of their thermostats. It was fairly easy to install. You will need to have some understanding of wiring diagrams so that you can identify the appropriate wire to use., If two separate R wires come from the wall and attach to the Rc and Rh connectors on the base of your thermostat, you have a dual-transformer system. Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup., Installing ecobee with 2 wire boiler system in basement air handler inSale > ecobee 2 wire thermostat > in stock Wires ecobeeEcobee ecobee3 diagrams humidifier ventilator dehumidifier. Check Details. Wiring help with new ecobee3 install : ecobee, SmartSensor for doors and windows ($99.99 per 2-pack) The sensor notices that your door or window is open. Learn more about ecobee's SmartSensors for doors & windows. 2. An ecobee smart thermostat. ($169.99 - $329.99) Your thermostat automatically turns off your HVAC system to save money and energy. Learn more about thermostats., How to install ecobee3 lite. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ..., Wire R and W from the relay box to Rh and W/W1 on the Ecobee, while leaving the relay's C terminal unused. Then wire the secondary of the separate transformer to Rc and C on the Ecobee. The Ecobee will figure all the rest out by itself, running off of the separate transformer on Rc while switching power from Rh to W to control the heat., Wire Confusion - installation (2Y and 2 . Pictures attached. I am trying to install my new ecobee. It seems I require the PEK as I don't have a C wire on my thermostat. In the control board I have 2 wires going to Y and two wires going to R at my furnace. I cannot put both wires in the PEK as the hole is too small for two wires., Install your ecobee without a C wire If you don't have a C wire, you'll need to use the Power Extender Kit (PEK) included to reliably power your ecobee. GUIDE 2 Guide 2. RC RH RC RH YES NO YES NO The Power Ext YES NO Continue to the next page ender Kit will work with your system!, Take a photo of the PEK installation and close the furnace panel, you can wire the ecobee now as follows: R wire to the RC terminal; G wire to the C terminal; Y wire to the PEK terminal; W wire to the W1 terminal; Place your ecobee on the wall mount, restore power to your HVAC system and the ecobee will now guide you through configuration.