How To Install Ecobee SmartThermostat 2021 With 4 Wires, No C Wire

Ecobee Thermostat: amzn.to/35uLwRh
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In this video we teach you how to install the Ecobee thermostat with the PEK or Power extender kit. When your existing thermostat does not have a common wire. In the video we install the Ecobee thermostat on a typical 4 wire system with heating, cooling and fan control with the (R, G, Y and W) wires.
In this configuration the Power extender kit or common wire adapter kit are required for Ecobee installation.
The Ecobee Thermostat is currently the highest end model in the Ecobee lineup. It allows you to remotely control your HVAC system from your phone. The Ecobee Thermostat is also compatible with Alexa, Siri and Google Home voice commands.
You can also connect room temperature and occupancy sensors to the ecobee thermostat to remotely monitor the temperature throughout your home and better manage the temperature in different parts of your home.
The Ecobee Thermostat also has Alexa built in directly in the Thermostat so that if you want to speak Alexa commands directly to the Ecobee Thermostat you can do so with the built in Alexa microphone and speaker on the Ecobee.
(VIDEO): How To Use Ecobee Thermostat: • Ecobee3 Lite Manual | ...
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To Install The Ecobee Thermostat:
1. Turn off the power to your existing HVAC system
2. Remove the existing thermostat cover, confirm the wiring and take a picture.
3. Take a picture of the wiring and then go to your HVAC system to install the PEK Kit.
4. Install the PEK (Power Extender Kit) or common wire kit at the HVAC system.
5. Remove the existing thermostat and wiring.
6. Install the new Ecobee Thermostat wall plate and baseplate.
7. Install the thermostat wiring into the Ecobee base plate. In this example the wires should go in the new designations (R to Rc , W to W1, Y to PEK, G to C)
8. Install the Ecobee Thermostat on the baseplate.
9. Turn the power back on at your HVAC system.
10. Follow the setup instructions and connect the thermostat to wifi.
11. Connect the Ecobee Thermostat to your phone.
12. Congratulations your Ecobee Thermostat is setup and installed.
Videos produced by One Hour Smart Home are provided for informational purposes only. All material provided within this website or youtube channel is for informational, educational, & entertainment purposes only. Some of these projects, materials, and techniques may not be appropriate for all ages or skill levels. Please use use all safety precautions when performing a DIY project. One Hour Smart Home does not make any claims of the safety of the projects, techniques, or resources listed on this site and will not take responsibility of what you do with the information provided by this site or youtube channels. Viewers must be aware by doing projects on their homes they are doing it at their own risk and One Hour Smart Home cannot be held liable if they cause any damage to their homes, themselves or others. With different codes around the world and constantly changing standards, regulations and rules, it is the sole responsibility of the viewer to educate themselves on their local requirements and codes before undertaking any sort of project. Hire competent professionals when needed to perform a task which you are not or do not feel qualified for. Use at your own risk. Links included may be affiliate links which help support this channel.

[@ericschmidt7351]

For a heads up for anyone in my same situation. My thermostat didn't have a C connection on it. I went to my HVAC to install the PEK, and realized I did have a C cable coming out of the thermostat cable housing (the end was disconnected and wrapped around the housing itself), as well as a C cable coming from the main control box. I went back to go check my thermostat, and turns out the C wire was taped off and sitting behind my thermostat, unconnected. So, my system was in fact set up for the C cable, it's just that my thermostat didn't use it. Back at the HVAC I spliced the C cable coming from the thermostat housing to the C cable coming out of the main control box. Proceeded to setup using the C cable instructions, and it worked like a charm! I don't know how universal this is, but my C cable was blue.

[@diwu16]

Omg this is incredible. I went and checked and saw the extra blue cable unused and wrapped around the bundle. So I wonder if there's any chance that the C wire was already setup in the HVAC system? Sounds like a headache having to climb up there and I don't have a ladder. Btw so thoughtful of you to post this!!

[@ericschmidt7351]

@@diwu16 It's possible the C wire is connected at the HVAC, but I really don't know. This is my only foray into AC! I can't see any harm in trying and seeing what happens. At the very least, if you do have to go up there, you'll learn a bit more about HVAC. Good luck with the project. Glad I was able to help!

[@diwu16]

@@ericschmidt7351 I did it!!! After borrowing a ladder and wire stripper. Thank you again, I'd have totally missed the existing C wire if it weren't for you!

[@ericschmidt7351]

@@diwu16 Haha woo! woo! Very handy of you!

[@JnnODnnll]

So thankful I checked the comments! And thank you so much for posting this comment! I pulled the bundle of wires out of the wall behind my thermostat…and guess what? A BLUE C WIRE! Yay!!

[@henrymaduka7626]

Bought the Ecobee and was praying that am not one of those that would be needing to do extra work because of no C wire in my thermostat. And of course I ended up needing one. Went to my HVAC the wiring were not straight forward colors. And I said Nope! Not risking damaging anything. Reluctantly scheduled for a tech to come in and take care of the installation. Woke up the next morning, went on KZbin and as God wanted it, I stumbled upon your unique video. You wiring in the HVAC and thermostat were similar to mine. I follow every single instructions as displayed and it worked flawlessly. Thank you very much boss. Highly appreciated 🙏 🙌

[@tinamb08]

SAME! This video is much appreciated!

[@ReddestOfNecks]

You sir, are a savior. I'm a millennial in the sense that I don't know how to do ANYTHING in a house but NOT a millennial in the sense that I don't want to just give up and have someone else do everything for me. I wanted to tackle this myself and with this very detailed video I was able to do it!

[@torrecrenshaw4329]

Literally saved us! We tried calling support and they said they had too many people on hold so they hung up on us, found this video and it helped fix our problem! I don’t normally comment on videos. But so grateful for this one!!

[@Livefreewhileucan]

32 year electrician here. And I loved your presentation. Well done

[@2root2]

I hired an AC company to come down and install the ecobee devices and they couldn't do it. They didn't bother looking into the adapter or cabling back to the ecobee plate and was planning on returning the units until I saw this video. Wonderful job explaining and showing us what to do...I have them installed and working . Thank you

[@Marp3one2]

I just installed it and I owe you a huge thank you! A Company told me it wouldn’t be possible since I had no c wire and they wanted to charge me $$$ (a lot)to make it work. You made it possible! Thank you again!

[@thezeek2745]

Ecobee made it possible

[@juelzd7172]

As a HVAC tech ecobee are my favorite thermostats to install. That PEK made my work so much easier and saves the customer a lot of money

[@Tellymontcg]

I am Bob the builder around the house and I was nervous to do this until I watched your video!! Thankyou so much!!! 👏

[@4clover279]

I SERIOUSLY LOVE YOU 😂…. I had so much trouble with the manual guide because they did not say ANYTHING about switching the 2 wires to the thermostat. THANK YOU THANK YOU SO MUCH!!! Now I can cool down because it’s 90 degrees in my house.

[@assshakerstudios549]

Phew!!! This did the trick! Was exactly what I needed to work this out...well after ripping apart my furnace to find the HVAC plug!!! No idea why an HVAC plug would be on the furnace and not the air conditioner, but I'm just a musician so... Great video and thanks. The wires going in the different plugs really fuchedmeup! So glad you put that in here, as I could not find it in the 200 page instruction manual!

[@twoandhalfbengals]

THank you.. I had two HVAC people come over. They said it's a electrician job.. such lazy people these days.

[@jdenley6794]

You’re my hero lol I’m not very handy, but with your help I got my ecobee installed within an hour. Thank you so much for making this video!

[@Zandra2415]

Just watched your step by step and now I see why we couldn't install the first ecobee a year ago .Guess I can purchase another and watch again to install correctly. My thermostat is not equipped with the c terminal. I have the same as you were uninstalling. I am so happy to have found you and I live in the Chicago area as well. Thanks so much for this tutorial.

[@dbwinn]

Thank you! This helped tremendously. I did mess up and turned on the HVAC before hooking up the Ecobee unit, which in turn blew the fuse on the HVAC. I had to make a trip to Home Depot to get another one. So don't flip the switch back until everything is hooked up correctly!

[@OneHourSmartHome]

Thanks for watching and the helpful comment for others. Glad to help.

[@ViNguyen-sh3ym]

You are a good teacher as well as a good instructor. Your video is very educational and also easy to follow. Thank you for taking your time to come up with this video.

[@petabb]

I have a Carrier Edge thermostat connection with 2 wire but your video helped me to identify the control board so I disconnected that 2-wire smart board and connected straight with c-wire setup. Works great.

[@sankars74]

Very clear instructions and easy to follow. Followed the instructions from this video and was able to install the thermostat in 30 minutes. Really appreciate it.

[@Aurleis]

3:45 - Perfect explanation - especially for the PEK adapter. Thank you!

[@copperbrain7639]

Thank you! Best explanation I found. Very straight forward and clear.

[@OneHourSmartHome]

Thanks for watching and subscribing! I'm almost to 100K subscribers I appreciate everyone of you!

[@jam3sh3n13y]

Great video only one Problem. Those temperature settings would not work in Alabama

[@bborodkin]

this video made this install a breeze. Had no power once everything was completed and I just went back to double check my steps to make sure all wires were connected and that seems to be the problem. Once I double checked everything, everything was perfect. Thanks for the video

[@GymCrafter]

Thank You!!! My thermostat failed on xmas eve. It's -6 outside right now, so not a good thing!!! I got to Home Depot in time to buy a new one, but couldn't get it installed. Ecobee service literally said "due to high call volume and long wait times, we are unable to take calls at this time, click". Yikes! Luckily I found this video and the thermostat went in without issue. You really saved my butt, thanks so much!!!

[@timmcdermott9110]

Thank you for your excellent video. You explained everything perfectly especially the PEK wiring and making sure the blue wire went into the PEK slot and the Green wire went into the C slot on the thermostat. Ecobee instructions don’t tell you that. But again a big thanks you were a huge help as it’s -10 below and had to install new thermostat

[@PrakshGo]

Thank you so much. I installed successfully today. My thermostat didn't have a C Wire. Your instructions helped a lot!

[@dicegamenetwork]

Great video! Of course I forgot to take a picture of the wire setup on the previous thermostat when replacing it. This video helped me look for the circuit board to find the wire colors for the new thermostat. Thanks again!

[@carriedudley9747]

Thank you thank you thank you!! My husband and I were quite nervous about installing this but you made the process much more understanding!

[@nnoor9059]

A big thank you! I installed it successfully because of your clear instructions.

[@gabrielsmith3113]

Great video! No nonsense straight talk not to slow not to fast ecobee should add a link to this video on their packaging!

[@j.wright181]

You are the MAN!!! Much appreciated!

[@octorsep]

We were able to make it work with your help. Thank you

[@hilarymills2367]

Thanks for the video. I didn't even take the instructions out of the box, just installed with your video.

[@crazykidgaming]

I had a Trane system that did not even have a C connection at the inner condenser. It also did not have a W connection. After multiple attempts, I figured it out by looking at a wire diagram attached on the panel. There was a blue wire labeled 'B' and this ultimately connects to a 24v potential. So I connected the C wire on the PEK to this terminal. It didn't work at first. Then I noticed what looked like a mini circuit breaker or fuse box in the panel. I flipped all the switched to the ON position and then the Ecobee would work

[@randomcrap763]

If your thermostat wire has an unused wire on it (Usually wrapped around the wire) you can just connect it to C and use it as C and not install the extender box

[@ericschmidt7351]

Thank you! This saved me a lot of hassle!

[@mqproductions]

Yup I do home automation and that's exactly what you do. There's always an unused blue wire. That's your common wire.

[@Ben-lo7cy]

I like to live one the edge. I use orange for common

[@staytru5563]

Wrong. Mine was loose on the other side. Good logic though. I connected it to B. My A/c is 18 hearts old. The air compressor doesn’t have a C terminal to connect to on none of the circuit boards. B is essentially what C is joe though. It’s a trane motor

[@randomcrap763]

@@staytru5563 I meant you can use the unused wire AS a C but you would need to connect it at both ends

[@meiqueoonixzjaz03]

Excellent video! Thank you!! You saved me from paying someone to do it!!

[@elierbello3943]

Perfect explanation…Thank you Sr.

[@BrianAz]

THANK YOU! Clear, to the point, no nonsense, great video placement, clear speaking! Perfecto!

[@Whatuptee]

Excellent video. I had a C (blue) cable so this install was a breeze. Thank you for the easy to watch video!

[@husbeard]

Did you hook it into the existing C terminal where another wire was plugged in?

[@SamWinchester-td3yc]

I have an unconnected yellow cable and my Y is not connected the W is

[@ericmcdaniel4029]

Thank you. Very clear and concise explanation on your part. Helped me out determining on the pek use. Appreciate you more than you know. 👍🏻👍🏻

[@journeymylocs8702]

Thank you! Thank you!! I followed this step by step and was able to set mine up within 30 mins or so…the only thing is I thought I did it incorrectly but with my HVAC unit..it must be properly closed in order for the unit to work…once I did that…it worked with no issues!!

[@JnnODnnll]

So glad I looked at the comments again!! And thank you for mentioning this!! Went to install the power extender in my hvac, but then found C wire behind my thermostat…so I used that. But when I finished setting everything up, nothing happened… then I saw your comment and remembered…I FORGOT TO PUT THE HVAC PLATE BACK ON! So, thank you!

[@journeymylocs8702]

@@JnnODnnll Yes!!!!! You’re welcome 😊😊😊😩

[@josecaraballo418]

I'm in Chicago as well, great video and like comments below they want to charge me a lot of money stating I need new wires but it's almost exactly like the video the only difference is my yellow wire is connected on the thermostat but not connected to y on the furnace instead there's a blue wire connected to B/C. With the yellow wire wrapped around the bundle.

[@ms.m5730]

This video is well done and a very very helpful! Thank you!

[@bobeeshc2166]

Thank you, the install guide talked about the W wire being there on pages 10-13, but then suddenly didn't exist on Page 16. Thank you.

[@cbesc]

After watching this, anyone else feel confident One Hour Smart Home could walk you through disarming an explosive?

[@ericjackson2787]

You're a lifesaver and you just earned a subscriber!

[@dgalli79]

Your video gave me the confidence I needed to buy and install my own Ecobee. I also ran in to the no C wire issue so you were very helpful in my situation. Thank you.

[@gardenjohn1]

Best self-help video for this great thermostat!!

[@secomeco724]

Thanks brother your video help me a lot God bless you. I just wanted to mention some thing I just have a problem I have no C on my furnace call the customer service they told me hook it to the COM.

[@ginamarie479]

Would running the A/C with "Fan On" instead of AUTO be cheaper than doing AUTO with a portable A/C unit in an upstairs room at night?

[@whimsymaker]

Awesome Instruction. Straight to the point and very clear. Thank You!

[@btown1212]

Awesome explanation! I really like how you explain every single step to make it very easy to follow along.

[@andresbarragan8595]

FROM CHICAGO EXELENT INSTALL VERY CLEAR YOU REALY TOKED YOUR TIME TO MAKE IT UNDRESTEN

[@jorheybhai]

Excellent Vedio Job is done in 15 minutes Thanks for this wonderful Video

[@brandonuribe2549]

Thanks for your video! I used this to install mine. I followed your exact directions ✅. You da man!

[@emonterros0]

Great video. Made our install easy . Thank you very much for taking the time to make it.

[@playingwithevil118]

I know this is an old video but hopefully someone sees it and gives me a little insight. When I decided to upgrade to a smart thermostat I only had 4 wires, R W Y & G. My instruction guide said in my circumstance to connect the G wire to the C at the thermostat. Moving over to the HVAC unit I moved the G wire to the C terminal and used a jumper wire to connect the Y and G terminals. The only about this route is I'm giving up not being able to turn the fan on to circulate air without the heat or cool function being used. Is the PEK box doing basically the same thing or is there some kind of wizardry inside the box making it so you can use the blower motor independent of the heat and cool functions?

[@cardiackid48]

excellent video thanks very much for info

[@OneHourSmartHome]

Thanks for being a long term subscriber! I greatly appreciate it!

[@buco7748]

Hi Marc, yes I have unused wire it's blue color but in C port already green wire.

[@Blkg4u2]

Thanks for your video, I was able to install my new Thermostat after its arrival!👍

[@husker2493]

Great video! Perfect instructions for my setup.

[@Colin-uz4lm]

Great video!! much more help than the Ecobee app provides. cheers!

[@tylerbooth981]

I have a question so I think I have a dehumidifier downstairs, but I don’t really know how it works or anything. Would I click that I have an accessory installed?

[@stanbrown2005]

Thanks so much for your easy to follow instructions. God bless!

[@OneHourSmartHome]

You as well. Thank you for your comment and watching!

[@mohamedmarah3599]

Thank very much for steep by steep explanations. I am so excited to install mine tomorrow.

[@jigar121212]

Thank you for detailed description. It was so easy with your instructions.

[@ChristianBimmer]

It's a great installation video but for some reason my AC doesn't turn on now. But the fan is on. It is 82 degrees F now and trying to figure this out.

[@nguyentd92]

Will the heat mode work with that installation? I got one, but not sure because only cool mode activated

[@libertadcautiva4026]

In case the thermostat has 5 cables should I make any changes in the circuit panel or should I just disconnect the old thermostat and connect the new. In this case which would be the correct diagram?

[@mwwhatever]

I thought I had everything hooked up correctly. My system doesn't have a control board, just wires spliced together. When I turned the system back on, the ecobee started to boot up but the fan in the HVAC system just started turning on and off really quickly, like so fast that the fan didn't even get up to full speed. I noticed an unused blue wire along with the red, yellow, green, and white wires going to the thermostat. Maybe I'm supposed to try to use that as a C wire without the pek, but then where would I splice that unused blue wire in at the HVAC system?

[@en5510]

Thank you. You saved me $350 that i refused to pay.

[@creedgrey293]

very clear instruction, very well made video, GREAT VIDEO!

[@offspringrocks08]

EXCELLENT video, it was very informative. Helped me tremendously with the install. Cheers!

[@laquy82]

Thank you so much for your sharing this video

[@gabrielacalderon7170]

Whats the little screen for at the bottom left?

[@djskillzz215]

Good Day! And Thank you sooo much for this video... I was able to use your detailed footage and instructions to flawlessly install my Ecobee Premium thermostat in my home without the C wire... I appreciate you! #salute #Skillzlogic

[@OneHourSmartHome]

Awesome! Glad it worked for you! Thanks for watching and the comment! I appreciate the support!

[@user-uh8xg5vz2o]

I was wondering does this unit only work with central air systems

[@kck8933]

Thank you for this very helpful tutorial!

[@gkalisa1]

Can you still use the fan, independent of AC or heat running?

[@SamWinchester-td3yc]

Is there any video for 5 cable installation?

[@Mac_Raymond]

appreciate the vid 👍🏾 thanks!

[@outdoorsman2b918]

Thanks for this video. I'm a home owner, not an HVAC tech. How do I know have accessories and which type I attached to the HVAC system ?

[@jitendrapatil99]

Thank you sir, you made the installation easy and free 🙏.

[@KeyuNY]

Thank you, you made it very easy and simple to install this.

[@peterk9938]

Extremely well done!

[@victort6033]

Thanks man they have a lot you video

[@NegroRotary]

I don't have a furnace, I live in Texas, can I just install it without the C wire?

[@menswearhous]

I have a black C wire but when I take the batteries out of myt current T stat it stays dead. Does that mean my C wire is no good?

[@CesarHernandez-mz4mb]

I like the info. , very nice

[@dustinstallings4974]

What if on my circuit board doesn’t have a screw for the wires it’s a plug adapter

[@WordsPhotos]

based on another one of your great videos I used my Nest3 Thermostat and used the * slot with brown wire for controlling the DEhumidifier. Could you tell me where on Ecobee smart 5 does the Dehumidifier wire goes? I used six wires for Nest3

[@pizzalover1256]

Thank you soooo much I thought I did it wrong

[@kofiamankwa9258]

Ok, so you’re saying I should call someone to come install it. Got it

[@Dactylonian]

I have a c wire on my hvac board. But I don’t see the c wire at my thermostat. It is not tucked behind the wall. What should I do?

[@hitechparts4920]

Thanks!❤

[@user-lq5fd3pl6z]

Literally thank you for this. The two wires at the end were stumping me

[@Bangbangbigelow]

What if I only had my thermostat connected to W and R for heat only?

[@OneHourSmartHome]

You will need to use the common wire adapter or run a common wire. Do you have more wired in the wall?

[@DraLaRoc]

Thanks man! I think I can do this myself 😊

[@dallionaire8947]

Question, If my thermostat has a jumper between RH and RC, can I install this? Thanks :)

[@samh2705]

Your video helped me a lot. THANK YOU! 👍🏽

[@ld3rp]

My ac motherboard doesn't have a c connector on it. Can I still install the thermostat?