Nest Thermostat No C Wire Problem and Solutions

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Common problems with the Nest thermostat, what causes them, and how to fix it. The most common issue with a Nest thermostat not working right is causes by the lack of the C or common wire. In this video I go over 3 methods of fixing that problem.
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Опубликовано:

17 апр 2020

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Комментарии : 588

@hermantohioe3361 Год назад

Superb! 3rd method works well, thanks so much 👍👍👍👍👍👍👍👍👍👍👍🙏🙏🙏🙏🙏🙏🙏🙏

@samayala7636 Год назад

Question? My unit is wired ok but I call for cooling and the condenser gets a bit but never runs. I check for the 24v. We do have the 24

@andreathomas3366 Месяц назад

@@samayala7636pi😅

@andreathomas3366 Месяц назад

@@samayala7636k m m bbl Can😊

@judiek8995 2 года назад

OMG I DID IT!!!! I was *terrified*…. I have never done anything like this before. Electricity and wires scare me so much! This was one of those things I would have happily paid a professional a hundred bucks to do, but I decided to just see what it was going on “under the hood.”. So I shut down the power main (I wasn‘t taking any chances!) and opened up my old thermostat. Then I unscrewed it from the wall, and sure enough, I had no “C” wire. UGH. I found your video, and it’s so thorough, I went ahead and disconnected the wires, and did exactly as you said, putting the “G” wire into the “C” port. The terrifying part was opening up the furnace (in the dark, with my phone as a flashlight while also trying to replay that section of your video over and over. It was comical…). I found the control panel, and did exactly what you said… I kept having to calm myself by saying “you can do this… people do this *all the time.” I literally felt like I was diffusing a bomb! Like if I did it wrong, the house would blow up once I turned the power back on! I closed up the furnace, and turned the power back on, expecting the worst. I went back upstairs, and the Nest was all lit up and ready to program! We ran through testing the A/C - and to my shock, it came right on, blowing cold air. I DID IT! I am feeling really proud of myself for stepping *WAY* out of my comfort zone!!! People, if I can do it, literally *anyone* can!!! This video is essential if you find you don’t have a “C” wire!!

@reedscuba 2 года назад

I'll give that a year, maybe more before the stat head goes blank. I'm an HVAC tech as well. I don't use the word hate very often, but I hate the PEST. You want a good, reliable WIFI stat, go with an Ecobee.

@c.rutherford 4 месяца назад

I'm ok with the wiring if I could just find the C port and know its the right one. Not so excited about the notion of the house blowing up once I turn the power back on. Now if only I could step out of my comfort zone and go out and socialize more 😅

@c.rutherford 4 месяца назад

@@reedscuba I'm assuming thats a word play on Nest? Sorry not enough coffee this morning. I was talked into one of these with a rebate from my power company- even though the one they sent me looks like an Avon makeup case (its pink with a gold reflective top and "no Returns" of course). It looks like something that would be in Smurfette's house 😆. IDK I don't need to run my thermostat through my phone, my phone already has 10,000 trackers they don't need to watch my heating habits too lol. The only thing I like is the clear color display.... but that shuts off every time you walk away! So no seeing the temperature from across the room. Why do you hate them?

@Hvacmania Месяц назад

Congratulations 🎉 I love this comment

@lucidincomprehension 2 года назад

You’re a real lifesaver! The way you explain and your reasoning are straight forward and easy to understand. You just saved me from returning this thermostat. Thank you so much!

@ancestral Год назад

The last solution solved my issue with my Nest install! I echo the other comments in regards to the video being easy to understand and being so clear. The visual of the circuit board in the presenters hands really helped communicate what needed to be done regarding the rewiring. Thank you for saving me the headache of running another wire throught he wall and not needing to try the Google NEST power connector device for $25!

@tomcooper7189 Год назад

This was so helpful. My AC condenser kept shutting off when the house was not cold yet. Hooked up the C connection at both ends and we have constant cool air, got lucky extra wire was there. Your Capacitor troubleshooting and replacement saved us last week. Thanks for the excellent videos.

@patriciahillsman5333 2 года назад

Can not thank you enough for all you sweat in your attic and gained knowledge that you so kindly shared. We just had this happen and you fix worked like a champ. Yes we had water in the tube, shopvaced out the water and now we have AC again. Thank you thank you kind sir.

@ladonnataylor9172 2 года назад

Thank you and thank you. The 3rd option you mentioned in the video is what I used in fixing the problem and my system is up and running well without any issues. Thank you for saving me the money to call in a HVAC professional and the whole process of fixing the problem is not more than 10minute

@jimkelley8658 3 года назад

Nice video. I originally thought I had only four wires on my old Honeywell thermostat. I checked my HVAC/central air and saw another wire. Went to where the Nest thermostat was and pulled more wire out of the wall and there it was wrapped around the main wire. Problem solved. Hooked both up to the C and it works fine. I hope more people see this and it helps them also. Thanks again.

@marywisecup9496 3 года назад

Geez. So happy you are there showing the how to! Watching you will give me all the confidence to do it myself! Excellent presentation. 😏😁

@larryd4803 2 года назад

Glad I watched your video before making an HVAC service call. My a/c has been short cycling this season (after installing a Nest thermostat last winter). After watching a couple of your videos, I bypassed the thermostat to test the a/c without the thermostat and the a/c didn't short cycle. Found that my thermostat wire had a common (blue) wire hidden back in the wall and followed the steps on your video to add it to my Nest thermostat and to my furnace control board. Problem solved! The a/c is no longer short cycling! Thanks!!

@BenjaminSahlstrom 4 года назад

For the Nest thermostats that I have installed the "power stealing" feature has worked fine. Good to know about the potential issues associated with systems that don't have a common wire.

@WordofAdviceTV 4 года назад

They don't always have problems but I have seen many that did. Thanks for sharing your experience with them Ben!

@leeroymlg4692 3 года назад

I'm pretty sure the power stealing feature has short cycled my furnace and has caused it to not work

@mario312 3 года назад

@@leeroymlg4692 I'm having that problem right now after 2 years of it working fine. Going to try the C wire, but need to run one first.

@stephenpatterson8056 2 года назад

@Mario G I just for the first time in this house that we moved into 3 months ago tried to run the furnace this AM with the Nest I installed and it's making the furnace short cycle. No common wire but it worked fine with the old "dumb" thermostat. I guess Nest thermostats are just particularly sensitive to this? It's been able to run AC unit just fine.

@mauichaui641 2 года назад

Whenever I use the power stealing ive found that the thermostat act irregularly and can even cause the unit to short cycle after a few months. This is likely due to the flocculation of current through the fragile controls of the nest thermostat.

@melaniegroves567 7 месяцев назад

Thank you so much! My dad and I could not get the thermostat connected, Option 3 worked perfectly. You are a lifesaver!

@saifmahboob 3 года назад

I’ve moved from an ecobee to Nest, had 4 wires and a 4 to 5 wires adapter in the furnace. Whether I run Heat or Cool mode, both AC and Furnace used to run at the same time. I’ve removed the adapter and followed option 3. Now everything is running perfectly. Thank you so much for the video.

@hyperborean. 3 года назад

Thanks so much. I used your 3rd method with Honeywell Wi-Fi touchscreen thermostat. It also needs a "C" connection. It did the job.

@AshisKumerBiswas Год назад

Thank you very much for a quick and clear overview of the wires, purpose and how to add the common C. Luckily I had the fifth wire tied with the stem so that I did not have to move the G to C, nor run any additional wire. You saved me money and from a biting cold night. Happy holidays!

@theneiman 2 года назад

Great information, thanks for keeping it so simple that anyone can understand.

@rickperry411 Год назад

Thank you very much! I have a 3-wire system and hooked up a Nest a couple of weeks ago. Was getting a N260 error. Batteries died quickly, was losing connectivity to my WiFi. After watching the video I put the g to c and immediately fixed my issue. I did not have to make any changes to the Phone app. Once I plugged the furnace back in and reconnected the Nest I was back in business. Thank you!!

@abijahgribble 11 месяцев назад

Thank you so much for this video, easy to understand and straight to the point, just bought the gen 3 for my sister and was successfully able to wire it in because of this!!! So we both are grateful for such an awesome educational video! And she can now contol her ac away from home and couldnt be happier!!! Thanks broski! 🤙🤙🤙

@cklid1 Год назад

Awesome video!!! The 3rd method worked perfect for me. I have a 3-wire furnace (Heating only system) (R, W, G) and I simply re-purposed the Green wire to a C wire per the video and Viola! I then had to remove and re-add the Nest Thermostat within the Home app and then tell it I now had R, W, C wiring. Before this fix I had even installed Nests "C-wire Power module" inside my furnace which didn't work and ended up tossing it with this fix. Thanks a ton!!!

@markgoodson7720 2 года назад

Please keep making HVAC videos. I know everything else except this and welding and I understand it the way you teach it. Thank you for making these videos.🤘

@curtisramsey6388 Год назад

Holy Sh!t, that worked. And so, so easy to understand. Thank you for breaking it down to the lowest level. And here I thought HVAC repair was so complicated and required a technician. Excellent work my man.

@goddessworshipper 3 года назад

Thank you! I appreciate you making this video! My Trane furnace had blue wire disconnected, but it also had a Honeywell three zone device for three thermostats in home. I had to connect the blue wire to the B/C terminal in Trane xv80 furnace, AND also connect the blue wire to the C terminal in the Honeywell mini-zone box too.

@markousian 2 года назад

Thank you so much. You are the only one with good advice. 120%

@ivanys76 4 года назад

Thanks. My AC unit is Duncane made by Amana. When the unit was installed three years ago we got the NEST 2nd gen, a few hours later started making some bang loud noises. We replace the NEST for a regular Thermostat and the problem stoped. A moth ago the old Thermostat was bad and was time to get a new one, we got the NEST 3rd Gen, and again the bang loud noise came back. I went across your video, I did the option of green going into C wire with the jumper of the Y and G at the unit. So far I haven’t heard any more bang loud noise. One more time, thank you.

@pmhecht 3 года назад

Thank you! I was about to throw my Nest away, used method 3, and voila! It's working perfectly, thank you again

@Makaveli1258 3 месяца назад

You’re doing God’s work my friend. Thank you so much! 3rd method worked perfectly! 🙏

@WordofAdviceTV 3 месяца назад

Love to hear that! You're welcome!

@Cellvino 10 месяцев назад

This makes more sense to me than the other channels that I looked at.

@claudea79 2 года назад

Great video with excellent technical explanations! Thank you!

@ronp.1000 2 года назад

Thank you so much! You saved me a service call and heaps of frustration.

@mikepatrick1027 3 года назад

This is an AWESOME video. Thank you for this!

@ceajay7613 8 месяцев назад

Just had my first experience with the nest on a new furnace I just installed. The fan would run non-stop. Seems the power robbing caused the electronics to think there was a call for AC. Very frustrating - even taking the stat off the sub-base, still the fan stayed on. Threw me for a loop, until I removed the stat wires from the furnace and the fan stopped. ALLWAYS find a way to get a common wire to the stat - it will save you a nightmare later on. A note on moving the green wire over, then the fan switch on the stat will not function if one just wants to circulate air, but will let the AC and Heat work properly (Don't forget that jumper). Nice video - well done. 40 years in the trades seems like there is always a way they make things difficult on us.

@Coptic93 Год назад

Thank you so much! Found the c wire hidden in my wall and didn't need the adapter. I really appreciate your video!

@ScottyMac55 3 года назад

Thank you for the frustrating tidbit of info I lacked!

@Truebrusteve Год назад

My unused C wire was exactly as shown, wrapped around the cord. Thanks for the video, helped a ton!

@laurenceoliva4988 3 года назад

Definitely thought I could use the G fan wire into the common, so thanks for verifying my thoughts. Good info 👍

@Josh-fu3mf Год назад

I was doing research on the lack of a C wire on my Nest thermostat since I noticed the battery is always low and thank god I watched this video because I also had the C wire wrapped around the rest of the wires behind the thermostat and didn't realize it. I was getting ready to take apart my furnace and buy one of those adapters! Thanks man!

@jackdempster 2 года назад

Very helpful, video, thanks. Saved me a lot of aggravation & was able to find the Blue C wire to solve the problem.

@TheDjed19 2 года назад

OMG YOU ARE A GENIUS!!!!! I’m a hero to to my family now🙏🏾🙏🏾🙏🏾🙏🏾

@dougbas3980 2 года назад

That is just what I needed. Much Thanks!

@theneiman 2 года назад

V Great information, thanks for keeping it so simple that anyone can understand!!

@jimbohnenkamp5082 Год назад

The 3rd method worked for me. My brand new house (when it was built in 1994) had two lines of two wires each for a total of 4. I was going to just run a "C" wire and bind it to the other two lines, but I decided it wasn't worth the trouble if the 3rd method would work. Thanks for the very helpful video.

@alfjr9585 Год назад

Thank you for the explanation. After watching your exceptional instructional video I was able to run a C line from the thermostat to the source and now my system works perfectly. 🙏🙏🙏🙏🙏🙏

@dwrod24 2 года назад

Best explanation ever!! Good job sir

@elran123 3 года назад

I also repurpose the fan wire for my customers. Nice video!

@jdr03272 2 года назад

freaking brilliant video man! keep up the good work!

@JoaoSantos-vb7bv Год назад

Im a car guy i always use youtube for that but this time i used this video for troubleshooting my nest, it was perfect thanks for the help.

@Peripatetic_Proletariat 3 года назад

I changed G to C on both the control board and thermostat. I then jumped Y to G on the control board, removed batteries from by T-stat. I now have a common wire, thank you.

@luciahenao7167 4 месяца назад

Thanks a million your video and information are just GREAT. I did it by myself. I was having issue the nest thermostat didn’t have power and I just follow your instructions connecting the C cable that wasn’t connected to the Honeywell. 🎉🎉🎉😅

@tempovaggetti8911 3 года назад

this was really helpful, i probably safe me lots of money whith this video, thankyou very much.

@triflin86 2 года назад

Totally helped, thank you! G as the common, I don’t use the fan anyways. Time saver.

@johncarlson3476 5 месяцев назад

Thank you! My C wire was just disconnected at the board. Easy fix after too much frustration before I found your video. I really appreciate your help!

@WordofAdviceTV 5 месяцев назад

You're welcome! Good to hear that you found and fixed the problem!

@ivanbecerril2240 2 года назад

Jay, your videos are very informative and correct thank you for sharing. After many attempts to fix my hard starting problems I followed this video, connected the C wire and problem solved. This was the solution all along despite Google saying the C wire is not needed.

@tigerbalm666 2 года назад

Yeah, I thought C wrie was NOT NEEDED???? WTF? Annoying fukken ERROR after installing Nest! WTF? So why does it use 2 batteries???

@r.q.c5845 4 года назад

Nice ..!!pls more trouble shooting solutions or maintenance for wall air condition ..thank you for what you do , take care👍👍👍👍

@Eburgur 3 года назад

Great video. I just connected my C wire and problem solved!

@Eric1AL 2 года назад

Thank you so much. Worked like a charm.

@inlinesix6694 Год назад

My furnace does not have a C terminal but I had unused wires in the thermostat cable. It does have a terminal labeled “24V” and after some research I found I could add the C wire there. Everything is working great. Thanks for the video!

@eddierhee-pizano6391 2 года назад

Thanks for saving me money. Very helpful video from an HVAC PRO.

@jordanstickl2295 3 года назад

Excellent video!!

@Phathom0 3 года назад

Thanks, I found 6 cables for my wall, They just left common hanging on both ends. Wired it and hoping for the best!

@mannyislam1 7 месяцев назад

Your explanation made so much sense

@bbdstrom 3 года назад

Wow... we bought Nest a year ago and for past couple of months it sudden decided to drain battery over and over. We ended up manually charge the Nest over and over, when we charge it, few minutes later it said to put it back in the base... then to drain again next day??? Very annoying and then this video saved us some headache! We switched G wire to C and that's it! Thank you!

@travisgoodwin1004 3 года назад

Same here... all of a sudden the Nest battery would drain twice a day (while negative 15deg outside!). I used the common wire swap, and found a length of wire from an old landline phone wiring and set up a jumper. Thanks again this was a huge time and money saver!!

@benjaninja 3 года назад

Thanks for the video, I've been having problems with my Nest Thermostat E and this might be it.. will try it out tonight!

@benjaninja 3 года назад

It didn't work... Nest still won't turn on when attached to the wall. Edit: it worked!! I had to charge it with a micro usb cable for a while then the screen lit up and I attached it to the wall. Also, I had to close the furnace panel door (duh) for it to get power

@jayeshmissionviejocausa254 2 года назад

Excellent. Your explanation is succinct yet comprehensive to solve this problem. BIG THANK YOU.... I changed the wiring per your instructions to have power circuit using C wire. Not having separate fan control was not important to me. My Question if you can answer: On my furnace I found additional wires two wires connected. I believe they are connected to the Air Conditioning compressor. i did not change anythng there, just did exactly what you suggested including jumper from G to Y so AC when turned on will turn the fan on as well.. MY Q is did I do this fix correctly? I would appreciate your answer. Thank you in advance.

@realpro8817 3 года назад

Your videos make others think I know what i'm doing! Thanks for all the awesome and concise info!

@mikebijan4783 2 года назад

Bro I really have to say, this was one of the best and concise instructional videos I’ve ever watched. I felt the need to comment and applaud you for making such a high quality, easy to follow video 🤜

@WordofAdviceTV 2 года назад

Great to hear that you really liked the video! Thank you. I appreciate you taking the time to leave a comment, stay cool this summer bro! 🤛

@bigpapa8196 Год назад

This is the way RU-vid how to videos were before all the ads and everyone trying to drag videos out to 10 min.

@rodrigorubi6309 2 года назад

Very informative video, Thanks.

@olujidejeboda3421 2 года назад

very useful video! Good job buddy! detailed.

@cezarflores2848 4 года назад

Thank you so much for this video. My nest has been working fine but out of nowhere it will give a low power signal and it will stop working and out of nowhere it will start working. Luckily my c wire was wrapped around just like you showed on the video in my furnace.

@jonathanraul4086 4 года назад

Thanks again great video

@JICE-zd7vo 3 года назад

Hi J! Thank you soooo much for your video and insight on Nest thermostat. Your video was so helpful to help me fix my issue. My problem was my Air-conditioning was not being recognized by my Nest. From your video I realized that my Y wire not connected. I took your advice and cut a piece of extra wire from the furnace control board and made a junction wire to connect the Y to the G and now my AC works! Thanks again!

@tonycarey1808 Год назад

Outstanding video!

@tigerbalm666 2 года назад

I switched G to C on circuit and Nest and it works! Wifi eats up AAA batts fast so this solved my power issue, thx!

@jasonhan6514 7 месяцев назад

Thank you! It works for me very well!

@billinsacramento Год назад

THANK YOU!!! I thought I could use the extra black wire (method #2) and since my electrical knowledge can fit in a dixi cup (half full, not half empty) you saved the day for me. I would have just hooked up the extra black wire, thinking it was a common and called it a day.

@lazmotron Год назад

Great Video, Thanks!

@glennroid 3 года назад

Thanks for this. I initially changed my G wire to the C. Then I noticed that there was an unused Blue wire. I switched the G back to G, connected the Blue to G on both and voila, it worked. Thank you!

@javiergomez8070 3 года назад

I don't get it

@javiergomez8070 3 года назад

I out g on c and now I have blue G desconected

@glennroid 3 года назад

@@javiergomez8070 sorry, I mis-typed that I connected the Blue to G, I connected an unused Blue to C.

@glennroid 3 года назад

@@javiergomez8070 G on C will work.

@noahlopez4819 Год назад

This saved me so much headache! I actually had 2 extra unused wires!

@cddesch 3 года назад

You are my hero.

@BB-wh2vu 4 года назад

very helpful thank you. I luckily found a spare wire that I wasn't connected to the board and will use that as a C.

@NoDoubt9910 9 месяцев назад

Brother I need you to do this in my house. AC guy quoted me 350 to 400 to add this C wire. Says electrician will charge 500. You save me bunch of headaches. To me, the g wire n jumper seems viable. God bless you.

@JWH-01 2 года назад

It depends on the length of the cycles. The battery won't charge without a difference of potential across the coils of the control relays when they are not in use if you don't have the "C" (common) wire. That isn't enough if the thermostat is also energizing the relays in the furnace for long cycles. The adapter didn't work for me. The batteries in the thermostat still died after a few days. I ran a new 5 conductor wire from the furnace to the thermostat. It has been working ever since. I wish I had seen this video sooner. It would have saved me the trouble of running the new wire. Using the G wire for a C wire is a good idea. You only give up the blower on constant feature, which we rarely use anyway.

@ProStallions7 3 года назад

Hi I hope you can answer my question, I have an issue to my new nest thermostat it seem my fan is runs longer is not stopping I install correctly like yours and I find out when I look to my furnace I saw yellow wire and red wire going to AC is connected to Y/Y2 since there’s a connection Y1 in my PCB, do you think I need to transfer my yellow wire and red wire from AC to Y1 terminal? Thanks.

@k.matthewhare746 3 года назад

So do I hook my extra wire to the transformer at unit or the relay at unit to create a common?

@rhett_link Год назад

wow, very helpful!

@leeghany5163 3 года назад

Nice video..Thank you.

@daghostcity1658 3 года назад

Tha k you so much this helped out a lot

@ferjunlx Год назад

Nice try! I found a blue c wire behind the the thermostat so was wondering if I could find a blue as well connected to the furnace chipboard, but I didn’t see one like it. Then I stripped off the wire wrap that covers all other wires. When I cut the wrap down a bit and noticed there was a blue wire wrapped with other wires but underneath the wrap. I then connected it to the C terminal on the chipboard. This works. My nest thermostats now have the power from The blue C wire all the time!

@parkerthompson7733 2 года назад

Your advice was amazing. My thermostat had 2 wires W & R but I found an unused G wire attached to the furnace but not the thermostat. Watching both options 2 & 3 allowed me to make my best operational

@hopz12 2 года назад

Hi Parker, this is my setup as well. What did you end up doing to make this work?

@parkerthompson7733 2 года назад

@@hopz12 I unhooked the g wire because it clearly wasn’t being used without an actual connection. So I moved the g wire to my c slot on my furnace and the new thermostat

@parkerthompson7733 2 года назад

@@hopz12 let me know if that helps at all

@rubenponce8080 4 года назад

Very well explained. I have a low battery problem with no C wire connected. Will connect C wire and see if it solve low battery problem

@davidmckinney6577 4 года назад

Looking good buddy 👍 I like the cap.. you are a wealth of knowledge my friend. I'm glad to see you are doing well and I continue to pray 🙏 that you and your family are safe.. have a good one buddy 👍.. me and Arnold and bigfoot are watching you now.. it's cool here today and rain last night..we are in what is called snowball winter..all the snowball bushes are in bloom now...we have one more blackberry winter.

@WordofAdviceTV 4 года назад

Nice! It sounds like a beautiful scene is unraveling over there. Good to hear that you, Arnold, and Bigfoot are doing well too! I hope you enjoy it to the fullest. Thank you for watching the videos David! This last Sunday we had very bizarre weather here in Minnesota. It went something like this: Snowstorm then sunny and snow melting, then light snow again and cloudy, then sunny and clear, then heavy snow again! I've never seen it snow and be sunny at the same time. This was a first.

@davidmckinney6577 4 года назад

@@WordofAdviceTV we have that kind of weather here Jay, there is a old saying in Kentucky it goes if you don't like the weather just wait around and it will change. I was out building a porch on my outbuilding last week and it was sunny and all good you know so I took a minute break to come in and get something to drink and I wasn't in the house nomore than maybe three minutes and I heard like rocks hitting the window seal and I went to the front porch and it was hailing the size of marbles..it lasted for a few minutes and it went from being warm and sunny to cold in a blink of an eye.. that halted my work for the day.lol. But I was right back to it the next day

@WordofAdviceTV 4 года назад

David McKinney Oh well that's interesting! Turns out that is a normal occurrence in some places 😀 I'll have to remember the Kentucky saying, thank you for sharing the weather changing experience! 😄

@user-mz7si1op6u 4 года назад

thank you 👌

@creole75 3 года назад

So do you leave the yellow connected along WITH the jumper that's in Y?

@alpineestatesalesliquidati684 11 месяцев назад

Thank you I was able to fix my ac, thank you so much

@zlo92x21 4 года назад

Done this before but not with the jumper and wud lose control of using the fan only does adding the jumper allow u to use only the fan on the tstat?

@CammieKN 3 года назад

Thank you!

@burnnotice206 3 года назад

I found my Nest did not have a C wire attached yet there was one present in the thermostat wire. I stripped and connected the blue wire, went to the furnace found the C wire wiring block location and hooked up the wire. Problem Solved! Thanks!

@mkabir22 7 месяцев назад

The second method works! I will return my google adapter which I ordered.

@CarrollCanada 2 года назад

Well well well. The black wire was my ac wire and that fixed my issue. Now I know how to read my motherboard. Thanks

@jaythompson222 3 года назад

@4:45 NOT REQUIRED, COULD BE HAZARDOUS... here is why... Fan is unaffected with a gas furnace (dual fuel system). The fan speed (usually max) for cooling (Y) is predetermined, and comes on upon energizing the Y terminal. The fan speed for heating (W) is also predetermined (sometimes med/low or med/high) and is set based on your required temp rise. The predetermined fan speed for heating will engage the fan aprox 1 minute after the burners warm the heat exchanger on your gas furnace/air handler. Y fan speed is set based on temp split and the air conditioner's air flow requirement. W fan speed is set based upon temp rise and the furnaces heat exchanger's air flow requirement.... shorter answer, heating will not be affected... and for this reason I find the authors advise of adding the jumper from Y to G unnecessary. Most furnaces will override the G call created by the jumper and run the blower at the required (usually max) speed for AC anyways. A call for fan (G) is often a different speed than a call for AC (Y). Additionally if the furnace had a fan switch mounted on the side of it in the mechanical room or hallway as i often see placing the jumper between G and Y would cause nonstop continual air conditioning if the fan switch were to be engaged. this would likely freeze up the system, cause extreme energy usage and could even damage the equipment if left unnoticed. Don't insert a jumper from Y to G, totally not necessary! All other info in the video was informative and accurate though. Thanks for your videos and efforts, truthfully you are appreciated, I'm just trying to help.