Hey Dave, My Wife said: "The expensive service call is well worth it! You're retired, it's late, just call a service tech and have them do the project for us." I calmly replied: "You are right. But since you think that it's reasonable to spend the cash that would cost, I will just do it myself and throw that $250.00 or so into my "Mad Money/Project Fund". My humble opinions and offered thoughts: We are here in North Texas, where the HVAC comes in handy on occasion. Our weather is not as extreme as some other areas, but a properly functioning HVAC system and easily operated thermostat does REALLY help reduce that grinding, rattling clatter that blasts some guys from across the dining table day and night. As a retired Electronics Engineer, I want to thank you for this reference guide video. It serves the intended lookup much better than others I checked. I encourage you to assess what makes your approach different and stick with it. As for content, this video did not apply to my scenario. but provided me related context data that allowed me to determine the best solution for me to do a custom conversion. That's what I admire about the video... enough clear data allows handy, trained, or Pros to be reminded of context and even catch reminders about lazy/crazy installers tucking useful wires into hidden areas. An insight to share... One of the first things I was told about building prototypes in a design lab: "Don't use color coding for wiring." Naturally, I thought that sounds crazy, so you know that I asked "Why NOT?!" The answer surprised me, but knowing it has saved me a ton of time, aggravation and money. Some people discovered that the best way to make wiring as secret as most encrypted software, is to simply use a completely baffling color system. The toughest ones only change color for instance, at voltage differences, power v/s control usage or some other purpose that is known ONLY to the Designers, Makers, Engineers and Field Techs. WHY? It's obvious, when you think on it... It makes even a handy Engineer stop and usually, they call for Authorized, expensive service techs. It's true that it can help stop self-inflicted injuries, system damage, etc., but mostly it's used to prevent DIY wrenching. So before working on equipment that I don't already know, I almost always gather diagrams, codes, colors, ratings and other pertinent info. Sometimes I look it over and see that I can fihure all of it out just from training. experience and logic, but don't be too proud to look things up. Especially because you often find a KZitem video of someone who can save you time, money and maybe a couple of fingers or toes... Then: (1.) Check with a Voltmeter to make sure power is not miswired or crosswired by damage, to the metal control boxes, motor housings and other stuff you intend to touch. etc., creating a shock hazard. Remember, often times, if it wasn't messed up, you wouldn't be in the attic at lunch in July, or whatevet. You don't want to find your first case of deadly shorted wiring with your bare hands... it may be your last. (2.) Turn off the related breakers, TAG or list the breakers you need off and attach tags or noted list to the opened breaker box. Then go back to the work area and VERIFY with that voltmeter that power actually is cut off by the breakers you just switched. (3.) Starting at the functional equipment or main control board involved, TAKE A STARTING PHOTO. Check what your connection or wiring block labels are and map out the "Legend" of the wire colors actually used. Write down any other information you can see that matters. Seevif it matches the info you found, or if you need to search again! 4. As you look for damages, burned wires and fuses, also look for extra wires in the Harness, Bundle or Tangle Wad you are dealing with. Sure, there can be wiring patches, junctions between here and a thermostat or other remotely located panel, but usually you'll spot that when you get to that panel and see that the wires don't match when you're mapping out that end... see, I solve many mysteries just by early mapping. People often make mistakes with these things when originally installing, or whiletrying to fix it before they call me... and THEN call me as a Pro, friend or Brother In Law. BTW, they seldom confess or advise on any of it! (5.) Since you have gathered diagrams, known color codes, legends that decode related markings and abbreviations etc., you are now prepared to troubleshoot, modify, customize an integration or invent the next module. Safely, quickly, profitably. NOBODY PROFITS MORE personally, than a DIY person who gets it done right and successfully, WITHOUT paying an expensive tech that isn't required, since they are Do It RIGHT Yourself people. Enjoy learning and making things better! Dean
@michaellighter
5 жыл бұрын
I think I echo others in saying that I have watched at least a half a dozen videos and was still confused until I watched your video. Thanks so much for taking the time to fully explain the steps and giving an understanding of what everything is and why. Many Thanks!!
@Timmmer
7 жыл бұрын
Watched 30 other videos..including Honeywell's. Yours is the only one that was simple and accurate.
@PoeLemic
5 жыл бұрын
Yeah, Tim, NO FREAKING KIDDING. This guy is genius level. The Einstein of A/C instruction. Big kudos to JustAz.
@abeecruz
5 жыл бұрын
Yes! This video is the only one that informs you about the h vac!!
@ballpython3310
4 жыл бұрын
I watched honeywell's ... they tell you to turn the power back on at the end but never tell you to turn the power off in the beginning lol.
@fuelerr
4 жыл бұрын
I agree. My furnace guy said I had no C wire but hey presto there it was just waiting to be hooked up. Now I have 24v power to my thermostat.
@shet0011
4 жыл бұрын
Still relevant and valuable. Thanks so much!
@luvdocumentary
5 жыл бұрын
Wow.. I've watched 5 videos and yours was the only one with the tip about checking for unused wires tucked into the wall. This saved me not only money but from the hassle of having someone come over. Thanks!
@GeorgeBarbery-r3y
3 ай бұрын
This video is thorough and it gives people the exact steps necessary to install a 5-wire system into a 4-wire system. Excellent!
@Johntheheadache
2 жыл бұрын
Dear friend, your genius is not just your knowledge, it's your uncanny ability to teach concepts in such a simple way. Thank you!
@markvermilyea7413
4 жыл бұрын
I watched several videos and yours was the only one that explained to check that the C wire was connected at the furnace. My wire bundle only had 4 wires and I was getting super frustrated. Then I watched you explain it all. I simply had to run a single wire from the C terminal at the furnace to the thermostat, and it worked!! Thank you so much!!
@ahyungrocks5509
3 жыл бұрын
Thank you for taking the time to use white board for explanation. This is the only video I found with clear and simple instruction.
@sighznoname
2 жыл бұрын
You are my hero!!! I’ve been so frustrated and returned the smart thermostat I had purchased. Just could not find a walk through or what I was missing. Your walk through is clear, concise, & educational! Thank you!!!
@ivosan11
3 жыл бұрын
Of all the videos about upgrading to smart thermostat, this is the most useful
@JohnAnderson-sz5yj
5 ай бұрын
This video was spot on and to the point. After an extensive internet search and watching several other videos, yours is the only one that explained the problem and provided a solution. THANK YOU! You earned a new subscriber!
@nohardfelnz
2 жыл бұрын
As mentioned 100 times, you are a life saver....hard to imagine this was 5 years ago...you are a very good teacher! Thank You!
@colemant6845
4 жыл бұрын
Wish all KZitem videos were like this one. Clear, Concise, Short and answered the most common C wire/No C wire questions the novice might have. Well Done! Thanks
@worldofjohnboy
6 жыл бұрын
Thank you for this, especially the whiteboard diagram... I had a four wire to my thermostat, purchased a five wire and taped it to the existing, fished it down and attached the wires as you showed to the furnace. Now my nest thermostat no longer trips the AC breaker with the common wire hooked up!
@william.2102
11 ай бұрын
Had a 4 wire thermostat that worked fine but wanted to relocate a new smart thermostat to a more logical location. The original stat was right in the middle of a main wall in the living room and I wanted to use that wall for a TV or some artwork. Relocated a new stat in the hall about 7 feet away from the original. Had to get in the crawlspace to run a new 5 wire cable. Came up thru the floor in a hall closet and routed the cable behind the closet door frame trim. Long story short. Took me several days of planning and an entire day to run the wire. Your vid will help me wire the new unit correctly. Thanks.
@beverlylewis2112
Жыл бұрын
You the man Bob. Been looking for an answer for the four wire issue for my new thermostat and only had 4 wires. thank you Bob
@donkenorn
5 жыл бұрын
Ditto with prev comment. In my opinion, Dave, you are a gifted natural teacher! As I watched, I would think, but "what if", and VOILA, you would provide an answer in your next sentence. Well done! Thanks.
@normandanielpage4495
5 жыл бұрын
Hi Sir. I just want to ask something regarding your video. Since you connected a jumper wire to G and Y (compressor) terminals... does that mean when you turn your thermostat to "HEAT MODE" the fan will not work since the jumper is only for the fan and the compressor (cool mode)? Thank you.
@lcauvin9
6 жыл бұрын
This video is head and shoulders above most videos. Bob is a really great teacher.
@ITSmike6736
4 жыл бұрын
Simple, straightforward explanation. Thanks! Saved me $280 for installing 2 thermostats.
@tidehoof
7 жыл бұрын
This is one of the most informative youtube videos I have ever watched. I have a nest thermostat and it has been struggling with power stealing issues all summer due to a lack of a common wire. Thank you.
@ToddTaylorTX
4 жыл бұрын
Just want to say thanks! Bought a Nest and their compatibility checker showed compatibility with a Honeywell 4 wire but when I wired it up it gave me an e73 error (no power). Your video gave me confidence to bypass the nonsensical Honeywell wiring box (wires labeled as 1, 2, 3, 4... thanks Honeywell) and wire directly to the AC unit + the Common Blue Wire... it now works like a champ. It gives me great joy not having to call and HVAC Tech out. Happy Holidays!
@DPHINSFAN34
5 жыл бұрын
I did your no green wire trick and got it up and running tonight. Thanks for the backdoor/cheap idea
@NewShockerGuy
4 жыл бұрын
THANK YOU for explaining this. No one could explain the 5 wire and how easy it was to check/correct. I had no clue what the colors were or did and your video was great! This is what KZitem is about!
@vicsanchez4945
3 жыл бұрын
Fantastic Video. I had 5 wires but only four were being used on my old Thermostat. The c wire was not connected on the furnace side. Connected it and the Honeywell thermostat is working amazing. Thank you so much.
@rjrosel
3 жыл бұрын
This was they most informative video on converting 4 wire to 5 wire. Thank you sir
@howardpecker9536
6 ай бұрын
Thanks for G to Y tip and explaining why it's OK to do that. Solves a lot of issues.
@moonpiespotlight4759
5 жыл бұрын
Extremely well explained. I cannot vouch for the accuracy but you seem confident enough that I don't feel any doubt about it.
@st.timmys9525
Жыл бұрын
Thanks for the video. Planning on installing a new smart, wifi thermostat and I may not have an additional wire for the common. Your information about using a jumper at the unit may be just what I need.
@reffan2204
3 ай бұрын
The best. Many others show doing things, but don't explain the whys and hows.
@briankurtyka308
6 жыл бұрын
This is one of the best videos I have ever watched to learn how to do something. Very clear, simple and understandable. I NEVER have commented on a video before but this one is GREAT! Bob you should be a teacher or an instructor. Probably spent a good amount of time making a script and editing but it turned out great. Thank you. Brian K
@johnson554671
2 жыл бұрын
I really appreciate all the effort you made into putting this video. Upgrading from a 4 wire honeywell thermostat to an Amazon 5 wire smart thermostat. Very helpful!
@sarahsalazar3915
6 жыл бұрын
This video saved my life, I was so lost trying to figure out what to do since the blue wire in our unit was cut several times. Your green to yellow wire trick worked perfectly.
@efstathios1
7 жыл бұрын
THANK YOU this has to be the BEST explanation of how to do this conversion!!!!!!! Very clear and very succinct. Again THANK YOU
@j.ohanian3808
4 жыл бұрын
Question - I have an oil boiler with hydronic baseboard heat 30 years old heat only and NO C Wire, however the thermostat that I have an Emerson Sensi Model ST75 requires a C wire, can you advise how to set that up for my system?
@danayost9326
5 жыл бұрын
You rock. I had this exact circumstance, you were a life saver for a not so handy homeowner. Worked perfectly. Thanks
@godsholytemplechurch5350
4 жыл бұрын
Most simple and efficient explanation i have ever seen on this topic. Thank you!!!
@franciscocarreon465
6 жыл бұрын
I want to express my congratulations on a job well done and your explanation was very clear and proper dialogue.
@cosmogirolamo5920
2 жыл бұрын
Fantastic video. Love the hack to make a 4-wire system run a 5-wire system. Thank you.
@beehive141
3 жыл бұрын
Outstanding explanation I never seen anyone break it down the way u did .. your the bestest !!!
@petergretes6109
5 жыл бұрын
Bob your instructions are very good and easy to understand. There are only 4 wires coming out at the thermostat. You mention to put a jumper wire at the G and the Y terminals at the hvac ang the fan will run when the compressor runs. Where does the fan get power to run when the heat is on?
@nclefty5775
7 ай бұрын
I believe the answer is that the furnace controls the fan in heat mode.
@rowdyboostejk1873
5 жыл бұрын
How could anyone thumbs down this video?!?!?!? Explained very well, and in a pinch or like Bob said got to go an incredible distance and don't want to do drywall work too (also,some of us don't have an outlet within 20 feet of our thermostat for power plug). Excellent video!
@jayjaykingbee5566
6 жыл бұрын
job well done!!! Technically the compressor doesn't use the 24 volt "C" but the 24 volt coil on the contactor which controls the line power used to start/stop the compressor does, and same for the blower motor, the 24v is feeding a "fan relay" which in turn controls the line voltage to blower.
@thihal123
7 жыл бұрын
We were really really lucky in our new home. The HVAC came with a very old thermostat and the C wire was not connected to the thermo but was connected to the C terminal at the HVAC end. The builder also has installed a junction box so we didn't have to drill any holes but we did have to install a mount adapter.
@burrbentine
3 жыл бұрын
This is gonna save me hours of work pulling new wire
@robsteinberger1749
6 жыл бұрын
You are the man - love the option of relocating the G wire if necessary, didn't see that anywhere else. I'm going to do it!
@VasylGladun
2 жыл бұрын
Probably the best video on the subject. Thank you.
@SWLinPHX
3 жыл бұрын
I echo the others in appreciating your straightforward approach and whiteboard explanation of each wire's purpose. However I have ONE IMPORTANT QUESTION: In Honeywell's G-Wire substitute video, they say it only works for propane/oil/gas furnaces. I have a heat pump HVAC that is electrical only (no gas at all in the residence). I need to know definitively: Will the G-WIre substitute work in my situation or not???
@bjb6028
5 жыл бұрын
Thank you for this informative video. It is simple and straightforward. I have all the components needed to install the thermostat, but I was too afraid to screw things up. After watching this video, I feel like I'm ready to do this. Thanks!!!
@EpiphyteX
6 жыл бұрын
Thanks for the video, this porcess was far simpler than I had expected and you definitely saved me from calling an HVAC tech unnecessarily
@glyakk
2 жыл бұрын
Hands down best video explaing everything very clearly!
@angelalburquerque7457
6 жыл бұрын
Great video. Don’t forget to cover the big hole in the wall to avoid wrong thermostat reading due to draft.
@steven.h0629
5 жыл бұрын
Great Video.. thanks ! I personally love the fine detail describing each wire, what they should do, and where to find each end :-)
@chadisbell4187
2 жыл бұрын
This is a great video. Thank you for explaining what all the wires mean. I feel this should be very easy to accomplish.
@fernandorosillo9715
4 жыл бұрын
Beautifull job and explanation. You did simple and great. I love your way. Thanks for your time and your help.
@shayf8369
5 жыл бұрын
Great video! Exactly what we needed. The Honeywell site was useless. Thank you!
@abeecruz
5 жыл бұрын
Extremely useless!
@marias5248
7 жыл бұрын
Love the visuals, makes it easier to understand. Very simple instructions and JUST what I needed. I wasn't going to make this purchase until I saw your video. MANY THANKS!
@shockracer
6 жыл бұрын
Thanks to your simple, clear, and straightforward discription of the extra unused wires and if applicable, you can use one for the C-wire. Thanks for your video! I ended up installing an EcoBee4 and it now works perfectly!
@richellebrittain2127
5 жыл бұрын
If you had looked at the bottom of your ecobee box (it's in all of them AFAIK) when you installed it, you woulda seen their "Power Extender Kit" which effectively substitutes the G-wire for the C-wire *without* losing fan control as in this video's solution. Similar devices exist for other thermostats.
@darbracer
7 жыл бұрын
Thanks Bob! Would never have thought of extra wires tucked in the wall but there sure was! Thanks again, great video
@Cmarch75
6 жыл бұрын
I. Have honey well 8000. I connect the red wire to the r and rc but no. Power
@jakearmitage8377
7 жыл бұрын
Thanks for the nice tutorial! I changed my oil/heat pump system to electric heating but kept the heat pump for AC. The problem is I can't find a way to make AC to start. My old thermostat had only 3 wires and 1 for the light indicator when it's switching to oil. Any idea what I did wrong? Thanks
@patricksmith5312
3 жыл бұрын
Hey, just wanted to say, Huge Thanks for this video. Being able to install a 5 wire wifi system with only 4 wires, at the cost of not using the fan feature which I have never used. Is completely worth it. Just finished my install and system and wifi are working great. Thanks again.
@peterv1806
5 жыл бұрын
Outstanding explanation - thank you so much!
@geodj67
5 жыл бұрын
Wow! thank you so much for the straightforward and easy to understand video on how to solve the issue of no c-wire for the uber-novice!
@TARANS012
9 ай бұрын
Best video ever especially if you are instalking Amazon thermostat which has 0 instructions
@yancyana7750
4 жыл бұрын
The visual was very helpful. Thank you for sharing this video.
@eeyorehikes2805
4 жыл бұрын
Holy crap man. You're really good at explaining stuff! Lol. I'm not even changing my thermostat, just randomly stumbled upon your video. Watched the whole thing 😆🤙
@hardyb311
4 жыл бұрын
I'm buying this unit today and following his steps pretty plain and simple instructions.
@JimmyHFinancial
5 жыл бұрын
Great video sir... this is by far the best vidro explaining the 4 wires to 5 wires issue.. thanks for sharing
@johnpolos8796
4 жыл бұрын
As an hvac student I appreciate this info, well explained!
@joeoconor3408
6 жыл бұрын
This guy is awesome! Very good explanation. All we need to understand how AC works .
@ramsys9906
7 жыл бұрын
The most descriptive up to the point, now i can confidently buy Honeywell T5. Thanks buddy.
@TXManka
4 жыл бұрын
Great video. One question...if you have to jump Y to G, what about the W terminal? In the wintertime when you switch from AC to heating, what causes the fan to run when the heating cycle is active?
@nclefty5775
7 ай бұрын
I believe that the furnace controls the fan when in heat mode (based on the sensed temperature).
@Doctrtony
3 жыл бұрын
Thanks!! Great info, can also send a jumper from the nearest outlet using a 24v ac transformer!
@BirdsRule123
5 жыл бұрын
Thank you! Had no extra wires stuck in the wall, but your instructions walked me through!!
@KTJohnson_901
3 жыл бұрын
Best instructional for five wire systems. 👌
@abeecruz
5 жыл бұрын
This video tells u to check your HVac!! This is soooo helpful!! No other video told me to check that. Thanks A lot.
@sambatarseh242
4 жыл бұрын
you can use the old 4-wire bundle to pull a new 5 wire bundle with the right colors.. make sure well taped and not mangled where they may not pass thru old wire passages.
@Engineerboy100
4 жыл бұрын
Fantastic video! I think you solved my problem for me, haven't tried it yet but I think the blue wire in the attic is not connected. If that is my problem, and you have solved it, you are the MAN!!! :o
@mikelee73
5 жыл бұрын
Best video exlaining the c wire for wifi thermostats
@Dave-jc6ky
4 жыл бұрын
Hi, We have an OLD gas furnace and central air. We think our thermostat is bad and needs replaced. We have been considering the Honeywell 9000 wifi thermostat. We believe our current digital thermostat is bad and needs replaced ASAP. We will be also upgrading our current heating and cooling system as soon as possible. We only have 4 wires on our thermostat and there is a jumper from the RC to RH terminal. I am uncertain if there is a common connection for the thermostat on our old furnace. If there isn't I assume we cant use the new wifi thermostat. Your input on this is appreciated!
@vueport99
3 жыл бұрын
Crystal clear instruction.. Triple thumbs up!
@stevewaclo167
3 жыл бұрын
Excellent video! Curious, do modern, solid state thermostats (no mercury) really need to be as level as possible?
@Toeknee462
2 жыл бұрын
Incredible video. Thank you. Saved me a $150 service call
@drancealot
3 жыл бұрын
That was great. Not sure if I have a C wire but I'm thinking I don't. This will save me a lot of work! Thanks!
@emana6474
4 жыл бұрын
You are good. You made complicated thing so easy to do. You are awesome. Thank You.
@dannyharpermusic
Жыл бұрын
The best video for this!! Very well explained. Thank you
@gupttura2766
5 жыл бұрын
Great video..I am running into same problem..no 'C' wire n my existing thermostat. But when I checked the HVAC unit, it does have Red wire plugged in to 'C'!!!
@Royal2Motion
5 жыл бұрын
Very nicely done, even though my project will be a little more taxing as I only have R and W and need C. this instruction was very encouraging and well organized, thanks for you time and for share this knowledge sir!
@eliocelestino1808
4 жыл бұрын
Agreed watched several videos just to get more confused. Thank you so much I just have one question before I start programing it. I have a Honeywell T6 Pro and my issue was to bridge R and RC wires which I did sliding the built in switch which i did. But I did not see you doing on yours. Is that because your particular model wont need or i will have a problem later? Thank you in advance best video, concise and informative
@jsrivera55
4 жыл бұрын
I did exactly as he said, only problem is that my heater is turning on at the same time as the AC turns on. Did wire incorrectly?
@AndyNav1
4 жыл бұрын
Great video. Is it possible to the reverse. That is connecting a battery operated thermostat in place of a hardwired 24v thermostat? Thanks
@ericmorales6262
5 жыл бұрын
Excellent video, very thorough and easy to follow. I learned a lot in less than 10 minutes. Thanks
@jsubs
3 жыл бұрын
You made it easy and simple to install! Great Video!!
@bugpower18t
3 жыл бұрын
Great video, I've watched 10-15 and this explained it the best. I do have a question though. What do you do if you don't have a compressor? I don't have AC but have gas heat. Would I hook the C wire up then jumper the fan to the Heat terminal?
@joshuafreeman6720
5 жыл бұрын
Well done!! The blooper at the end made it worth the watch. Thank you
@starrynightk
4 жыл бұрын
Thank you. Very easy to understand the way you explain it.
@NHseacoast
5 жыл бұрын
Nice explanation ! most don’t talk about the C wire which I don’t have and as a result I don’t mind using use the automatic fan function only.
@wolfgreen162
2 жыл бұрын
Thank you very much for a simple explanation. No bull shit, just right to the point.
@jerseystrong7284
5 жыл бұрын
Bob thank you for breaking down your video instructions into simplest terms. You pay attention to detail. Thank You , keep up the good work
@portugueseeagles
4 жыл бұрын
Great video my friend. I leaned a lot from you in this video, many others show only the green wire being switched, but have not seen anyone solving the problem of the FAN with a jump wire. I am trying to connect my nest thermostat and having the issues you describe. Do you have any video for t dual power system ? because my AC is in the attic, and by heat is baseboard hot water, my old thermostat controls the 2, but now have trouble in getting it to work. ( Should I connect the RC and RH wires ? ) would it create a circuit breaker to go off ? seems like a lot of people can use help like you. I wish you were her in Connecticut, you could be of help. Once again Thank you
@treefrogjoness
3 жыл бұрын
I noticed that the hole in the wall behind the thermostat is not sealed. If the hole isn't sealed with tape or foam etc., you can get drafts from inside the wall in some houses that will throw off your thermostat settings. I've seen this happen and it will drive people crazy trying to figure out why the thermostat won't keep the house at a consistent temperature.
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