Thanks for this video you make it so easy to understand I’m a 62 year old woman , my thermostat just broke , quit on me and by watching your video i was able to get my cool air blowing by connecting the wires you specified is is 92 degree here , it will get me till tomorrow when i can go to home depot and get a new thermostat that i till have the guts to instal my self thanks to you !

Mr Jones you most definitely have saved more than a few lives helping people that are at risk of dying from heat stroke and heart failure ..im out of words and so very very greatful for you coming across this WAS NO ACCIDENT .. ..the lord works in mysterious ways indeed... God bless you and all you do ..ima start crying

Thank you for taking the time to explain some of the basics of thermostats to help the DIYs out there. It would also help to explain that there are small relays in the thermostats that have contacts that can fail after so many repeated cycles of make - break and quite often the cause of the problems discussed that arise over time. Also explaining that the Letter Designations on the terminals correspond to the color of the wire used though that is not always a given in each and every installation. Cheers, Victor

Thank you sir. Your knowledge and compassion for taking care of your customers are commendable. I respect you and will call you . Thanks

I watched a few other do-it-yourself thermostat replacement videos but I was left even more dumbfounded than when I first took on this project. Then I played yours and all my questions and concerns were thoroughly addressed. The fact that you took the time and explained not only what wire goes where, but what the function of each wire was, made the whole project crystal clear. And you were the only one to explain why RH and RC should be jumped. Now I'm off to kill the breakers and do the swap. Wish me luck! I'm going in! OK. Project finished! I was a little concerned when the A/C didn't fire up right away, but maybe it just needed a minute or two to acclimate. Now it's working great! All I have left to do is to set the program. That should be simple enough. Thanks for all your help!

Thank you …. I was able to reconnect the wiring on my thermostat for my heat with your helpful video without needing to pay for a service call!! It was not reconnected when moved during a remodel …. so thank you.

Never touched a thermostat, and I already feel like I can take on my new job. Seriously great video David Jones. You are making waves my friend.

This helped so much! Got a new thermostat and forgot to take a picture before removing wires and was so lost. you pointing out the jumper piece did the trick. thank you!

Thanks for the video. There was a reference about the internal software that made me realize that the thermostat was default set up for conventional so I switched the setting to heat pump and the entire system worked perfectly. Thanks for saving me the $500 for a repairman.

This is a nice video to guide you through and the real kicker is to talk to this very nice guy (David) to iron out any kinks. Thanks a lot for your help!

I really appreciate this video and how to test the thermostat. My 81 year old Dad has an older Salem Travel Trailer and the thermostat had to be all the way up at 90% to be able to turn on. Today it quit put out heat all together. This video shows me how to test it...Thank you

Thanks David! You helped my husband and I get our new thermostat working on a heat pump! You are awesome

Thank you so much for this video. My mom lives in Tennessee and she got a new thermostat and wired it wrong and didn't take a picture of how it was. This helps out a whole bunch.

David, thank you so much for a very detailed and informative video. I am a DIYer and a friend thinks their thermostat is bad. I am about to go and check it tomorrow and I would typically look for a wire that may have popped out or a bad thermostat cover that may have not engaged (snapped) back on to the base properly, as she removed it and changed the batteries. I hope she put the batteries in correctly ! Thanks again !! Well done.

Thanks. Watched a dozen videos that didn't help before finding this one. Turned out my thermostat was bad--only way I realized it was by twisting the control wires together as you suggested. I had thought it would be something else because the thermostat is only ~2 years old. Not thrilled with Honeywell, but very grateful to you for posting this video.

You're the man. This was very helpful to me to see the components to trace the wiring too! Thanks

Mister I could give you a big hug. if I hadn't tried ur app I would be cold.my inlaw put me in a thermostat last winter but it never worked.tonight I had my grands over trying to keep house warm with stove but it was still chilly.I tuned to your app hoping to see what I could do to the thermostat put in last winter.i notice a small cardboard between the circuit connection barely visible that said quite remove. I just slid it out an that was the problem.this was something to me an thanks to your video I would still be cold. thanks for helping those that need help like me.

Excellent information provided in this video. Followed the steps and confirmed I had a bad thermostat, which I have now replaced. Everything running now as it should. Thanks for sharing your expertise!!

thank you for doing what no one else has done and explain what each wire does. makes it much easier to understand what your doing. in my case c is common i hooked it up to +24 volts instead of common. thank you...

The world needs more people like you! I’m gonna give it a shot. Thank you.

Thank You so much for showing & teaching me how to replace my Thermostat, this was the best video I saw and I looked at a few and they did not go over what wire went where & what they do…

Thanks for sharing this - I was kind of struggling with some new thermostats and this info definitely did clear things up.

You are a nice guy. Your "bypass" method of testing for bad thermostat is simple and useful. You share a lot of good info with good explanation. Good on ya.

I appreciate your simplifying. You really make it understandable & easy. Thanks I'm Dave Overbey on KZfaq fight & defend.

Your common sense approach made the job simple. Thanks

Good overview - New thermostat is up and running. Thank you.

Best video I've ever watched it's straight to the point easy to understand he accomplished everything he was trying to and no more no less perfect

This is a great and useful video. No fluff, just the straight dope. Thanks.

I wish I lived closer to you, you would have another customer. Thank you sir explained really good.

Thank you. The Honeywell thermo manual said something different. This helped and got us heat. Thank you!

Thanks David. One thing that had me puzzled was that I had Blue wire in the bundle, but the terminals on the Thermostat had no "B", rather there was a terminal marked "C"... I didn't know what C stood for until you explained it, or where I should put the Blue wire. Thanks again!

I am very much convinced of this video, and the kind of explanation that you have to say is also very good, and by showing one thing, you give the message about it.

I am glad it helped.. Thanks for watching

my apartment ac would blow heat then ac and was not sure wtf was going on. I watched your vid and opened up the thermostat and the Orange wire and Yellow wire was reverse connected. After I plugged them in the correct connection AC unit is working now. Thanx for the video from 7 years ago. =)

Thanks for doing your concise easy to understand videos on HVAC, I have learned a great deal from your efforts.

Best video ever , thank you, you just helped me to hook a thermostat to a window AC , most window ACs are not accurate with the room temperature , after that video which is what I need exactly to know what is those codes refers to, I know now where the power should go in and where to go out based on the temperature you set on the thermostat. Thanks again

I never write comments but a great video really easy to understand and you helped me a LOT! Thanks for taking the time!

Absolutely the best video explaining the wiring of a heat pump system with the thermostat. Excellent.

you are so informative in your explanation>>>>

Super helpful video. A while back I used it to learn the basic colors and directions for a 1991 mobile home electric heat pump and I was able to complete the thermostat installation. I was hoping to translate a 1953 gas furnace, but inside was TH1 and TH2 AND TR'S and jumper wires and it's a mess, so I think it's time for a professional. Lol

Mr. Jones , You are Saint! Thanks for all you do.

Thank you for posting this, it helped me install my new Honeywell digital programmable thermostat in a house that was built in 1953 -- and had two separate thermostats... one for the original oil heat system, and one for the retrofitted air conditioning that was installed in the 80s.. works like a charm!

You are awesome. After watching this I am not scared to tackle changing my existing Honeywell T8602D2018 thermostat to Honeywell TH9320WF5003 Wi-Fi

Very cool that you made this video! Great job!

This man is "the man".

Perfect! Thank you for your video, this was exactly what I needed. I was able to replace my thermostat w/o a problem.

THANK YOU!! You solved our AC Wiring Problem. Many thanks from Canada

I appreciate the video information and your desire to help those of us who don't know wiring and functioning of the thermostat. I'm trying to figure out which wire will allow me run y thermostat without batteries. Thanks for sharing your experience!

Thanks so much Mr. Jones. Great explanation...

Thanks for your help! You explained the definition of the wiring that got me up and running. Yup bad thermostat. Thanks again 👍🏼👍🏼

Thanks for the 4 minute refresher on the wiring I've done it before but 15 years don't go along too well don't get along too well with my memory, thank you very much you are very informative ☆☆☆☆☆

Thank you so much!!!you just saved a phonecall and money. So great ful to people like you who like helping. Keep up the great work Sir.

Wonderful video. Thanks for showing the demo parts.

Thanks! I just replaced my old round Honeywell with a new programable thermostat. On my old Thermostat the Blue wire was placed on the Y terminal. When I wired up the new one I put the Blue on the B terminal. No wonder my AC compressor didn't come on. I didn't have a Yellow wire and had no idea that I was leaving the AC compressor with no control wire. Your video showed me just what I needed and taught me a lot. Now the blue wire is back on the new Y terminal and everything is working fine. I don't need a common wire? Thanks again.

Mr. Jones, you are the man. This is going to help me install my ecobee4.

Great video. Thanks. Very helpful.

I have an issue. I tried replacing an old analog thermostat (2 wired), with a newer programmable Honeywell thermostat on an old Coleman presidential 2 on my mobile home. Once I switched the power on on the furnace, the ac started blowing. No matter what function I changed on the new thermostat the ac would not turn off. Any suggestions?

Great video with easy to understand wording and excellent visuals!

Thank,you I'm hooking up a lux the first one I've ever done and I appreciate you explaining what the wires mean..I hope I can do this alone

Mr Jones, thank you for the educational videos, Im in NJ, Im wondering if I could wire my stream oil furnace and central AC unit to a single thermostat. i currently have a Honeywell T87F controlling the furnice, and a Honeywell T8112C controlling the AC unit. thank you

Great Video. Was able to diagnose and fix my problem of heat not blowing with heat pump. The orange wire not in the right spot.

Exactly what I needed, thank you!

My house had two thermostats, one for AC (upstairs) and one for heat (downstairs). I want to wire it so that it all runs on one thermostat (upstairs). Do i connect the positive or negative to the W from the furnace?

Thanks so much for making this clear. I was so confused between heat strip heating vs. emergency heating which i understand uses the same heat strip.

You deserve every view and subscription you get sir. There is enough to go around for all of us. Wish I was your apprentice i'm in Deltona Florida planning on starting hvac course at Daytona state college this januarry 2019. I was born with one hand but I have my whole arm, want to get a trade to help my family, already a licensed barber and real estate agent. Thank you .

I need help with installing a new thermostat. "Honeywell" my old setup has a jumper to r and RH. And one more to Y to w1? Install my new thermostat and when I'm set it to cool the heat comes on? I can send pics to you?

Getting ready to install a Honeywell and this looks simple enough to do. Thanks.

Thanks, good information explained so even a dummy like myself can understand. You have a gift for this kind of thing. Keep up the good work.

Thanks for the info, very helpful. I need to install the new generation thermostats that works with ATT. this is up here in NY, if the c wire is not present, can I draw the 24 volts from the rh by pulling a jumper to the c so the thermostat gets powered? Also is there another way to test the thermostat? I have tried 2 of them and neither went on for some reason although I had 24 volts at both the rh and the c

I needed to replace my thermostat but could not access the electrical panel to turn off the power. I was worried about getting a shock and could not find a proper answer. This video clearly showed that you won't get a shock from 24v ( just don't let the other wires touch the Blue wire). Also finally learned what each wire does

Thank you for the info it worked perfectly!

Last Fall my AC compressor was coming on when the heat would turn on. I had turned the circuit breaker off for the AC so I could troubleshoot it in the spring. Now that it is spring, with the AC power turned back on, the AC will not turn on. Both the blower fan motor and the compressor are not coming on in AC mode. The heat is working normally. I do also have the thermostat set in the HOLD mode so I could rule out a program error/issue with the thermostat. Any ideas. Thanks and very detailed video. I gave you a sub too.

thanks for posting this video! we were freezing! this video showed me my thermostat was bad and saved me a a bunch of money and my wife loves me again!

nice job been looking for someone to explain this in layman terms

Thanks for sharing this video David. I am new to HVAC this is a very helpful!!!

Thank you so much this helped me a lot 👍🏾👍🏾👍🏾

Nicely explained. For people like me, a diagram is very helpful. Thank you

Question: My old thermostat has only two wires - black and red. The thermostat has no setting for just turning on the fan. I want to be able to turn on the fan only, so I bought a new thermostat with a fan function. How do I get it to make the fan turn on?

Much appreciated. You are a nice person for sharing your knowledge and experience. Many thanks.

will a lennox conventional or heat pump thermostat work on a boiler?

Thank you. Very informative.

Good video. I have a problem with my Lyric thermostat displaying an insufficient power error. I tested my wires red to yellow and red to white and there are 27 volts. However, red to blue and red to green only shows about 14-16 volts. Do I have a bad transformer?

Thanks for this, between your video and another website reference.. I was able to gain the understanding of the system at the thermostat wiring level well enough to navigate my issue. I attempted to get my local HVAC technician to handle this matter initially, but his quote and subsequent rate was laughably ridiculous to me. I specified that my issue was: 1-2 wires being moved into a different terminal, a process that takes less than 2 minutes to resolve (excluding travel time) with a basic knowledge of those standards and a small flat-head screw driver. I look to empower local businesses and professional trades, but its ridiculous quotes and rates like that that turns home owners into do-it-yourselfers. It's pretty gratifying to solve my issue and 'save' $90 in 2 minutes of effort beyond the time it took to watch this video and read a couple paragraphs on a resource site, but I can't help but feel disappointed that I can't just delegate the matter to an individual who embodies and/or represents the industry without these obnoxious value of time and service, cost consideration. I mean, I feel at odds about the whole state of affair in these interactions.

Excellent video. When I connect the Red wire to the Compressor wire, both furnace fan (the fan beside the furnace in the basement) and the outdoor AC fan run. But when I connect the Red wire to the Fan wire (green), only the furnace fan runs. I want to have the AC on, so I left the Red wire being connected to the Compressor wire. Is that how it is supposed to be? I thought for AC only the AC fan outside the house should be running.

Thank you so much, this just saved my night!

great video David

thank you, thank you, for a novice this really helped me to understand the what was doing what in trying to see if the problem was the unit or not... again this was done very well.

Thank you for this video, this was very helpful.

Wow, clean explanation. Thanks!!!!

Excellent video. Thank you for sharing your skills.

I want to swap a very old, 2 wire (white and red) thermostat to a 7 day programmable. The furnace is oil fired for baseboard hot water. There is no AC. I'm trying to confirm that the white wire will go to (W) and the res wire will go to (RH). Thanks for the help!

hi Dave thanks for that grade video I'm having a problem with my AC condenser it is still clicking on and off while I have the thermostat on heat can you please help

Thanks for the information. very informative.

Ty sincerely Sir. Broke wiring down to the utmost.

Thank you your an answered prayer my moms thermostat had been not properly fixed to the wall and got yanked off by bumping against it and she has been struggling with out ac for a few weeks now shes 78yrs old and we cannot afford a professional to come and do this ive been reading everything I can to learn to wire this pro 1.t701 and get it working i don't know what id do if she has a serious deadly irreparable health issue because of the heat thankyou thankyou thankyou thankyou. ❤i do have questions. ....

on these newer t-stats do you still need to jump the y and w for a heatpump?

This was an incredibly informative video. This stuff was just beyond my grap and you put right in reach. Made it much more simple. Thanks.

As luck would have it, this is the exact same thermostat I just used to replace the old mechanical one. I picked it up for a buck at a thrift shop, works fine!

David, I live in California and keep hearing about heat pumps, do they work well when we have highs of 100s and lows of 40s. Tim

Excellent video!