Thermostat Wiring at Control Boards

How to wire up a thermostat to an AC or Furnace control board.

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00:00 Costly thermostat wiring mistakes
00:47 Thermostat / Control board relationship
01:26 Control wiring cooling mode
02:11 Cooling isn't always yellow
04:12 Color Codes Lead To Mistakes
04:35 Terminal Functions
05:06 How Thermostats work
06:23 G Terminal Secrets / When there is no Y terminal
08:04 What Fan On/Auto is really for
09:12 Rc and Rh Terminals. Why?
12:24 Wiring Outdoor Unit To Control Board

[josephbelcher]

Thought I was going to have to return my Nest thermostat because old one had RH/RC with jumper. Watched this video and took a look at the wiring on the control board and realized I didn't have to return it. Thanks!

[davidadowlen]

Appreciate the information. You are a good teacher. That is a skill. Many have information and knowledge but cant explain things in a way most can understand. Thank you!

[tedthisius]

I found the video very informative and superior to other videos I have watched. For me the big take away was that the color of the wires might or might not agree with the letter markings on the components. It is the function that is important. One take away from another video is that when replacing a thermostat that has been working but has failed is to take a picture of the previous wiring to use as a reference. I have a thermostat where the DOWN button does not reliably reduce the temperature setting so I am going to replace it with a simple manual Heat/Cool type thermostat. I plan to take a picture first and connect the wires to the same "Letters" as in the picture.

[FiligreedSpeaker]

I knew nothing of HVAC, though wanted to figure it out some since I just moved the thermostat by running a new length of 5 conductor. Everything worked fine, but I had a piece of 2 conductor coming off of it that I now know the function of thanks to this video. You explained all of the functions of the connection in a manner that people could understand easily and clearly without treating us like idiots. Thank you!!!

[andre]

Finally somebody who explains it properly an in understandable english. Thank you very much Mike

[Cowboy_Ash]

This is the most intelligent explanation of thermostat and control board wiring. Thank you Sir.

[RingleberryMcFinklestein]

"You're gonna let some smoke out of a lot of components ." Had me rollin 😆 thanks

[osvaldoramirez]

Finally, someone who can explain something from the inside out. Totally, understandable. I've looked many places for this info. and had to put it together myself to understand, what Mike has explained soo... clearly .Great job, Mike. Thank you.

[mangowalklyrics]

Excellent and concise explanation of the functional relationship between the t’stat and the furnace control board.👍

[jameszandian]

You do an excellent job explaining every key aspect of wiring. Best I have seen on the YouTube.

[asoteico]

Best explanation about Rc and Rh ever seen !!!
Thanks!

[cpaul]

Your channel teaches more than most trade schools. Far better info than somerset county tech. That school was a waste.

[altrmind]

Thanks a bunch. This helped me figure out that my board needs to be replaced

[jcgarayjr]

Very good explanation without all of the 'self advertising'. Excellent channel.

[steverusso]

Best explanation I have seen for beginners.

[skypallman]

You can tell when someone is a G at what they do when they lay it down like this! Majority of the time wiring is just 1 point 2 another and ends up making sense at the end of the day. But having someone lay it out like this it sure does make it easier to learn.

[mxcollin]

This video is gold. Three of your videos have saved me thousands of dollars and I can’t thank you enough man! 👍

[rbm]

Finally how to wire a thermostat and how it works explained so it's easy to understand. I've been looking for a video like this for years! They should show this video in heating and cooling classes. Thank You!

[migueldominguez]

I love your videos!! They are the most educational on YouTube. I really appreciate it. I am a young apprentice starting out in the trade.

[ashwinbhayani]

I really learned the basic of wiring to day very well.
Thank you so much . Best tutorial 👌👍