Basic Thermostat Wiring - How to Wire HVAC Thermostat

Basic thermostat wiring for furnace and air conditioner. I show where the wires go at the thermostat, the color code, then down at the furnace control board, and how to wire up the wires coming from the AC condenser unit outside, from the contactor. Here is the basic color coding that is explained in the video:

Red: Power (24v)
Yellow: Cooling (AC)
Green: Fan
White: Heating (Furnace)
C: 24v Common or Neutral
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⚠️ Disclaimer:
This video is for educational purposes. All appliance and HVAC repair work should be done by a trained professional. Word of Advice TV is not responsible for any possible damages or injuries caused by the use or misuse of the provided information.
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➡ More Helpful Videos:

How to Wire A/C Condenser Unit:
How to Wire Air Conditioner Compressor:
10 Ways to Splice Wires Together:
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Basic Thermostat Wiring Diagram:
How to Wire Indoor Blower Motor:
How to Wire Outdoor Condenser Fan Motor:
Is Common and Ground The Same Thing:
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[brianburlingame]

Jay in this video and the complete wiring for the condenser unit video, has given me a much better understanding of the thermostat to control board, and then control board to other contactor coils and relay coils that pull in plungers to allow the higher voltage go through to the respectable meters as to what they do. He did an excellent illustration of the complete condenser/outside unit, where now the other part falls into place better. Also really clear how he did the wiring of thermostat to control board and the two wires from control board to the side of contactor for the condenser/outside unit. Jay would definitely be a great instructor in HVAC, really appreciate and enjoy his videos on this stuff!

[hornet]

You are an excellent teacher and video producer. You don't skip over details and you explain what you are doing well. HVAC schools need instructors of your caliber.

[edwingaupp]

This dude should write for the" for dummies" books I watch all his videos for a/c makes everything simple and understandable with all needed detail to eliminate second guessing your understanding of topic. Truley gifted teacher

[alexramos]

Dis dude better than my hvac professor.

[stephbugg]

He's the man.... No fumbling around with jargon that makes people feel inferior or like they need years of schooling before grasping these basic concepts. Straight to the point- and gotta 'each-one teach-one' attitude about it all. Not stingy with his knowledge whatsoever. Love it.

[edaldaz]

Wow. You saved me time, money and effort. You are the ONLY video that describes both sides: the thermostat and the A/C board connections. Your sample display made it so easy to understand. Thank you for your expertise and ingenuity. I am a grateful DIY home owner.

[colemant]

You saved me a $300 HVAC Tech charge... Wired my new Thermostat and troubleshoot/replace the condenser capacitor. Clear and Concise. THANKS ! 👍👍👍

[residentmichigan]

My old wires to furnace was old 3 wires cable, and since my old thermostat broke from battery leaking, i bought a new thermostat from gas utility company since they offered me big huge energy saving credit of $50. Fancy wifi controlled thermostat for just $19 after the credit. However, what I didn't know, it doesn't work with old 3 wire cable. I needed to install 5 wires cable. I had no idea how to do it, but after watched your instruction. Yaa, I managed to snake a new cable I bought from Home Depot, and was able to connect property in furnace. Thans a lot.

[akliludagne]

I am a technician and I learn more from your YouTube than school. Thank you for your lesson.

[jhanson]

After watching your video, I was able to correct the wiring of the thermostat and control board. Now my HVAC is working again. You are the

[carolynroberts]

Thanks so much!! We're landlords, and we can now diagnose hvac issues and fix most problems ourselves, thanks to your easy to understand videos. This saves us money, and saves our tenants many hot days and cold nights waiting for a repairman.

[HopeOverComesFear]

I most humble myself and say yes a lot of times you’ve helped me and my father as well and I actually committed on some work am doing on his furnace now and I need to swap out the furnace thermostat but you’ve made it easier to understand because I went for a electric trade but never benefited from the learning but am now seeing the benefits of the knowledge joining it together to repair mishaps at my Father’s house but thank you for passing it forward.

[shirwanour]

This is understandable. When I was doing electrical fundamentals in college I found it difficult but when I watch this video it was helpful. I give it a thumbs up. 👍

[digitaltreez]

Hello J.
My family and I are so grateful for all you do passing on your knowledge. You really helped us out in this recent cold spell. Word of Advice is most definitely one of the best HVAC channels on YouTube.

[technodude]

I will say, I know nothing about how an air conditioner works. But you did an amazing job of explaining it and I was able to understand.

[fernandorosillo]

This video is really helpfull. I'm studying hvac and 2 weeks ago I learned how to wire a thermostat. Thanks for share all your knowledges and I hope some day being a good hvac technician in USA 🇺🇸. I really love this profession.

[nelsonmartinez]

of all the vids I watched on how the board should be wired, this one demonstration is worth quite a lot since he has his displays... excellent diction... easy to fool... right on!

[ATL]

You’re a lifesaver bro! I mixed my wires up and you saved the day!

[jdog]

Yes on the CA glue. It works like a charm on sealing up cuts.

I like your videos. They're informative without a bunch of elementary bs I find on other how to channels.