How a Furnace Works - Furnace Sequence of Operation

How a furnace works, the furnace sequence of operation. Or in other words how a furnace works and in which order each component is energized. Knowing this will help with furnace troubleshooting, diagnosing, and repair. I also go over the most common reason why a gas furnace won't turn on. When you know in what order the furnace starts up, then you will be able to narrow down your potential problems. Also, there are many different furnaces out there and though the sequence stays very similar from furnace to furnace, there may be some differences. And one more side note. If you turn the power off and on with a Bryant or Carrier furnace, the first thing that will happen is the blower motor will get energized for a minute or 2 to do a pre-purge. After that the sequence would be the same as any other furnace.
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[dominiqgarcia]

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My colleagues were not nice to me and always complain to my boss that I did not do good job,
I stated to hate trade and trade guys but your videos like the light in my life and I really benefit your videos .
God bless you,
You are the man 👍

[hobartzardozerton]

You’re a lifesaver, my heartfelt gratitude. My 90 year old dad was cold and we’re broke and I was able to figure it out thanks mainly to you.

[theskykelly]

I've lived in my house for 20 years, and in just a few minutes now understand how my furnace operates. Thank you, Jay, for a great, easy-to-understand educational video!

[trevorwilliams]

Just started my heating and cooling journey and this guys videos are better than the guy training me 😂😂😂

[gregdoh]

People like you posting these videos on YouTube has saved me tens of thousands of dollars over the past 10 years between my business and home. From car repairs, to building walls, painting, repairing washing machines, servicing water softeners, repairing water heaters, and servicing my HVAC systems. Just last week I opened my RTU's heating panel to check for cob webs and an hour later realized i lost my heat. Turns out the wind blew the flames at my burner and tripped the limit switch which I learned from one of your other videos. I now know to turn the unit off before opening that access panel on a windy day (or just in general). This video was fun to watch to learn a bit more about how these work. Thanks!

[andreeriner]

Jay buddey I like your vidios. Some of these guys you watch come off with like an arrogant attitude. I can’t stand that, you don’t have that. Good for you never change. None of us know everything. I’m 57 years old and I’m still learning. No shame in that. God bless keep up the good work and never change.

[davidwang]

Just when you think his videos couldn't get better. Mr. J did one with a troubleshooting segment in the end. It's like a little test after a lesson, really helps with understanding the concepts better. Which makes practical applications to real problems easier. Man, is this guy good or what?

[robertalequin]

I tried your expert advice on my non working furnace and it worked. more importantly you saved me about 200.00. thanks you are the best tech in you tube that I have found. Excellent teacher!!

[nathanielbennett]

This was a fantastic video. It enabled me to troubleshoot my gas furnace, my igniter was bad, it cost $20 and $5 to ship, and it was easy to replace. Now my furnace works great.

[Newtire]

It's guys like you who help out guys like me and I thank you for your help! You are a lifesaver! I worked on automatic and standard shift transmissions all my working days. No doubt they are complicated but if there was a simple problem, I would always help when I could. It makes for a good customer for life if anything else comes up. They tell their friends too-word gets around. Thanks again man!

[alfonsogaitan]

Dude you just saved my life in hvac school with this video!! Thank you so much keep doing what you're doing.

[pablojimenez]

Bro. You have been a blessing since I started watching your channel and videos. I'm a painter and drywall contractor but I just wanna learn a new trade and you have really motivated me to focus and learn as much as possible about HVAC. I really like how you have the patience and time to go through just about everything and answer questions and different problems and situations you encountered. Thank you so much for doing this and Motivating me.

[binzhang]

You’re really good at teaching non technical audience about how to understand furnace. Well done video. I would pay to get this kind of education.

[prashanthlv]

I wanted to thank you for your videos and helpful troubleshooting steps. I was able to fix my furnace going through your video. THANK YOU and GOD BLESS!!

[charliecamen]

Very informative. You probably saved me between $500 to $600 service call for a fix I completed myself by watching your videos. It is very obvious you know your trade very well. Wish I had a serviceman like you in my area instead of getting scammed all the time.

[MikeAnnarose]

I am pretty handy but a first time home owner and you have helped me so much with my 15 year old HVAC system. I know I need to probably replace it but I'm saving for now. Last year was an igniter and this year first time I tried to start the furnace I had a blocked switch. You've saved me hundreds. My in laws who live with me think I have hands of gold..Thanks to you! 🙏

[l.eng]

The closeup video showing each component along with your easy to understand explanation made troubleshooting so helpful! You ought to be a teacher. Thank you for taking the time to video and post this

[norabder]

I just wanted to let you know that I fixed my unit within 10 minutes after watching this video!!! Thank you so much! Your videos are awesome and very helpful!!!

[crimson-rkdi]

I just moved to a place where gas furnaces are the norm. This really helped my understand how the operation of these units work. Thanks a lot.