Gas Furnace Won't Turn On? Nothing Happening? 8 Reasons Why!

Рет қаралды 489,524

Күн бұрын

In this HVAC Training Video, I Show 8 Reasons Why a Gas Furnace Won't Start Up, Won't Come On! I Show the Troubleshooting Process Step by Step! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #gasfurnace #reasons #furnace #stepbystep #operation #troubleshooting
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Пікірлер: 236

@kleankash88 10 ай бұрын

UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust kzfaq.infoUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . No issues at all. Very happy with it.UPDATE: After 6 months of use and over 70 uses I would still highly recommend this pressure washer. It does vibrate a decent amount but never had it “walk” like others have mentioned. No oil leaks, still seems to run like the day I bought it. Still cranks within 2-3 pulls every time. Very happy with my purchase!Have used it about a dozen times now. Plenty of power, cranks up on 1-2 pulls every time. My only complaint would be I wish it was a little taller to make it easier to walk with it (hits my ankles a lot) and that the two hose connections were a little further apart but it hasn’t caused me any issues. Seems to run a good 1-1/2-2 hrs on a full tank, overall a well built machine and definitely worth the money in my opinion.

@thecreativehuman75 2 жыл бұрын

You’re the best HVAC instructor on KZfaq.

@alfonsobenitez8574 2 жыл бұрын

You are a wonderful technician, I am retired license contractor and enjoyed watching HVAC videos. Still do some work here and there. Only have my right arm, but that doesn't keep me from doing my work. Thanks a million. God bless you.

@samsonleung1708 2 жыл бұрын

I like your microwave magnet.

@JimEverette 11 ай бұрын

I changed the capacitor on my out side condenser fan , ac unit won't still start , thermostat Stat have battery,

@gregsewell4259 4 ай бұрын

My girlfriend's furnace wasn't getting any heat. Her inducer wasnt turning on. A volt meter showed it wasn't getting any power. Another (different) video told me it was the HSI, so i replaced it. But that didn't fix the issue. Another video told me it was the flame sensor. I changed that too, and that didn't do it either. A third video told me to change the motherboard as the inducer and HSI weren't getting power. So I bought a new motherboard and changed it, but that too didn't fix the issue. I came across your video and learned in step #5 that weak batteries in the wall controller could be the culprit. Her house has two controllers, one upstairs, one downstairs. The upstairs wall controller displayed working digits in the display. Even so, I opened it up and saw that the batteries were corroded . So I changed the batteries in the upstairs unit. But that still didn't fix the issue, even though I cleaned off the terminals as well. The downstairs wall controller had a functioning display also. However, when I changed the batteries in the downstairs wall controller, the heat came on! So lesson learned, sometimes it's the simplest thing. My batteries had enough juice to work the display, but we're too weak to run the heat. Luckily for me all the parts I had purchased over these last two weeks, including the motherboard were returnable as I got them all on Amazon. Thank you for posting this video and helping me troubleshoot her issue, it saved my girlfriend a grip of cash on a service call.

@todaywithtom 2 жыл бұрын

One of the best videos of this type I've seen. It's good for both novices and experienced technicians alike .

@MLEB723 2 жыл бұрын

Best HVAC Troubleshooting video I've seen in a long time...I'm here because my Rheem Furnace does nothing, the fan won't even come on when I turn it on at the Thermostat...You gave me a lot of things to Check...Thank You.

@sunflwr729 2 жыл бұрын

Thank you!! Within the first minute you provided the reason why my furnace was not turning on. I thought I'd have to call the company that installed it (which I dislike) and pay them for the visit. I appreciate this!!

@jimmyhelvig5609 3 ай бұрын

You guys are awesome and very thorough. I’m a 5 year HVAC TECH, installer and maintenance guy and I’m still learning every day.

@acservicetechchannel 3 ай бұрын

Thanks for watching!

@goodluckchuck 3 жыл бұрын

Incredibly well illustrated, concise, and helpful. Greatly Appreciated Kind Sir!!

@acservicetechchannel 3 жыл бұрын

Thank you kindly!

@djginza 2 жыл бұрын

@@acservicetechchannel and a horrible 8

@pauldembowski5465 2 жыл бұрын

Thank you for that education that was straightforward I could totally understand what you were showing me and very thorough and simple. Well done!

@shaniquabowden3638 Жыл бұрын

Thank you so much! I've been watching videos all night and in the first 2 minutes you fixed my problem by telling me about the door switch! OMG! I almost slept all night in 8 degree weather. And your video was the only one that mentioned the gas switch, which was my original issue. But while troubleshooting, I left the door open. Thank you so much!!

@walkingdeadman4208 4 ай бұрын

Dont you hate it when it something easy like that . Its nice though

@adventuresforall 2 жыл бұрын

THANK YOUUU. I am not technically literate at all AND THIS helped me solve my issue without having to get my landlords involved and it saved them money! Thanks so much

@ontube781 Жыл бұрын

I'm in HVAC and have experience but still watch your videos. They're very helpful to keep a refresher and keep you away from bad habits

@seattlesusan5464 Жыл бұрын

I switched on the thermostat and immediately turned it off. That action killed my furnace. Thanks for showing the black smudge in the center of the blown fuse which helped me identify the problem. A quick trip to Autozone for a 3 amp blade fuse and now my furnace is back in business.

@eappan100 Жыл бұрын

Very good narration, precise with all necessary details to troubleshoot the problem!!

@rauledom 2 жыл бұрын

Thank You! I did not close the cover properly when I changed my filter, your video gave me a solution. Thanks again!

@ryanchristensen4291 Жыл бұрын

I really want to thank you I am a 22-year-old I own my own house and it’s people like you who make that possible. My furnace wouldn’t light and thanks to this video I found out it was a bad transformer and repaired it!

@irishkevin4307 2 жыл бұрын

great vid...like your troubleshoot display set-up. so much easier troubleshooting the older equipment when there was just a fuse/breaker, simple thermostat, transformer, oil burner, or gas valve...so much for new technology...!!

@5452347 Жыл бұрын

AMAZING video, thank you so much for taking the time to share your knowledge.

@kcla83 3 жыл бұрын

Thanks for the helpful video, replaced the fuse, works like a charm.

@acservicetechchannel 3 жыл бұрын

Excellent!

@marcussmith5419 3 жыл бұрын

Ur the best u have not yet fell me. I have read your book and it’s everything a technician needs to know. Thank you once again for sharing your knowledge

@acservicetechchannel 3 жыл бұрын

Wow, thank you!

@repairitdontwreckit4257 2 жыл бұрын

I’ve watched most of your videos. They always have great, accurate content. Bought your book. Excellent reading. Well put together. I installed my own split ac system using your videos and book. Everything went smoothly. Thanks.

@samuel4ya 5 ай бұрын

I’m oo

@swimdadio4052 Жыл бұрын

Very helpful. Professionally done. Great job.

@jimbola77 3 жыл бұрын

Awesome VIDEO PRESENTATION!!!! THANK YOU FOR SHARING!.

@acservicetechchannel 3 жыл бұрын

Thanks for watching!

@NapkinEdStern Жыл бұрын

This video just saved me a few thousand dollars!

@Dremdude 2 жыл бұрын

Saved me a service call. Blown fuse. Thanks very much

@MrTenaciousRob Жыл бұрын

To the point and you helped me solve the issue! Thank you!

@Alex-jo2oi Жыл бұрын

Your videos are the best Craig. Thank you so much.

@jimmysegovia2688 3 жыл бұрын

awesome!!!! i missed this one! thanks craig! knowledge is power.

@acservicetechchannel 3 жыл бұрын

Glad you liked it!

@user-rq8ig9sv9y 2 жыл бұрын

you are really nice .thank you so much

@pizzle1011 3 жыл бұрын

Very easy to follow, thanks again

@acservicetechchannel 3 жыл бұрын

Glad it was helpful!

@lancerudy9934 3 жыл бұрын

Thanks for all the great videos!

@acservicetechchannel 3 жыл бұрын

My pleasure!

@NorCal-refrigeration 3 жыл бұрын

It’s coming into heating season and it heating video time and this is a great one. 🤘⚡️🤘

@acservicetechchannel 3 жыл бұрын

Thank you very much Nor-Cal! I appreciate it!!

@jaime5659 3 жыл бұрын

@hkhsm359 3 жыл бұрын

nice video. great knowledge. thank you for sharing.

@acservicetechchannel 3 жыл бұрын

Thanks for watching!

@waltp3373 3 жыл бұрын

Excellent analysis and explanation.

@acservicetechchannel 3 жыл бұрын

Thank you kindly!

@deffy750 Жыл бұрын

Just wanted to thank you so much sir I really appreciate all the info 👍 really helped me out

@alaaalshaikh369 Жыл бұрын

Thanks a lot I fix my ac because the fuse was burnt if I have to wait for my landlord to fix it will take weeks

@MrFrenchHarp 2 жыл бұрын

I want that magnet!!!! Tape gets old. Btw… 23 year Hvac owner here. Very concise video. Great information.

@dane1234abc1 3 жыл бұрын

I have another reason for your list: I had a HVAC contractor who shall remain nameless install a new 90% condensing furnace and new central AC system in 2015. Worked great. In October 2018 it finally turned cold, and I switched my thermostat from "cool" to "heat." Could hear the blower come on, and the furnace's high voltage igniter cycling, but the main burner would not come on. Called HVAC contractor who installed, and with which I had a "priority customer" annual maintenance contract. Sorry, they couldn't send anyone to my house because my area was under wild fire "warning evacuation." So suffered through 5 days of no heat until evacuation warning was lifted. When tech finally arrived, took him about 3 minutes to discover that a slide switch behind the furnace cover that controls power to the solenoid that allows natural gas to flow to the burners was in the "off" position. I didn't even know such a switch existed. Apparently the tech who did my annual maintenance check earlier in the year for some reason left the slide switch in the "off" position. Got a profuse apology, and I expect that the tech who did the annual check up is still getting razzed about it.

@bhajansinghriar7020 3 жыл бұрын

Thanks sir.Great diagnostic help.

@acservicetechchannel 3 жыл бұрын

So nice of you

@user-hl9hb9wf9o 6 ай бұрын

Excellent video, 5 amp fuse saved me a service call! Thanks for sharing your knowledge !

@hursutozkul1316 2 жыл бұрын

Thank you. You saved me a few hundred bucks!!!

@Shutyourjibbs 3 жыл бұрын

Great video, thanks!

@acservicetechchannel 3 жыл бұрын

Glad you liked it!

@markbarber1920 3 жыл бұрын

Great Video, what about checking the resets on the the limit and roll out switches?

@drewhunter8615 2 жыл бұрын

Thanks for video! Made me look like a hero to my little girls.

@pk7580 3 жыл бұрын

Very nice video. Thank you!

@acservicetechchannel 3 жыл бұрын

Many thanks!

@rmeken 3 жыл бұрын

Great explanation it will come in handy

@acservicetechchannel 3 жыл бұрын

Glad you think so!

@robertlongoria765 2 жыл бұрын

Thamks.

@randybirkeland3331 3 жыл бұрын

Good troubleshooting Craig. As a master electrician, I have one tip though. Some naturally assume when they have a 0 volt reading that there is no "hot". It could also be a faulty neutral. At 8:02, you are checking the inducer fan supply by probing the hot terminal and the common neutral point. More accurate would be to check both the hot and the neutral right at the connector plug. This insures you have not lost your neutral between the common point and the connector plug.

@PBS-nm1uu 3 жыл бұрын

@Danny-fs1hk 10 ай бұрын

Thanks for that info!

@AZ_sunshine Жыл бұрын

another great video. so happy i suscribed back when I first needed help. thanks for all your help and great videos.

@manuelesquivel6153 Жыл бұрын

Wow yeah of course its really helpful thanks ,

@zekenzy6486 3 жыл бұрын

Great Video. Have a nice weekend. Thank you for sharing ^_^

@acservicetechchannel 3 жыл бұрын

Thank you! You too!

@donnierobertson3088 3 жыл бұрын

Great job and video

@acservicetechchannel 3 жыл бұрын

Thanks Donnie!

@argenismoreno8838 3 жыл бұрын

Thanks for this Great video. 👏👏👏👏🙋‍♂️🇻🇪

@acservicetechchannel 3 жыл бұрын

Glad you enjoyed it!

@calsa5542 2 жыл бұрын

Thanks! Saved me a technician fee 🙂

@qcitizen6738 3 жыл бұрын

Excellent.

@acservicetechchannel 3 жыл бұрын

Thanks for listening

@elbo530 3 жыл бұрын

Great video my friend!

@acservicetechchannel 3 жыл бұрын

Thanks for the visit

@tonypointer7026 3 жыл бұрын

Very good video

@wisdomwisdom817 5 ай бұрын

Awesome job thank you so much

@mandarg3243 3 жыл бұрын

Thank you so much, I followed your precise instructions and was able to figure out the fuse issue on the control board

@acservicetechchannel 3 жыл бұрын

You're welcome!

@aprendamosconreneamaya725 3 жыл бұрын

Thanks

@acservicetechchannel 3 жыл бұрын

Welcome

@toolemanful 3 жыл бұрын

Thank you

@acservicetechchannel 3 жыл бұрын

Welcome!

@robertemberton8190 6 ай бұрын

Very helpful, thank you very much!

@acservicetechchannel 6 ай бұрын

Thank you for watching! I'm glad the video was helpful!

@goldfinch1384 3 жыл бұрын

Another problem you could have is a bad pressure switch or clogged air tube for the switch. Great explanation.

@acservicetechchannel 3 жыл бұрын

Sure, thanks!

@joecostu1571 3 жыл бұрын

Where is that p. S

@matthewmenard3014 2 жыл бұрын

You talking about the tube that measures negative pressure off the inducer motor? We call it combustion motor

@matthewmenard3014 2 жыл бұрын

But he is demonstrating why it won't turn on. The sequence of operation is another thing.

@qzorn4440 8 ай бұрын

A most excellent video. Thanks.

@acservicetechchannel 7 ай бұрын

Glad you liked it!

@MemeKing44 3 ай бұрын

great vid thanks!

@Rick-tb4so 3 жыл бұрын

Great video..

@acservicetechchannel 3 жыл бұрын

Thanks for the visit

@ogyywinn6035 3 жыл бұрын

well explained

@acservicetechchannel 3 жыл бұрын

Thank you!!

@zackzarate Жыл бұрын

GREAT VIDEO

@xtremecomfort7799 3 жыл бұрын

You are a The Man!!!!!

@acservicetechchannel 3 жыл бұрын

Glad you enjoyed it! Thank you for the support!!

@sparky5860 Жыл бұрын

Great video…..👍

@Peter-fu3fm 2 жыл бұрын

Great videos! Recently I replaced a broken secondary fuse on the furnace and a thermostat for my Bryant Heating and Cooling System, and the LED showed a solid red light. However, when I tried to run it two days ago, the LED turned off, but the new fuse on the furnace and the new battery-powered thermostat, as well as the breaker for the furnace are still all intact. Could you give me an educated guess as what could be wrong? Thank you!

@Gary-ts6dh 2 жыл бұрын

3:10 - No need to pull the fuse to check it: after verifying 24volts to the board, if you measure 0volts across the fuse, it is good: if you measure 24volts across the fuse, it is blown.

@5863carlitos Жыл бұрын

outstanding!!

@acservicetechchannel Жыл бұрын

Carlos, thanks so much!!!

@IFreshhx 2 жыл бұрын

Some furnaces the Inducer isn’t the first to cut on sometimes it’ll actually be the blower motor if the system has to pre purge

@_Antboogie 7 ай бұрын

Great video brotha

@bradsteeves5403 Жыл бұрын

Got motor together furnace is in a cold room that what cools the gaps exhaust that comes out of the furnace is 76% volatile when the furnace that produces Heat sucks are the sewer line on the floor to stop making a positive and negative charge in the ions in the air which what allows the water to go out the tube instead of buildup in the combustion chamber

@josechavez7922 3 жыл бұрын

thanks you you just save me sone money

@PBS-nm1uu 3 жыл бұрын

how can you tell which relay control what, again love all your videos

@acservicetechchannel 3 жыл бұрын

If you really wanted to know, you would need to follow the solder lines on the back of the board, thanks!

@cynthiafeinen2841 Жыл бұрын

Should start with the batteries in the thermostat. That anyone can check and fix. Unfortunately it was the last and after I panicked not having a voltage meter trying to figure out what I was looking at based on your pictures it was just the batteries. Thank goodness for that and thank you for number five telling me to check them would've caused a lot less anxiety. Had it been number one problem. Especially since I had no idea thermostat even had batteries. 😂

@dreadone6894 3 жыл бұрын

5:40 Reason #4 How to determine if the thermostat wires are touching or are Brocken ? Resistance ? OL ?

@EvilJ069 2 жыл бұрын

Danke! My problem was fixed by replacing two 15 year old batteries I didn't even know about

@acservicetechchannel 2 жыл бұрын

Nice!!!

@armziusthezealot4072 3 жыл бұрын

Great video and great explanations. Saved me...the door switch i never knew about and that was it! Thanks a lot

@acservicetechchannel 3 жыл бұрын

Glad it helped

@jerseyjim9092 2 жыл бұрын

I have an old Weatherking with a fasco inducer 7058-0049. Is it possible to replace just the motor? It has 3 bolts attaching it to the main part of the inducer so it seems logical but I couldn't find the motor online anywhere.

@union537 Жыл бұрын

I have a Goodman package unit that the brand new inducer motor fails to run. There is 240 volts at the L2 and black wire on the circuit board. When heat is called for the inducer motor will bump turn about 1/4 rotation then stop. What’s my next move in troubleshooting? Thanks for the videos and your time.

@greywolfstormdragan5761 3 жыл бұрын

Can anyone help with cleaning instructions for an old locke stove co. warm morning model v-30 natural gas heater.

@patriciawalsh5809 3 жыл бұрын

thank you batteries in thermostat replaced now it is working

@acservicetechchannel 3 жыл бұрын

Glad it helped

@Irwhodunit 2 жыл бұрын

The only part I'm qualified to do is checking the batteries in the thermostat. It didn't help, but I'm making progress. Thanks for doing the video.

@chriswebb810 8 ай бұрын

I had a tenant yesterday with no heat. Inducer fan ran, blower ran but the burner wouldnt ignite. I found a loose connection down at the blower. Im assuming a neutral. It was a small white wire wirenutted to a white larger wire coning off the blower

@sajjanlama1ify 2 жыл бұрын

hay craig can you make vidio how to set up dip switches on furnace with manual please

@tomahawk5959 Жыл бұрын

Did you check the low frequency transmitter?

@kevinheimer 8 ай бұрын

My Goodman Gmp 100-5 gas furnace started up and worked fine as usual for a week or two this fall and then went dead. Totally dead with no sound, no inducer start up, nothing. Took off covers, pushed in cover switch and checked error code on main board. 3 blinks. This means pressure switch malfunction. Since I'm not HVAC trained, and only partially understand the actual sequence of operation, I got sidetracked and misdirected and began checking all the pressure switch videos. KInda dumb since obviously if the inducer motor isn't working (first step) then the pressure switch (2nd step) can't work. The point is that error codes are helpful but you have to be aware of how the system actually works, step by step, or you can waste time, like me. Anyway, after I took a break I realized I was barking up the wrong tree and started to focus on the inducer moter itself. Luckily found this AC Service Tech video. Great info! I'm no electrician either but after watching the video, checked voltage at pressure switch while trying to start furnace and only got momentary 24v so I tracked the pressure switch wires back to the main board. They both are right next to two relays and when I tapped one, the furnace started up! Tapped it again and the furnace shut down. Bad relay. Never would have found it without watching this video first! So I need a main board which runs around $130. but at least I definately know 100% that ordering it will solve the problem. Looks like a no-brainer to pop off the main board and plug in the new one. And to all you HVAC pros laughing out there, at least I knew about the back cover switch! Thanks again AC service guy! I subscribed to your site for the next time this POS Goodman goes south on me.

@katropa5664 2 жыл бұрын

what lubricant using for fan bearing?

@whiteape151 3 жыл бұрын

Thank you, you just saved me some money. A prong on my thermostat was mashed down. My brut of a hubby smashed it after replacing the batteries.

@user-rq8ig9sv9y 2 жыл бұрын

😬

@juanacosta2788 3 жыл бұрын

What a great video do you have a work book I wanna buy one and a service book

@acservicetechchannel 3 жыл бұрын

We have a book, workbook, and quick reference cards on our website! www.acservicetech.com

@joeydelmarsjr.646 3 жыл бұрын

im a DIYer and you did not mention the start up sequence for each component when the furnace start up and which components are NO or NC

@candyrussell298 Жыл бұрын

I have a whirlpool model number whgA100a46AI0 hvac 2 individual fan units outside two thermostats. My heat worked upstairs last winter. Now the fan blows cold air no heat

@gpsperez5193 2 жыл бұрын

Hello I have a question i have an older model ruud furnace i don't have sparkon the ignitor i can smelled the gas , can hear the inducer motor when starts looking for solutions any advice thanks

@OldWorkingMan 3 жыл бұрын

Thank you so much for the videos. I have an old furnace ( NUGI100AF01) that I have to frequently reset the power to get it to kick on, just turn off the furnace power, turn it back on and it kicks on - it started failing last January. I cleaned the ignitor but the problem persists. I noticed that the ignition cable has electrical tape at the boot seam that I did not put there, and I have owned the house 20+ years, so I ordered a new ignition cable and if that doesn't fix it I will order a new ignition module (S8610U) - shopping around the parts are fairly inexpensive. After watching this video, I will replace the old thermostat tomorrow. My only question = Is there any one thing that will most likely cause this type of failure? Thanks again.

@user-rq8ig9sv9y 2 жыл бұрын

In my idea is the first you can check the power switch connect.

@joeanonimous1105 8 ай бұрын

When I turned on my furnace on last night, for the first time since last Fall, it began to heat the house, then quit. When I went to check the thermostat, I could hear a series of clicks through the air return grate. I hear one click, then a pause, then two clicks in rapid succession, then a pause, then it repeats. Same thing after turning it off then back on. Same thing after it being off overnight. Does that symptom indicate any particular source of the failure??? Thanks in advance for any assistance.