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

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  • Опубликовано: 15 янв 2025

Комментарии • 249

  • @jimmyhelvig5609
    @jimmyhelvig5609 10 месяцев назад +12

    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.

  • @alfonsobenitez8574
    @alfonsobenitez8574 3 года назад +27

    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
      @samsonleung1708 3 года назад

      I like your microwave magnet.

    • @JimEverette
      @JimEverette Год назад

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

  • @thecreativehuman75
    @thecreativehuman75 3 года назад +7

    You’re the best HVAC instructor on RUclips.

  • @jeffflindall7501
    @jeffflindall7501 3 месяца назад +2

    My furnace was not working. I had no clue what to do. Went through your video and managed to get my furnace working! Thank you for taking time to make this video to help people like me!

  • @MLEB723
    @MLEB723 3 года назад +1

    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.

  • @shaniquabowden3638
    @shaniquabowden3638 Год назад +3

    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
      @walkingdeadman4208 11 месяцев назад

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

  • @sunflwr729
    @sunflwr729 2 года назад +2

    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!!

  • @seattlesusan5464
    @seattlesusan5464 2 года назад +5

    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.

  • @kleankash88
    @kleankash88 Год назад +53

    UPDATE:1 year and still cranks within the first 2-3 pulls. Probably will buy another when this one finally does bite the dust ruclips.net/user/postUgkx43QMbQqu67IZadu9ou8Sg1BdrunMRNqX . 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.

  • @todaywithtom
    @todaywithtom 2 года назад +3

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

  • @ontube781
    @ontube781 2 года назад +3

    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

  • @ryanchristensen4291
    @ryanchristensen4291 2 года назад +4

    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!

  • @drewhunter8615
    @drewhunter8615 2 года назад +1

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

  • @eappan100
    @eappan100 Год назад +1

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

  • @randybirkeland3331
    @randybirkeland3331 4 года назад +12

    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.

  • @NapkinEdStern
    @NapkinEdStern 2 года назад +1

    This video just saved me a few thousand dollars!

  • @dane1234abc1
    @dane1234abc1 4 года назад +6

    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.

  • @Dremdude
    @Dremdude 3 года назад +2

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

  • @RobertFranklin-o1s
    @RobertFranklin-o1s Год назад

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

  • @swimdadio4052
    @swimdadio4052 Год назад +1

    Very helpful. Professionally done. Great job.

  • @Alex-jo2oi
    @Alex-jo2oi 2 года назад

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

  • @Frady505
    @Frady505 2 года назад +1

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

  • @beemikeme
    @beemikeme 3 месяца назад

    Very good teacher!

  • @hammec111
    @hammec111 5 месяцев назад

    Thank you for making this Video. After my air conditioner would not start up, I followed your steps and traced back to power issues. I found a faulty safety switch with a float located in the pan.

  • @marcussmith5419
    @marcussmith5419 4 года назад +1

    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

  • @waltp3373
    @waltp3373 4 года назад +1

    Excellent analysis and explanation.

  • @MrFrenchHarp
    @MrFrenchHarp 3 года назад

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

  • @goodluckchuck
    @goodluckchuck 3 года назад +10

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

  • @NorCal-refrigeration
    @NorCal-refrigeration 4 года назад +15

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

  • @rauledom
    @rauledom 3 года назад

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

  • @kcla83
    @kcla83 4 года назад +2

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

  • @gregsewell0
    @gregsewell0 10 месяцев назад +1

    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.

  • @MrTenaciousRob
    @MrTenaciousRob Год назад +1

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

  • @goldfinch1384
    @goldfinch1384 4 года назад +8

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

    • @acservicetechchannel
      @acservicetechchannel  4 года назад

      Sure, thanks!

    • @joecostu1571
      @joecostu1571 4 года назад

      Where is that p. S

    • @matthewmenard3014
      @matthewmenard3014 3 года назад

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

    • @matthewmenard3014
      @matthewmenard3014 3 года назад +2

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

  • @AZ_sunshine
    @AZ_sunshine Год назад

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

  • @pauldembowski5465
    @pauldembowski5465 3 года назад +1

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

  • @adventuresforall
    @adventuresforall 3 года назад +2

    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

  • @ranlitt3201
    @ranlitt3201 2 года назад +1

    My switch that should be closed has 2 wires connected that look like they were cut. Would that matter? I didn't notice them cut until a tech was here. Please answer? You show it at 1:24

  • @kuchb01
    @kuchb01 2 года назад

    Been troubleshooting my furnace for several hours 12/30/22 into 12/31/22. Took the doors off earlier today for an inspection - didn't know that there was a door switch that was preventing my furnace from turning back on. When I finally realized the main issue was that the furnace was not getting any power (checked the on/off power switch, checked the breaker) but it wasn't until I found and watched first 1:25 before my problem was solved. Held the Door Switch closed with my finger, and vuolla! After about a minute the furnace was back to running like before. Installed the door and my next step will be to invest in a magnet like you have to hold that puppy closed. Thank you sir! Very much appreciated!

  • @bhajansinghriar7020
    @bhajansinghriar7020 4 года назад +1

    Thanks sir.Great diagnostic help.

  • @hursutozkul1316
    @hursutozkul1316 3 года назад

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

  • @robertemberton8190
    @robertemberton8190 Год назад

    Very helpful, thank you very much!

  • @alaaalshaikh369
    @alaaalshaikh369 2 года назад +2

    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

  • @qzorn4440
    @qzorn4440 Год назад

    A most excellent video. Thanks.

  • @repairitdontwreckit4257
    @repairitdontwreckit4257 3 года назад +5

    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.

  • @calsa5542
    @calsa5542 3 года назад +1

    Thanks! Saved me a technician fee 🙂

  • @_Antboogie
    @_Antboogie Год назад

    Great video brotha

  • @qcitizen6738
    @qcitizen6738 4 года назад +1

    Excellent.

  • @Gary-ts6dh
    @Gary-ts6dh 3 года назад +2

    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.

  • @pizzle1011
    @pizzle1011 4 года назад +1

    Very easy to follow, thanks again

  • @wisdomwisdom817
    @wisdomwisdom817 Год назад

    Awesome job thank you so much

  • @zackzarate
    @zackzarate 2 года назад

    GREAT VIDEO

  • @jimmysegovia2688
    @jimmysegovia2688 4 года назад +3

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

  • @rmeken
    @rmeken 4 года назад +1

    Great explanation it will come in handy

  • @hkhsm359
    @hkhsm359 4 года назад +2

    nice video. great knowledge. thank you for sharing.

  • @robertlongoria765
    @robertlongoria765 3 года назад

    Thamks.

  • @donnierobertson3088
    @donnierobertson3088 4 года назад +1

    Great job and video

  • @elbo530
    @elbo530 4 года назад +1

    Great video my friend!

  • @lancerudy9934
    @lancerudy9934 4 года назад +1

    Thanks for all the great videos!

  • @deffy750
    @deffy750 2 года назад

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

  • @xtremecomfort7799
    @xtremecomfort7799 4 года назад +1

    You are a The Man!!!!!

  • @tonypointer7026
    @tonypointer7026 3 года назад

    Very good video

  • @MemeKing44
    @MemeKing44 10 месяцев назад

    great vid thanks!

  • @ogyywinn6035
    @ogyywinn6035 3 года назад +1

    well explained

  • @aprendamosconreneamaya725
    @aprendamosconreneamaya725 4 года назад +1

    Thanks

  • @irishkevin4307
    @irishkevin4307 3 года назад

    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...!!

  • @Irwhodunit
    @Irwhodunit 2 года назад +23

    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.

  • @5863carlitos
    @5863carlitos 2 года назад

    outstanding!!

  • @Rick-tb4so
    @Rick-tb4so 4 года назад +1

    Great video..

  • @argenismoreno8838
    @argenismoreno8838 4 года назад +2

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

  • @manuelesquivel6153
    @manuelesquivel6153 2 года назад

    Wow yeah of course its really helpful thanks ,

  • @jimbola77
    @jimbola77 4 года назад +1

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

  • @markbarber1920
    @markbarber1920 4 года назад +1

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

  • @Shutyourjibbs
    @Shutyourjibbs 4 года назад +1

    Great video, thanks!

  • @armziusthezealot4072
    @armziusthezealot4072 3 года назад +2

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

  • @danschepperly
    @danschepperly 3 месяца назад

    pan full of water!!! thanks so much 🙌

  • @tomahawk5959
    @tomahawk5959 2 года назад

    Did you check the low frequency transmitter?

  • @Peter-fu3fm
    @Peter-fu3fm 2 года назад +1

    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!

  • @toolemanful
    @toolemanful 4 года назад

    Thank you

  • @PBS-nm1uu
    @PBS-nm1uu 4 года назад +1

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

    • @acservicetechchannel
      @acservicetechchannel  4 года назад

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

  • @cynthiafeinen2841
    @cynthiafeinen2841 Год назад

    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. 😂

  • @tribal21475
    @tribal21475 3 года назад

    2:22
    What if i dont see voltage at all
    Do I have to switch the whole board? Or the wires?

  • @dreadone6894
    @dreadone6894 3 года назад

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

  • @paulcamalin5236
    @paulcamalin5236 2 года назад

    Hi,
    Thanks for your great videos. I learned a lot from you. Will you please help me wit this issue. As I power on the furnace I get the error code 31 which is 3 short flashes followed by a long flash. Please see below for a description of the code. I know my the inducer is OK but it received not voltage and the pressure switch is also fine. Nothing happens not even any noise just the LED light. It can’t be any blockage because nothing turns on to sense that. What do you think I should check for? Thanks!
    3 1 : PRESSURE, DRAFT SAFEGUARD, AUXILIARY-LIMIT (when used), OR BLOCKED VENT SHUTOFF (when used) SWITCH DID NOT CLOSE OR REOPENED - If open longer than five minutes, inducer shuts off for 15 minutes before retry. Check for: - Proper vent sizing and condensate pitch - Inadequate Combustion air supply. or sag. - Low inducer voltage. - Vent restriction or high winds. - Disconnected or obstructed - Defective inducer motor or start capacitor. pressure tubing. - Defective pressure switch or connections. If it opens after trial for ignition period, blower will come on for 90 second recycle delay.

  • @josechavez7922
    @josechavez7922 3 года назад

    thanks you you just save me sone money

  • @union537
    @union537 2 года назад

    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.

  • @IFreshhx
    @IFreshhx 2 года назад

    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

  • @moderator5558
    @moderator5558 3 года назад

    Greetings. Great video. Thank you very much. My inducer motor was starting, running for a few seconds, and then stopping before the burners were turning on or anything else. When I checked the voltage between wires R and C, as you mention at about the 5:00 mark of you video, the infuser motor started running and stayed on, the burners came on and the furnace appears to be functioning normally. My question is, "Why?" and my concern is that, because that was so easy, it won't be the permanent fix. Do you have any suggestions as to what I may be up against if it quits?
    Thank you!!!

    • @SP-rz3tk
      @SP-rz3tk 3 года назад +1

      I had this problem this morning. Heat would not start. Testing the voltages, I noticed the wires move. Hmm. Loose screw at the "C" terminal. I tightened it down, and furnace started properly through the cycle. Check your screws, maybe one is loose?
      Thanks for the video. Very concise and clear instructions.

    • @moderator5558
      @moderator5558 3 года назад

      @@SP-rz3tk Thanks for your input. I appreciate you taking the time. This is not my problem. I have checked all those connections. I have also replaced the inducer motor. I'm becoming convinced it is the board.

    • @davidlindgren7605
      @davidlindgren7605 3 года назад

      It's not an infuser motor, but it has the crazy name of "draft inducer motor." I have no idea what that means, but it's so confusing I can understand why you didn't remember the name.

    • @moderator5558
      @moderator5558 3 года назад

      @@davidlindgren7605 You are correct.

  • @chriswebb810
    @chriswebb810 Год назад

    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

  • @druer_gsxr
    @druer_gsxr 2 года назад

    hi if the safety switches such as limit switch or rollout switch is trippes open will that stop the board from giving 120v?
    Im not getting power at the inducer motor on the board were the plug connects? thanks in advance

    • @Redtooth75
      @Redtooth75 2 года назад

      The board will still get 120 volts but will not power on the inducer or gas valve. Usually they set the blower to run continuously when that happens.

  • @sajjanlama1ify
    @sajjanlama1ify 3 года назад

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

  • @EvilJ069
    @EvilJ069 2 года назад

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

  • @bradsteeves5403
    @bradsteeves5403 Год назад

    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

  • @zekenzy6486
    @zekenzy6486 4 года назад +1

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

  • @lausy3
    @lausy3 2 года назад

    When turning on the heater on the thermostat, am I suppose to hear a clicking noise from one of the relays turning on? I am not hearing that on my control board.

  • @mandarg3243
    @mandarg3243 4 года назад +2

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

  • @katropa5664
    @katropa5664 3 года назад

    what lubricant using for fan bearing?

  • @joeydelmarsjr.646
    @joeydelmarsjr.646 4 года назад +1

    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

  • @gpsperez5193
    @gpsperez5193 3 года назад

    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

  • @juanacosta2788
    @juanacosta2788 4 года назад

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

    • @acservicetechchannel
      @acservicetechchannel  4 года назад

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