Furnace Burners not Lighting - Easy Repair 

Just finished. My burner plate was a slightly different design (individual burner plate sections for each burner) but the interconnecting gas porting seam was still the same. Pulled it apart, cleaned them out and viola, back in business. Thanks again for you video highlighting the exact problem and solution.

I am very thankful for your video. Not only was it informative and to the point, but that you used specific wording for the title that makes it searchable. Others try to use catchy, or flashy titles that only serve to serve as eye candy for their subscribers and does NOTHING for non-subscribers. I not only thank you but I did the thumbs up and subscribed !

Literally just watched this video and fixed my problem!!! Saved me an $85 service charge

This is exactly whats going on with my furnace. Thank you for the simple and informative video.

Thank you! Cleaned it out and I have every chamber firing again. System is running smoothly again. I owe you a beer(s)

Mr. Flannel Guy, you just got a new subscriber, me. Thanks a million. I did exactly as you instructed. I removed the screws with a small socket wrench for the tight fit, cleaned it with a wire brush, knocked off on the garage floor to dislodge the loose debris, blew it out with some air from my lungs and reinstalled. My right and middle burners were ignited but my left was not and this caused it to turn off after just a few seconds. Now all three burners are firing. My downstairs is warm again. Thanks again.

Thank you so much!!! Clear and concise and saved me a repair bill. THANKS!!!!

A most excellent step-by-step repair video. 🥳 Thank you.

Thank you sir! Used this today... saved me a service call. I appreciate you sharing your knowledge!

Bro, you helped me so much. Thank you!!!! just got mine working again. Cleaned it up and opened the channel a little. Thanks so much!!!!

Great, clear and concise video. You saved me some $$. After I cleaned the channel (which did not look dirty), I took a soft steal wool and cleaned the flame sensor. I also used some canned air to clear everything. Everything works great now thanks to you! thank you!

Thank you! Couldn't get the burner out and had to fashion a cleaning device out of a wire coat hanger to reach back and drag across the edge. It worked! Couldn't have done it without you.

Thank you so much for sharing symptoms and cure and explaining how to clean the crud from the edge of the burner plate crossover grooves to allow the the other flames to ignite. I used a soft bronze wire brush. I pried open the grooves a little with a flat head screwdriver - maybe a bad idea -and better to replace the plate and get a clean new one - it is just a $25 part ? I pried them open a little - seemed to be ok. Also -- on my furnace there is brittle Silicon carbide heated igniter ( rather than your spark igniter) right in front of the plate. Best to REMOVE that first before trying to remove the plate ( but do not touch the black ceramic part with finger grease or will later crack from hotspot). I didn't do this - and bumped and smashed the ceramic while removing the burner plate. $20 heated igniter part but 3 day wait over a weekend in the freezing cold. Got a replacement one - installed it AFTER putting the burner plate back first - and the cleaned plate worked first time on all 5 flames - previously just 2 and then failed and shut down. 23year old Rheem Criterion 2 furnace. Previously replaced the controller board after 20 yrs ($130), then blower motor ($200) after 21 yrs. HVAC people refused to fix it both times - first claimed they could not get the parts - and then when I gave them the part numbers - they said it was policy never to fix 20yr or older systems - that they would "be liable" when something else went ... such nonsense ... they said had to get a new system - $10K+ and should replace the AC at the same time too ! Likely would have said the same this time too. I was worried it might be the gas valve ($160) with possible low pressure and would need to buy a manometer to diagnose that and to set up the new gas valve safely - but cleaning out the crud fixed it straight away. Can still get all the parts for these systems so in theory could keep them going for many more years. Anyway - thanks again.

First real cold night of the winter, glad I found your video so I don't have to freeze tonight.

Thank you so much. I thought it was the valve. Spent $120 and still had the same issue. Used a $3 hook pick I have in the garage and fixed the issue in 5 minutes without even removing the manifold 🤦🏽‍♂️

Thank you when my furnace would light only two burners would light and when the other to lit it lit the gas from the two unlit with a loud bang .my burners are of a different design and only took compressed are to clear the dust out .this video saved me a service call

Hi Mr. Flannel Guy. Hey man, thank you very much for this video. I was able to figure out and fix the issue I was having with my old furnace. Such a valuable information, it saved me a few bucks. Really appreciated

Nice video. More accustomed to seeing individual in shot burners. Those must be removed one at a time and cleaned. I always clean my burners at the start of the heating season along with flame sensor rod. No issues if you follow simple diy steps like these. Thanks.

Very straight forward, clear and easy to understand, keep it up bud

Thank you flannel guy. You just save me hundreds. I cleaned with a simple wire brush and toothbrush. Took me a bit to get the screws out but is worked like a charm. $$$

Super Fix! Thank you soooooooooo much.System up and running thanks to you and saved a ton of money

This worked for me. Thanks so much for saving me money!

Thanks for the knowledge, staying warm now.

Thanks from Australia! I tried your cleaning tip but had to create a tool to do the cleaning as I would have had to do some considerable dismantling to do the job. The tool was a narrow piece of copper sheet with the end bent to almost flat against itself. Scraped it up and down the flame path. Unfortunately in my case that wasn't the problem, it turned out to be a partially blocked jet. Jiggling a bit of wire up the jets solved the problem. Saved the wire and the 'flame path' cleaner inside the unit for future use. Thank you, I learned something and that lead me to the solution.

WOW and thank you great knowledge to pass on works like a million bucks and it was not so hard .

Great video. I cleaned everything. And I'm definitely getting every burner to light. I cleaned the flame sensor. But I'm still not getting blower to turn on. I'm lost now

It cost me 500 dollars to find out the furnace guy didn`t know anything . After he changed the gas valve and ignitor I started having trouble again and since I didn`t have any money left I tried starting it with a lighter and the nossel pointing at the ingnitor was plugged.and that was 500 dollars wasted. . Lesson learned. you tube people know better and are a lot cheaper.

The heat kit nozzle is like an ordinary butterfly kitchen stove, and the color of the fire is perfect, blue, of course very hot, my friend

Awesome fix! That saved a ton of money right there! Thanks for sharing this my friend!

Thank you, my furnace is now working again.

This helped me get mine going. Ty.

Fantastic informative video sir thank you 👍🏼👍🏼👍🏼👍🏼👍🏼

wow i so excited ! as soon as i seen the video i new that would fix it , fired right up .....thanks very helpful...

my friends, thank you for sharing the tutorial

Very helpful, but I'd like to add something else, I took it out and it was clean, then using an screwdriver I opened the gap between the burners and it started working good, thanks the video

Thank you for this video. Fixed my problem.

This is why you should service your furnace before every heating season starts. The service addresses the issue by cleaning it thoroughly. The furnace may look clean but there could be a clog from combustion debris or corrosion.

I have to leave a comment.. Thank you for the info it’s very helpful

Thanks for the video! Easy fix with you video

It worked thank you so much I'm now subscribed

Great video...Thanks a million !!!

Excellent cleaning job training. 3/14/2022

What if none are firing? Furnace is 2 years old and doesn’t look like it’s dirty or anything. I don’t think it’s the burners but maybe like the igniter ? I have a small black on/off switch on top of the burners. Should I power cycle that maybe?

Thanks, this video helped me! 👍

Very interesting knowledge to have.

You are getting alike and subscribe for that.I didn’t know about the channel thank you.

Good video but I could not get screw off. So I took some Dust-off instant remover sprayed it into the holes. Turned it on and it started right up.

My greeting from iraq well done

Thanks for the video! Fixed my problem!

Wondering if I might pick your brain a bit. We've got a propane furnace here and it seems to function well besides the fact that I know I need to seal ductwork. Nearly every time it does it's start up sequence, there's a metallic clunk from the unit. I haven't actually checked into it much but from seeing this video I'm mildly under the impression that my burners may need to be cleaned, that I may be missing a small bracket, or that I have a loose screw somewhere. We don't have any history of maintenance for this unit, just that it is a replacement unit that was installed within the last 5 years. We thought it was delayed ignition at first but it isn't an explosion sound and it isn't violent. Just a mild little clunk.

So...is there supposed to be cotton looking stuff inside the big holes the flames go into?.... Mine has three burner holes and two have aome sort of cotton looking stuff in the back of them...seems like its a hazard...currently my heater just does a "click" and then nothing when i turn it on...

Thank you it helped me 🎉

Good video thanks for sharing

Very helpful. That worked for me too!! Thank you!!

I have a similar furnace. Do you ever clean out the tubes the flame is shooting into? Mine have a grayish buildup inside and I was thinking about running a circular brush down them while holding a vacuum at the opening. It seems like this buildup would hinder the ability of the flames to heat the tubes efficiently.

Well done video and clearly explained.

good video mate, good video... mine is American Standard gas boiler, from the 70's, yesterday I noticed that pilot stays on, but boilers under 70 degree dont burn... any idea? thanks

Thank you sir you saved me $$

thanks great video thanks for the help

You didn't mention the cost of the hospital visit for your thumb, that sheet metal can play dirty some times..

You should loosen up and get a tripod for your camera. An instructive video though A like and subscibe for you.

I have a pilot light and I cleaned the igniter and the burners will not kick in so why not??

My furnace has been igniting the first burner and failing to start the other two. However, it does intermittently succeed. I've cleaned the flame sensor, the burners and cleared out any debris in the burner box. I took the burners out and blew out the fuel path between them. They all appeared clean to start with. The furnace is only two years old. Actually, I was able to pass some card stock through the fuel path. There are three individual burners, not one piece. I wondered about exhaust. The exhaust pipe (PVC) is the Diversitech CVENT. So I don't know how to see inside the exterior pipe. The centre pipe looked clear, but I could see water at the very bottom. Is that normal? A 'P' trap maybe? There is nothing covering the centre pipe. Should there be? After all the cleaning and reassembly now the furnace is short cycling. Perhaps just replacing the high limit switch and flame sensor is the next step. However, the limit switch continuity test passes. With that in mind my furnace is using propane so are there different switches and sensors that I should replace them with? Thanks so much for your hard work in posting these videos.

Hey! Nice video! So I’m not getting any flame does that mean my valve is bad? Thanks

Thanks this helped me fix mine

Amazing. Thanks.

My furnace has this problem. I have taken the burner plate out and it is clean as a whistle. Spotless. The issue is intermittent. Maybe one time out of ten only one or two burners light and then the gas stops. Help!

Thank you!

From the look of all that corrosion you must live in a humid climate.

Had that exact problem thank you

Thank you

Would i have to open my burner box to get to that? That seems kinda risky.

modine garage furnace the burner does not come on instantly and when it do it makes explosion what could be problem

THANK YOU

A lot of times when the furnace is dormant, I’ve had spiders an their webs block the orifice. Matt

Why didnt the flame sensor shut the unit down when the last burner was not lit?

Found the issue with mine was a covered Flue pipe outside

Are the small yellow spurts in the flame normal?

What if it doesn't light the first one?

Thanks for the very good info, mine just done this, hope it solves the problem, I'll let you know, 12/12/21, time 11.oo a.m

Does anyone know what causes this to occur ? Or is it just Rust/SUDD build up over time?

i get spark but none of them fires up? i cleaned the grate the sensor and the igniter

Hey Flannel Guy, my oil furnace has a small boom or blow back at the end of the heat cycle and I can't find any info on it. Most blow back are at the beginning of the heat......anyone out there who has had this issue and or can help I would appreciate it! THANKS.

just replace it.. if its starting to rot out its on the way out.. i mean if its a sunday after hours get it going but order a new one.

👍

What if the ignitor is on but none of the burners are lighting

mine has 2 coils a hot and a neutral.

My Dad was having furnace trouble the repair man told him "you need a whole new furnace don't start this one up as it may blow up"

My damn heat keeps going off and the house drops to the 60s..help

3 bucks worth of stainless steel used by the manufacturer would be nice.

I would replace that flex line with steel pipe.

Mira Mala Mia, yo no queria comentar en su video. A mi no me importa donde tu vives. ESO era para un amigo de P.R

Mever seen a flexable gas line used on a furnace I don't believe that go code.

What about that Michigan heat*ng guy that sees rust and says toss out the furnace, even when its from 2009?

It's weird that he does home repair videos but he can't find a wire brush. I can tell my grandkids over the phone where my wire brushes are.

Don't touch gas if you're not qualified. It's illegal in UK.

Carb cleaner.

I wish you lived by us..We need a Good Honest guy to look at our 40 Year old Airco Furnace.. We don't want to replace it..They don't make the New ones like this Airco

thank you!