Electronic Flame Sensor troubleshooting for a furnace

[ALMIGHTYSUPERSTAR]

mission accomplished!! Thanks for the info!!

[tonimunko]

Fantastic video aid! Got mine fixed and prolly saved a small fortune by not calling a technician. Thanks very much!

[JerHomie123]

Thanks! Problem solved!!

[guaiguaikaishao]

It really works!Thx a lot.

[archm62]

Thank you! Good explanation of the symptoms. Good explanation of the cause. Video very clear as well. Nicely done. This fixed the problem. There wasn't' much residue on the thermocouple. It was only really in two spots but was enough to cause problems. Total cost of this job was 99 cents for a sheet of fine grit emery cloth. Total time for the job 5 minutes. Now that was one satisfying home repair!

[mfhanderson]

Thank you so much, woke at at 530 on my day off with a 67 degree house and a cold 2 year old son. found your video and fixed my furnace in about 4 minutes! Thanks so much!!!!!

[hartmurmur]

@mfhanderson 67°? That's warmer than what we keep the house at normally!

[mernst81]

Thank you so much for this video. It worked like a charm.

[icejunki]

These words don't accurately reflect my gratitude but your video was spot on. Though it's a simple fix I thought it was something else based on other info I read. The KISS (Keep It Simple Stupid) pneumonic worked. Start from step one and work deeper. Cleaning the sensor took 5 minutes to clean after I spent a week worrying, thinking the worst, waiting to get paid to buy a board. I should have started by cleaning the sensor. THANK YOU, THANK YOU!!! I hope good Karma floods your life.

[derredmax]

Thank you thank you. You are awesome. Max

[dominicanochicago]

Thank you very much for this video! It was 21 degrees a couple days ago and I was wondering what could be done in which I would not have to call someone to fix a simple problem (I thought). Well, after watching the video it was simple and thanks again Mr. Hardwarehelper for your instructions and time!

[cwa318]

Worked great!! Thanks a lot!!

[TheBubbaknight]

thanks for saving me some money man!! works great after fallowing your advice!

[mchl1956]

It's Christmas Eve morning and we woke uo to a VERY cold house.  Absolutely could not find a technician to come make the repair, Being just a LITTLE bit handy, I went to youtube and found this video. Your video showed me how to make the repair.You made Christmas at my house a WHOLE lot warmer. THANK YOU, THANK YOU!!!

[niki80]

Thank you so much, you've saved my family on a very cold night. God bless you and your family for sharing you knowledge.

[InspiredEarful]

You've touched my family in a huge way! God bless you and yours!

[EZtopdogZT]

omg thank you sooooooooo much, It work! THIS IS REALLY HELPFUL

[jsanto10]

Thanks, this video saved me 400 bucks, a tech asked me to read the status light and stated it was going to be 400 to go and fix the problem. I looked up flame sensor, saw this video, followed each step, and I now have heat.

Thanks.

[azvirtualtours]

Awesome! Worked great. Thanks a lot!!!

[ejfrecruiter]

This was perfect and worked like a charm!!!! Plus is saved me A LOT of money to have someone come out on the weekend to look at this issue. Now my family will be earn tonight!

[ukebomber]

Thanks brother, you saved the day. I owe you a beer!

[taylorNasty]

d16gotboost your an idiot cause this dude has saved many of people hundreds of dollars and you aint done shit thanks again hardwarehelper

[dopesmokinghippy]

I love you man!!! you just saved my ass. woke up today to 4am to a nice warm 6 degrees of heat. couldn't find a reapir man to come today. did what you showed and it worked right away!!!

YOU ARE THE MAN!

[gomernoodle]

Thank you very much, that was the problem. SA-WEEET!

[MrKingtye07]

Thanks Man. I have solved my problem.

[safetydude100]

Worked like a charm.. thanks for that..

[chemistryguy]

Thank you. Thank you.  Thank you.

[breyercollector24]

Thanks you! The service man was literally at the door when I finished cleaning the flame sensor. He stayed 5 minutes to verify it was working and did not charge me for the service call.

[mcguirkscamaro]

A big Thank You to helping me take care of this issue myself, and avoiding a service tech call and the resulting $150 charge. ANYONE can do this. Even if you had to buy the $10 worth of required tools and steel wool it will save you money down the line.

[citizen6185]

Thanks to your video I saved $75 on a tech coming to my home and god knows much more in labor from being gouged. Great video, it solved my problem.

[synthetica8472]

Thank you! My furnace was cutting off the flame after a few seconds. Cleaning the flame sensor did the trick.

[carljencematand]

You are so awesome, my house is heating up thanx to you!

[skitony]

Thanks so much!!!!!!

[mrsirsouth]

Thanks uploader! My house was at a whopping 58º This morning. 

[djdostackz]

After weeks of sometimey heat, i decided to google it and I find this.... THANKS!!!

[MrMleigh56]

This is exactly what my Goodman Furnace has been doing, and it was the flame sensor (thermocouple). Thanks for posting.

[rich4205]

I wish I had watched this video before calling a service company to replace the flame sensor to the tune of $299.

[grinosmr]

$ 400 please

[bigbusiness87]

due worked great thanks alot! saved me some money. such a quick fix

[hypnospastic]

My Lennox is doing the same thing as this furnace. Going to the hardware store today to give this a shot. Awesomely informative video. Thank you so much! Hopefully you've saved me loads of money!!

[bwelsh8544]

very helpful, thank you very much. This worked exactly as you showed.

[BasicGrafix]

Dude thank you SOO much! mine started doin this 3days ago, was gonna wait a week to have someone come out and look at it. Saved me money! Thank you!

[sabo123321]

Thanks bud!!

[ulhakyab]

You saved me and my family, for the last 3 days I don't have heat. Thanks a lot for the video. I will definitely share this lifesaving tips on Facebook.

[djthul]

Saved me a service call, thank you!

[JMSBNY1980]

i was having the same problem and found this video. works like a charm!!! Thanks for posting this!

[mrstrictlygm]

Wow, I have this exact problem on my furnace. It comes on, but shuts off right away. I cleaned off this flame sensor today and it seams to be working properly again. I do plumbing for a living and don't know a whole lot about HVAC, but I kind of suspected it to be a problem with a sensor of some kind, not letting the burner stay on long enough. Thanks for the video, very informative.

[debonair08]

Like many who have already posted on this video, I want to thank you for this information. My furnace was doing the same exact thing so I did exactly what you said and the heat is working fine now. Not only did you save me money, you got my wife off my back (Priceless) !!!

[JenniferRaeCMU]

Thank you So much!!! I've been looking everywhere for info on where it was located. You are a life saver

[XxLeo05xX]

yes this video helped me so much even tho i was not able to remove the flame sensor i did get a part of my finger nail on it to scrape off the bottom portion of it and my flame stayed on and my rooms slowly very slowly heated up. ur and awesome man lol thanks alot man

[Malfuryion]

Thank you for this post! Saved me from a really expensive weekend visit from someone who would have done this in 3 minutes like I did.

[ozzman10187]

Thank you sir, just fixed mine and save myself some money. No more sitting in a 45 degree house dreading what a furnace repair guys gonna charge.

[phongtran0606]

Thanks a lot.

[cipota3]

ok. i am chicago and its negative 4 right now. the heater still was not kicking in. and guess what. went and found hardwarehelper...found the video....saved me god knows how much. depends on who would of came here and screwed me. thank you SO SO SO SO MUCH!!...we are now back at 70 degrees at the house

[lsgalicia]

Thanks for the info it worked like a champ. Someone wrote that it is better to use a dollar bill to clean it. It was to late by the time I saw it. It it is better to use a dollar bill, then it would be great if you could add something about it in your video.

[majikdragon]

Thanks for the video! you just fixed my furnace when it's 10 degrees outside here in MI. Keep posting, your help is appreciated.

[dwsstlouis]

Using an abrasive surface like sandpaper or emory cloth will mar the surface and encourage debri to adhere to the flame sensor (not an "electronic thermocouple") in the future, necessitating their early replacement. Use a dollar bill instead - just the right surface quality to clean without marring or grooving. Flame sensors use flame rectification to prove the flame and need to be able to carry as little as 1 micro amp dc. Clean with a dollar bill once each heating season.

[1manairband]

Just wanted to thank you. It's about 10 below zero and my furnace started doing this exact thing. I did what you said and she's working now. You are a life saver.

[kegg2282]

This video saved me from a possibly expensive service call on a cold February Missouri night.

Note: I have an American Standard Freedom 80 VS. The ThermoCoupler is in a slightly different place than the one in this video. You have to look from the bottom up, into the area where the flames flames normally are. I just gave it a quick sand with 3M 60-grit sand paper. I worked right away.

Thank you, Sir.

[oneprouddaddy]

Great video saved me (no handyman) hundreds of dollars

[insidesportsgeek]

Thanks for your vid hardwarehelper. Saved us tonight from the Midwest blizzard here in Chicago :) .

[VJHillS]

Thank you

[clandrestino]

Hello.

first , thanks for the video it helped a lot.

I did what the video shows like 2 months ago and my unit worked fine.

But lately I've been having the same problem and sometimes I have to clean the sensor up to 3 times at day, I even have to wake up in the middle of the night to fix it. do I need another sensor or I'm having another problem?

[alcano]

thank you so much... you are my hero... my family thanks you too...

[zalllon]

I wish I saw this earlier, had to read someone's blog describing. So much easier to follow it from a vid. I went through this with mine about an hour before watching this. Hopefully this saves people money.

[protovos]

Excellent and quick solution to my problem. Thanks a lot. I've got a Rheem furnace with an L-shape flame sensor, which had the same problem as yours (buildup; barely noticeable though). What I find interesting here is that sanding the flame sensor solved what seemed to be a problem with the thermostat too; in fact, I originally believed it was the thermostat that was not working properly. Your video gave the solution to the only real problem here: a dirty sensor. Thanks again.

[eadthem]

this flame sensor uses AC voltage or high dc voltage to detect a flame if the flame is present it will cause current to flow from the needle because the flame is conductive in 1 direction(like a diode).

[MrBillQuick]

Thanks a bunch, your trick worked like a charm!

[toothgrisle]

My fingers have finally thawed enough to type you this note of sincere gratitude. After two days of messing with the 'not staying on' problem I found your video...... ten minutes later the furnace was roaring properly, the whole family is warm, and I look like a hero. Thank you! DITTO FROM ME!! Many Thanks!

[wbgfsdert]

I use to have this all the time. I take a scrubby just sand it back and forth a few time, and the problem goes away. No need to take the whole thing off. Just reach in the back and sand it acorss the flame sensor, and you'll be just fine.

[thalmat1]

hello the funace has a hard time starting it will turn on after truning the power off and on like 3 or 4 times . it will start and some times stay on for like 5 mins or run all the way to 78 . i have replace the flame sensor and still having the same issue .it is am older model like 14 yr old thank you for the help

[ndhmashfan]

Thanks for the video! It seems to have worked on my frigidaire. Thanks again!

[milkandhoney1214]

Thank you so much for posting this flame sensor video on you tube. Even though we did not have the same exact furnace, we do have a newer furnace. Everything shown in the video was to the T. I did what you showed and the problem is fixed. Thank God and may God bless you. :)

[njnuvyctxuiuhiughuft]

My fingers have finally thawed enough to type you this note of sincere gratitude. After two days of messing with the 'not staying on' problem I found your video...... ten minutes later the furnace was roaring properly, the whole family is warm, and I look like a hero. Thank you!

[paxamime]

Thanks! That did the trick!

[DLoyKnowles]

The best thing to use to clean the flame sense rod is a 3M Scotch-Brite pad. The silicia on the emory cloth will eventyall melt into glass and become an insulator, defeating the purpose of cleaning. Also the heat that is hitting the flame sense rod is not what causes the flame sense. It is the fact that the flame creats a path for the electrical current to flow to ground, completeing the circuit.

[blackstone777]

Thanks for the info! Had a few problems with my 7-year old furnace starting. The sensor was cleaned last year by a HVAC tech, but I don't think he did a good job. Cleaned it up myself with a sanding bit on my drill. Got it shiny and put it back in. Now it works like a charm! Saved me about $75!

[tickattack]

Thanks mickichito7. It ended up being the gas valve which was putting out too much. The service guy showed me the pressure reading he was getting before and after the new valve was installed and it has been working fine ever since. It took about two hours to get to that point. Switches were checked and are okay by the way. At first he suspected it was the control board. Good thing it wasn't because a Lennox control board is about $900.

[tickattack]

That could be the problem I am having. My furnace stays on much longer than the one in the video before it cuts out. It never reaches the demand temperature though. The way I get it to go back on is to turn the thermostat off and then on again.

Will try this to see if it works. Thanks.

[mickichito7]

@tickattack probably if your furnace runs for a while but thermostat doesn't satisfied, might not be the flame sensor, take on consideration the high limit switch, could be going off in high limit or any rollout switch...but try and see what happen.

[thebianches]

Thanks for the info...you are a huge help! Thank You

[amazingtech]

I have trane XL80, it's flashing twice. I looked on the bottom i see the ignighter lite up and the burner where the ignighter is flame up but the rest of the burners dont flame up. it does this about three times then the fan kicks on and cold air comes out. can some one help me Thanks

[mickichito7]

@amazingtech did u check the burners might be dirty, also need to check gas pressure..or recirculating fumes if it would be a 90%..

[wargasmn]

@amazingtech you might not be getting any gas out of the valve, quick way to test without a meter is stick a screwdriver on top of the vavle and hold it there while the ignitor is glowing. The power to the valve pretty much is closed by a magnet, Thus if you feel magnetism you at least know its getting power

[turfguy87]

thanks for the info!!!

[pmotyka]

Thanks for posting this, it helped me troubleshoot what was wrong with my furnace and saved me a costly visit from the HVAC repair person. I cleaned my flame sensor and now the house is toasty. Thanks!

[metasenimola]

Thank you Hardwarehelper for this  great video

God Bless You

[carsickv]

Thank you so much for your post!! Our furnace stopped working this morning and it is cold!! It is also Sunday and close to Christmas so this would have put a damper on our holiday. Your video was was easy to understand and within minutes my furnace was working again. my husband is also impressed that I did it myself!!

Have a wonderful holiday

[cocampojr]

lots of thanks for this post. just finished cleaning the flame sensor on my furnace and it is now working. still keeping my fingers crossed. thanks again. now to get some rest, it's 4:30 am already.

[dacoutch]

Hardwarehelper ,you just saved me all kinds of time and money. this was exactly my problem. i love youtube.

[jayhawkbirds22]

Great troubleshooting video.......No offense to the hard working men and women of heating and cooling.........but this helped....I was just about to make a service call.....I thought I would try You Tube first...well I'm glad I did........so mr. hardwarehelper....you now have a friend in Missouri......thanks

[sebadelax10]

Thank you for your video, God Bless You, now my son will be warm,

[999Atwood]

I cleaned mine & it worked fine for a while, now it's doing it again so I guess I'll have to order a new one somewhere. At least I know now what it is for sure. Exact symptoms I'm having.

[videoisback]

Thank God for this video! If it wasn't for this video my family would be cold tonight. I called the 24 hour service line and I'm sure they would have charged me an arm and a leg for such a SIMPLE fix! Thank you SOOOOO much for this video!!!!!!!!!!!

[jimmy2642]

great video you helped me fix mine except cleaning did not help so i replaced it and it works great.

[levimariah]

watch the furnace as it is trying to run and figure out when it its sequence that it doesnt do what its supposed to - inducer starts to vent the heat exchanger, the inducer is proven via pressure switch, then ignitor glows, then gas valve opens, flame initiates then is proven via flame sensor,heat exchanger heats up, blower comes in via time or temp, unit runs, t-stat satisfies, kicks out gas valve, blower times out/quits,waits for next call 4 heat, where it stops is where the problem lies

[rockandroll1968]

hey mine does the same thing except the flames dont come on at all(only the coil) can anybody help me what could be wrong with it?

[cplbrookes]

cheers I live in Canada its minus 20 tonight and thats what was the problem, you kept my family warm and saved me an emergency callout for a local furnance guy save me a couple hundred dollars cheers

[ozguramac]

I was going crazy trying to find where the flame sensor was. Thank you!

[ollie3030]

Thank you !!! Thank you!!! I am at home with a newborn baby and we were freezing here!! You video solved my problem and now my baby, wife, and I wont have to stay in a hotel tonight!

[clandrestino]

I was freezing my ass off bro.....!! thanks to this very accurate  video I'm warm and cozy and the best did not cost me a penny thanks a lot.

[gbreitsma]

This video is awsome!!! I fixed the furnace myself while my husband is away. Thanks so much for not making me spend a ton of money to get a furnace person to come to my house at 10pm on a saturday night.

[02Lobosolitario]

Thanks, i just save a lot of money fixing it by myself. This is a wonderfull video.

my calefactor is not like this, but the problem was the same, i had to buy the thermocuple but now is working perfect.

Thanks again.

[nthdesign]

Thank you! This video described the exact solution to my furnace's problem. Specifically, I have a York furnace that was giving me the "Ignition Lockout Due to Retries" error code. I followed the simple steps in this video to clean the flame sensor, and my family has heat again!

[thinner355rfr]

I wasn't getting flam on on the last burner where the EFS was so I took off the flute and cleaned it out.While I had it out I cleaned the EFS.put it back together and It fired right up.Thanks for your video it really opened my eyes to finding the problem

Milton and remember saftey first and turn off the gas and have plenty of ventilation.

D I Y. rules

[KNIGHT19B]

I actually have the same problem, not sure if it's my Hot surface ignitor or the Flame sensor, acting up........ but i will be trying this approach on Thursday night! Thx u for th help and info!

[joelstanleysmith]

@brashrafi1 your control board normally will flash diagnostic codes ...like 3 flashes for a pressure switch problem, or 4 flashes for a flame signal problem, ect...normally that can point you in the right direction. Sorry im 2 months late. i just found these vids haha

[joelstanleysmith]

"GlowCoil" is acutally a "HSI" ( Hot surface ignitor ) :)

[FlashBackTrax]

Thanks , this vid solved my problem that started in march, I let it go because it was at the end of the season and it would give me some time to look around to see what the problem was before calling in a service tech at the cost of 80 bucks just for walking through the door. THANKS, works great my system a carrier weather maker is 13 years old and this is the very 1st tome i had any issues, I have a spare surface ignitor on hand because i understand they go out all the time.

[genbeau]

Don't use sand paper or emery cloth ,use a carbon file for proper flame rectification.

[daisuke1592]

thank u very much good video

[RealitShifter]

This did the trick for me. Thank you for sharing!

[johnmac1221]

I have a Trane XE80 with the same symptoms. I just removed, cleaned, and reinstalled the flame sensor and it's working like a champ. Thank you for posting this video. You saved me several hours, and probably a couple hundred bucks!!!

[sens2win]

WOW... Been without heat all day...  I tried the Breaker...tested the electrical.... Finally gave up and agreed to call a service tech in the morning when i came across your VID!!!!! fixed in 20 mins because my flame sensor is located on the right on the bottom and was hard as hell to replace that 1cm screw!!! who cares tho you saved me $150+ on a service call!!! Warm in here now!!! Thanks!!!

[boilerbacker31]

you the man! What a simple fix...I had this replaced last winter and it cost me about $250 during one of the coldest days of the year. thanks so much...I love heat!

[yafmil]

Hi,

Great video Sir, I must congratulate you for your very clear & simple fix, which saved me about 250C$. I remember I had similar problem I called a technician & he changed the igniter & the labour was 80C$.

Thanks again

[73roberto]

My heater was shutting down after a few minutes of operation. Followed the steps in this video & it works great! Thanks for posting!

[adrianaverdusco]

good video BUT YOU SHOULD NOT TOUCH THE FLAME SENSOR AFTER YOU HAVE CLEAN IT THE OIL FROM YOUR FINGERS WILL CAUSE YOU PROBLEMS LATER

[tstatech]

Good video. But this is not a thermocouple it is a flame sensor and heating it has nothing to do with how it works. It actually conducts a small amount of electrical current through the flame and to ground. The flame is the conductor. Really cool when you think about it. It can be measured by placing a multimeter on micro amps and connected in series. The minimum required micro amps is usually listed on the control board.

[seadogjz]

Great vid. Just solve my own furnace problem by following suit. Solute

[nyajthoj10]

Thanks a million! This worked awesome! I was pulling my hair out ready to call for service.

[TheJackal7000]

Thanks! You saved me some money for someone else to come out and fix it.

[taboogie01]

EXCELLENT VIDEO!!! Didn't think it was gonna work for me but it did!! Thank you very much!

[PatMan0183]

Very helpful video. The lack of light makes it a little difficult to see inside the furnace. A common mistake in video is lack of light.

Overall, good video, good "narration"(loud/clear voice). My brother and sister-in-law have a 4 month old baby and their furnace wont continue to run. Since we live in Michigan, it needs to get fixed right away. Saving them a couple hundred dollars by doing this repair myself is the best bonus.

Thank you....

[evora09]

I love youtube!!!! more than a week with the same problem, see this video, worked on it for 5 minutes and IT WORKS!!!! thank you man!!!!

[rudeboylll]

Thank u so much for the video i have never worked on a furnace in my life. This video saved the day and my wallet God Bless U.

[PutSome5tankOnIt]

Nice video. Good work. Manufacturers actually recommend 'polishing' the flame sensor with steel wool instead of emery cloth/sand paper. The flame sensor doesn't sense heat. It passes electrical current to ground. The circuit board measures DC voltage because the flame cannot carry AC current.

Again, nice video.

[ps411com]

Awesome... solved my problem as well. So simple. Knowledge is power!  Thank U

[spillpop]

Thanks dude! I also have a Lennox Elite. Emory cloth for the win!

[ddk80]

Thank you sir! I had the same issue on my Lennox Elite Series Furnace, purchased in 2002. I used a Scotch Brite Heavy Scouring pad to remove the build up, and now the furnace works like new.

[jonnywood09]

Man that was an outstanding video. I just did what u said and bam my heat is working. Thanks soooooooooooooo much u r the man.

[kpmlbell]

This video was great!!! I just had this same problem with my furnace, and after watching this video I was able to get some heat. Thank you so much.

[jbone5376]

Wow. what an easy thing to fix. I put in a new thermostat and it work all day but the furnace stopped working about 2 in the morning and it got down to 8 degrees outside and 65 in the house . i have 2 kids and i stand up to 5 messing with the thermostat . found this and it was the flame sensor. Thank you soooo much. Less then 5 min to do. and yes U R the MAN!!!!!!!!!

[enat2580]

i have a lennox elite furnace it is only 4 years old. my furnace was doing the exact same as yours. i have 2 lights that are flashing code saying that it is Main line polarity reversed. switch line and neutral. i pulled the thermal couple and sanded it, and now my furnace is working awesome all though the 2 code lights are still flashing.. Thanks for advice you save me alot of money..

[louieescobar73]

Thank you!...you solved the problem.

You saved me time and money!

Again thank you sooooo muccchhhh!

[48loupaltron]

I have been using 600 grade auto body finish paper to clean off the 2-6 micron thick oxidation from the flame sensor. I've been doing this for 18 years once a year to my Byrant furnace.

[kraabe2001]

Thank you SO much! I paid 150.00 a year ago for this and remembered something about a dusty sensor. I went to google, then YouTube, found you, watched the video and my hubby & I fixed the issue in about 15-20 min. It fired up and is on now. We were freezing our asses off. Worked like a charm. Pretty damn cold in NY right now. You are seriously the man! :-) THANK YOU!!!!!! Happy Holidays!

[krob08]

Thanks For The Advice Because Mine Was The Same Way And Is Really Old And I Figured It Out & It Was The Thermocouple And I Found Build Up Insulating The Tip Of The Thermocouple!

[mikeysworld1]

Thanks Alot......You save the Day....Same exact proplem I had....Love You...

[funkyk51]

Thank you very much for making this video!

[darkgurl314]

@

D3MoNiacK,I COULDN'T HAVE SAID IT BETTER...U ARE THE MAN!!!!!!!THIS WK FOR ME ALSO

[D3MoNiacK]

Thanks a lot for your help. 3am freezing my ass. Try to reset the furnace for about 1 hour nothing worked. Looked your video, 5 minutes after the furnace is running like a new ! The house is warm and I can go back to bed without spending a penny ! You are the man !

[IzzyXgallY]

man you just save me from freezing my ass off... and probably couple of hundred bucks from a tech ripoff. again thank you from the bottom of my heart...

SPREAD WISDOM, SPREAD LOVE, SPREAD FREEDOM...

[scoopy00]

Huge help thanks!

[mxchamps]

sweet.  thanks

[elflick]

worked like a charm...u the man

[jkporcupine]

This looks like the exact issue I'm having.

Thanks for posting this.

[danklimuk]

Thanks for the video! Being new to furnaces, I thought the coil was the sensor, so I had cleaned that with no results. Watched you video to find out that my sensor is actually situated BELOW the first burner.  Pulled it out, cleaned it (it looked clean already), and re-installed. My house is now warm and cozy once again!!

[77ramila]

I spent a long time trying to figure it out. I knew about the flame sensor cleaning - I didn't know where it was so I was cleaning the coil all this time - yea call me dumb. Thank you very much for pointing me in the right direction - you were very helpful.

[baneberry7]

Thanks

You pointed me right to the problem and it worked, my York furnace is turning on and staying on here in cold Minnesota!!!

[bangdiggity]

thats exactly what mine was doing. guess what i'm gonna clean off tonight? oh and this happen once before and they simply replaced it and charged me 200 bucks!

[daddiox33]

flame rod or flame sensor not a thermocouple.

[hardwarehelper]

Hi, you're right, it's a flame sensor. We've gotten into the habit of calling it a flame detection thermocouple or electronic thermocouple.

[1Ronin187]

@hardwarehelper I have a Trane furnace and when I turned it on, the igniter will glow and the injet burner will fired up but after it went off, it will not start again even though the inducer fan, blower, and igniter is working fine. Does it have anything to do what flame sensor? Please help!

[hardwarehelper]

@1Ronin187 Hi, did you try sanding the flame sensor? That would be the 1st step.

[VIHOLD]

Thank you very much )))

[ripazamora]

i have the same problem an i think that might work..thank for showing your video..it's very helpfull to others.