Furnace Carbon Monoxide Test
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- Опубликовано: 13 мар 2020
- Furnace carbon monoxide test, how to check the carbon monoxide levels that your furnace is producing. In this video I go over how to check what levels of carbon monoxide your furnace is producing, how to use a combustion analyzer, where and how to drill a hole in the vent or exhaust pipe, what the different readings mean, and what the readings should approximately be. The analyzer used in this video was the UEi C161. (link below) I tried to keep it as simple as I could without diving into too many of the technical aspects as this half an hour video would have become a couple hour long video in a hurry…
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#wordofadvicetv #furnace #heating #hvac #airconditioner #airconditioning
Great video, the "cone" is actually meant to be screwed into the exhaust vent. If you drill your hole bigger it threads in. Then you use the set screw on the cone to to hold the test probe "square" in the hole. Dont know how important it is or isnt to keep it as close to the center and perpendicular to the pipe but that cone really helps achieve that.
Great tutorials👍👍simple yet very informative.. no techno babble👌
i know this has nothing to do with this video, i just want to thank you soooooooooooo much i recently found your channel cause my AC was messing up and you help me diagnose the problem. thank you sir you are a life saver.
Sarah, I am happy that my videos helped you get the AC fixed!! You're very welcome! I appreciate you coming back and leaving a comment on my newest video to make sure I don't miss it ;) God bless and stay cool!
I bought this analyzer because of you. I like it.
Congrats Jay on picking up the UEI sponsorship! Good move on their part. I’ve purchased a couple UEI meters in the past based on the input and advice given in your previous videos.
Thanks Holt! I was always a fan of UEi products so I was only happy to partner with them! Good to hear that I was able to influence your meter selections. It sounds like you were happy with your choice. :)
Word of Advice TV I hope they compensate you well / fairly given what seems to be a loyal following you earned. I’ll continue buying their products (even though I rarely use them) and have recommended them to friends due to their overall cost / benefit value. Thanks for the excellent and trusted recommendations!
@Holt Russell I can't go into details but they do treat me fair. Thank you for the concern and I appreciate your support! It's nice to see familiar names consistently in the comments. :)
Make uei rich 🤑 this co2 one is 700$ lmfao
I think the C161 is affordable. Especially when you add up the cost of 10 years of calibration and 10 year warranty with the + plan. @@jz7054
That was exactly what I needed. Thanks for the video!
Great video jay! Always great quality learning 👍
Thank you Boiler Man! Glad you enjoyed the video :)
Nice touch with the recorded values on a piece of tape.
You're about the best you're very details in what you do
Thanks for the great video. Really informative
Excellent video! High value content...thank you
You're welcome! Glad to hear that! Thank you for watching and leaving a comment.
Thank you for all information in this video very nice analyzer you get what you pay for.
Glad to hear you found it useful! Yes, the analyzer is pretty nice and it's actually quite a bit cheaper than many of the Testo and Bacharach analyzers.
The yoke of the egg is white.....all right smarty pants...you got me. Lol
Great video. Co is without a doubt the silent killer and we need to know as technicians how to get to the sweet spot when replacing gas valves, setting gas pressure and adjusting the burners. Please do a video showing use of your co analyzer and gas pressure gauge or meter, how to adjust the burner air vents and gas pressure for the cleanest burn after setting the burner gas pressure to spec. That's the video I never see anyone do and to me would be the most important step in getting low co levels in the flue. We need a part two. Thanks. Your videos are super. Take care. Jpol
Lol I used that egg question on my family and they had a whole debate going on whether it is "are" or "is". They were pretty disappointed when I told them it's actually yellow haha. Thank you for the video idea! I hesitate to make a video like that though... Adjusting gas pressure incorrectly could cause the CO to go up real high, damage the furnace, and in the worst case scenario bring harm to the residents. This is probably why there are barely any videos where someone actually shows how to adjust the gas pressure on a gas valve. It's almost a liability to post something like that in the off case that the information will be mis-used.
@@WordofAdviceTV I really wish you would reconsider this. If you show yourself checking gas pressures and adjusting too the spec stamped on the unit, you've done no wrong. What if someone who didn't know what to do from there had misadjusted the furnace, many could be out of adjustment right now! Simply telling what to look for in the flame and on a certified meter to correct the problem may actually be saving the lives of many who are slowly getting poisoned to death. Showing the correct way and what to look for, with a verbal disclaimer that you shouldn't touch a furnace if your not a licensed contractor and if they suspect a problem to call a contractor, leaves you making more videos. Thanks and think about it. I can find out how to make a nuclear bomb on you tube, which is educational, but I wouldn't make one. Same with adjusting a burner for correct air, gas and co. Educational but I wouldn't. I'd call a contractor. Take care. Jpol.
@J Pol That is a solid rebuttal :) You do make a good point. I will definitely reconsider and perhaps will post a video on how to adjust gas pressures within the next few months. We'll see.. Thank you for taking the time to explain your point of view!
Thanks for the great videos!
Great tutorial as always. Thanks
Thank you! Glad you liked the video!
very educative. Thank you regards
Very good illustration.
Thank you!
I already know how to do combustion analysis testing, just watching the video because i watch all of your videos, theyre great. COa is for "CO air free" im not sure how many people really care about it, i dont stress about it just make sure its under 100ppm
Thank you for watching! :) And I appreciate you explaining what COa is! I don't usually pay much attention to CO air free either so the first thing that came to my mind was CO alarm.
To get BPI ( Building Performance Institute) building analyst certification you have to test everything air free since I believe it’s technically the most accurate since the reading isn’t diluted by ambient air. That’s my understanding at least.
@@torreslover456 Thank you for the additional info! Will need to do some reading up on this topic then.
I only ever look at air free CO. It's the undiluted CO number, hence it's more accurate.
Recently got a testo 310 and I really like it. Thats a nicer UEI than I could get when I bought my testo. Uei sells some really good diagnostic equipment, i use the dl389 true rms meter almost every day. Co-a stands for ambient co. Its telling you what the co in the structure is in comparison to what you find in the flue. Its useful for narrowing down where the location of the CO is coming from. Also works well for checking CO in the supply air plenum
Yeah! Testo makes some good analyzers too! Thank you for the additional information! Good to know
@Justin credible Thank you for sharing that Justin! Definitely good to know and watch out for.
These UEi CA are getting a bad reputation for unreliability, think you’re better of with the Testo.
Ricky H
Excellent videos! They were done so well it inspired me (not service tech) to replace my 30 yr old 80% bryant furnace with a 96% goodman. I've finally completed and now I need to perform a furnace combustion analysis. You use the uei analyzer. Is it cost effective for a home owner to purchase one to perform a yearly test and do you have your recalibrated yearly? Keep the videos coming!
Great tutorial... Thanks
Thanks Jay . Your the best.
Can't you check high efficiency furnaces at the outside wall where it exhausts and avoid drilling through the 636 pipe ?
love the info will see if I can buy that analyzer! I will subscribe to your channel
Amazing information 🙂
Bro! You’re awesome!
Thank you so much for video!!!
Thanks! Great stuff!!
high co from a clogged secondary i remove the hose from the meter. i feel it works quicker.
Also i record the x air readings, they are required for some issues
Thanks, Jay, good vid, in Canada they prefer that you don't drill the pvc tubing but install a test tee and plug.
Good to know, thank you for pointing that out! That is rarely ever done in our parts :) Perhaps with time, that will be common practice here as well..
just go outside and measure the CO level between the house or in the back yard.
Great job!Go Magnetic Man!
Haha thanks, magnets are the way to go!
Great video Jay!!!! Can you use the analyzer on a gas package unit? If so how would you check it? Or if not what can be used?
Another great quality video instant thumbs up 👍 thank you from the west coast Bay Area 707
Thank you John! I appreciate you watching and leaving a comment, along with a insta-thumbs up! :)
Hi, thanks for the video. I have one question: why do CO levels go sky high in exhaust flue as a result of cracked heat exchanger or blocked secondary? I do understand why a cracked heat exchanger would cause CO levels to go up in the supply air.
More back pressure prevents the fire from burning hotter, causing less CO2 and more CO
Why is a high CO level bad in the exhaust pipe that goes into the chimney? If I want to know if my heat exchanger is bad or not, couldn’t I just measure CO level at the supply air register in the house???
You did great.
quick question can they check the the co level with out drilling a hove or can they tested by putting it on a vent they told me it was 1777pp and but i didnt see the test it or make any hole at all
Do you have a video of the uei c163 and how to use the test the hear exchanger?
👍👍👍 excellent video
Thank you Harry!
Hey Jay, another great video👍 I’m not sure how the regulations are where you live but here in Canada we are not allowed to drill the System 636 pvc vent piping, it’s actually in the installers manual, it states that “Drilling holes in piping is not permitted”
We have to use test tees here for testing combustion. 👍
What is a "test tee"
CPVC in Canada.
@@pullmytrigger1A vent section shaped like a T ..... It is installed in line of the exhaust near the furnace test point .
Just like you would have a T in copper plumbing pipe .
The diff is that a test T for HVAC flu venting ( with CPVC piping ) has a threaded bung on the T section to be able to remove for access in order to test flu gases and insert a test probe .
CPVC is now code. It replaced PVC. If there is a home fire you don't generate the harmful gases with CPVC that PVC does when burned.. it may also have a higher heat rating.
During installation All cuts are made with a specific cutter , and All cuts must be chamfered with a CPVC chamfering tool so that the CPVC cement does not get pushed out of the joint when fitting piping together during installation .
Jay .... I would like to add ...
I understand you want to ensure a good seal with the foil tape.
However , applying pressure pushing the tape in the hole like that weakens the tape on the edges of the bore of the hole.
Instead , I would ensure All the tape has zero bubbles and press it down so it is completely smooth . Don't press the tape in the hole .
Hope this helps .
Hey man, I really appreciate all your videos and have been non stop trying to learn more and research etc, I just picked up the exact same analyzer you have and will be doing a combustion test tomorrow on a 80% efficient furnace. I've watched other videos saying a high O2 level means a cracked heat exchanger but they don't get into detail what that "high" level is. Where is the best place to find appropriate o2 levels and co2 levels? I know 50+ppm co is a concern. again thanks
Can you make a video to set up the aux functions. I just got this meter and the instructions are terrible. Thanks
Just had this done on our 22 year old Trane XE 80. Levels read 476ppm and climbing.
CO alarm units should alarm at 400 ppm
hey guy ! I have a question, can this analyzer be use on a comercial boiler ? I have a small boiler 80 psi thank you.
Hello, whats the age of this furnace? Did you have to get it replaced at some point or is it still kicking heat in the house good?
Very good video
Thank you!
Hi J hope you have been well my brother! I'm adding a hard start to my 3 ton Carrier unit. Just 2 connectors, my question is do I have to discharge the capacitor that is already in my unit? Or can i just make sure all power is off, including disconnect and just plug the connectors in? Thank you and I'm proud of your growth!
Thank you David! Hope you and family are doing good during this virus season.. I would discharge the capacitor after the power is off, just to be safe.
We have our furnace cleaned and inspected every year and I've never seen them do this. Do I have to ask them or should this be part of their furnace check up?
Wow a great instruction video. Very detail and good camera angle. A million times better than the UEI company video. I can’t believe they made that worst video ever.
Hi Jay I did research and found an very interesting video about combustion analyzer and I would like to know if I can post the link in the coment or send you by some way.?
Jay- Does your link to the UEi C161 come with a probe? If not can you provide a link or model # to the probe you’re using? Great channel- Thank you!
To be honest I am not 100% sure. I would think it does as it is part of the kit but it would be best to contact the Amazon seller and ask them directly.
Graet! is there a cheap meter you trust I can use it to measure CO
If the CO went down in the 2nd stage why doesn’t the efficiency go up slightly? I thought these were correlated? Thanks for all the amazing videos. Also thanks for sharing Bens channel. I didn’t know it existed and I’ve already watched some super helpful videos over there.
The CO reading does not really affect the efficiency unless it's a high number. Sorry, I don't recall the exact formula for efficiency calculation though. Yeah, Ben has some good videos! I watched them in the past too.
Hey Jay. With the risks you describe about drilling into PVC in the wrong spot why not just avoid drilling all together and just test the CO where the vent terminated on the side of the house if it’s accessible?
Thanks
@@torreslover456 You can do that as well. Sometimes it is just more convenient to do it inside the house. Plus many manufacturers recommend taking the reading closer to the unit. (i don't think it makes much of a difference where you take the reading, at least from what I have seen)
If it’s a super close run and your outside anyways to zero out ur analyzer then taking it outside is no different. Also you can inspect for obstruction. Plus a clogged secondary heat exchanger will smell like gas extremely outside to the point you lose your breath
Jay, very useful video. As it happens, my furnace has all Type B vents all the way to the furnace. Can I take the readings on the roof at the end of the vent ?
Yes, taking it on the roof would be fine too. 👍
Thanks for the video. What is the normal level of flue CO? Mine is showing 42 ppm. The tech who did annual maintenance said normal in most houses is between 8 to 15ppm. Thanks
You're welcome! "Normal levels" vary from company to company but here is what most gas companies go by: Anything lower than 50ppm in the flue is fine. 50-200ppm - burners probably need some cleaning, gas pressure may need to be adjusted, and check exhaust. Anything well over 200 is a red tag/shut down immediately - high chance of a cracked heat exchanger.
OOa is carbon monoxide air free which is where you get the true carbon monoxide as the code in Canada refers to carbon monoxide air free
Gracias senor.
De nada Amigo :)
How do you perform a combustion test when their stainless steel flue likes zvent
Just an idea, would you be able to make a detailed video on how to convert an ECM motor to a PSC motor? I’ve seen it done once but I can’t remember for the life of me.
I've done PSC to ECM but never tried doing it the other way around. Sounds interesting :) Thank you for the video idea!
Word of Advice TV No problem, your videos have helped me out a ton
Expert
What is the normal co on Wh,HB and HF?
I'm using this equipment but for some reason I cannot get any efficiency readings..?
You can see the 100F exhaust in HE furnace vs lower 80% 400F which is BTU's lost up the chimney but captured in the HE thus lower exhaust temp which creates condensation. BTW adding a 4" fresh air input to a 80% or lower without one will improve efficiency. Putting it right near the combustion area where there's flame, on outside of unit is all. That amount of cold air coming into the home is bad and putting near the combustion chamber helps. No modification to furnace at all.
Thank you for the additional information and suggestions AD! Much appreciated!
I don't understand what you're saying. Is it bad to put in a 4" inch pipe or not?
Hi thanks for the videos, they are helping a lot , i am a new immigrant and never seen a furnace in my life , doing hvac training from canada, Do you have video on furnace inspection and also troubleshooting ( for help in daily job life )
I am happy to know that my videos have been helping you out! I have many videos on furnace troubleshooting and a few that are on general maintenance. They can all be found in my furnace playlist: ruclips.net/video/dPXM8TFMQGw/видео.html
lavish madiya, Welcome to the US 😊
@@WordofAdviceTV thanks for the reply sir
thanks for the video bro, one quick question."is it possible.the ac disconnect switch.would.be installed within the unit itself, instead of mounting on the wall nearby?"
Anything is possible :) People do amazing things haha. But by code, the disconnect should not be installed within the unit itself. I have never seen a disconnect within a condenser unit.
@@WordofAdviceTV then, will it be possible the unit without disconnected switch, solely use.the breaker box
@bing chen Yes, that is possible although it would not be following code guidelines. This scenario I have seen before.
@@WordofAdviceTV thanks for the quick respond.me. like ur videos, great job bro
How does it calculate efficiency?
I don't recommend using metal tape on PVC.I drill and tap it with a 1/4" pipe tap and plug hole with a 1/4" pvc plug.
Thank you for the suggestion Michael! I appreciate you watching and commenting!
Why don't you recommend using metal tape on PVC?
Hi, there.... My question is not this video related but I am really frustrated. My furnace is about 15 year old and running just fine until recently it starts and shuts off. I watched your video so I suspect maybe the sensor was dirty. I cleaned it and put it back. the issue is still there. So, I thought maybe I need to replace the old sensor. I bought a brand new one and changed the old one. the issue is still there..... I am scratching my head......what other reasons could be?
Have you watched my flame sensor troubleshooting video? I talk about a lot more than just the flame sensor in that video so perhaps that will help you find the culprit: ruclips.net/video/-QKHz1Mv9Ew/видео.html
what's the price for uei161 ?
And do u have any video on venting size calculation and relays
Unfortunately I do not have videos on that topic yet.
@@WordofAdviceTV ok thanks, hoping to learn from u on this topic as well.
Can you use this to check the CO in a duct or supply register?
Yes you can. But there should always be 0ppm of CO in the supply duct.
Little confused, CO level of less than 50ppm is good but you mentioned 100 and 200ppm needs investigation.
Can anyone explain?
Jay, you’re playing with our minds again, lol. Nice meter you got there.
But then, you always have the best stuff.
This testing makes me wonder what reading you would get on an oil burning furnace. Yikes 😱
Haha thanks Mr. Classic! To be honest, I have never checked CO on an oil burning furnace but I am sure the readings would be quite a bit different.
Word of Advice TV,
A man tried to sell me a coffin today,
I told him, that’s the last thing I need.
@@classic287 Lol, nice one! :) Thank you
Word of Advice TV,
A wife tells her husband to go to the
store and get a gallon of milk, and if
they have avocados, get 6.
The husband comes home with 6 gallons of milk. The wife asks, why did you get 6 gallons of milk? The husband says, they had avocados...
Hahaha I had to reread it but that's a good one! :)
How many parts per million is allowable on a furnace supply duct with respect to carbon monoxide? How many ppm might point to a cracked heat exchanger?
Well actually there should be 0PPM in the supply duct. The purpose of the heat exchanger is to separate the combustion gases from the supply air. So if there is any CO in the supply, that heat exchanger for sure has a crack in it.
Thanks for the information. If there’s a small crack, would you allow any ppm - or would you red tag it immediately?
@Gary Chez Any cracks, regardless, small or big equate to a compromised heat exchanger. I would red tag it immediately. If it is a small crack, there is a good chance that the furnace could have served for another 10 years easy... (many furnaces running out there with cracked heat exchangers) BUT a small crack has the potential to split and become a big crack and if the furnace CO levels are high, this could mean death to the home residents. So even though most cracks are "harmless", they can very quickly become fatal. Of course, we don't take any chances and red tag units even with small cracks. I hope that explanation cleared things up for you instead of making it more confusing :)
COa for ambient air levels?
Gas valve troubleshooting video please!!
Thank you for the video suggestion! :) I'll see what I can do.
@@WordofAdviceTV good videos bro. Thanks for sharing you knowledge.
I had some rental furnaces inspected recently. I arrived late at the first house but was told it passed. I asked why the detector on the wall showed a reading of 16. He then “retested” the furnace by sticking the tester directly above the flames and showed me it was 35, then started increasing quickly to 100. He said it failed and I needed to replace it. I thought it was odd he put the tester right on top of the flame. Is this normal? He then said it didn’t pass. Moved on to house 2, he also did not pass this house and said it showed a reading of 4. Recommended I fix for $1500 or replace. Now I’m suspicious. Neither house has ever set off a co2 detector.
Is it normal to put the tester there?? I would think there would be measurable co2 directly above a flame.
He put it on top of the flame? I've never seen anybody do that. He sounds a little sketchy, I would call the company back and ask them to send a different/more experienced tech otherwise call another company for a second opinion. As for the detector on the wall, there should not be any carbon monoxide in the house. If it really is 16, then the heat exchanger likely has a crack in it and that furnace really does need to be replaced. That's why I am suggesting to get it double checked..
You do this testing on all furnaces you work on and is there a charge for this type of testing?
No, I would only do a combustion analysis on a furnace inspection or tune-up. Or if I have reason to believe that the CO may be high. (if there is evidence of soot, flame rollout switch is tripped, pressure switch tripping, burner box getting hot, burner flames flutter when blower motor comes on, the exhaust smells weird, etc). But I know that some companies do require their techs to do a combustion analysis on every single furnace call they go to.
The CO test comes with the PM check. That's the main reason why we check the furnace.
Why is that it will be okay if you have 50 ppm in flue ?
Can this test be done outside on the flue vent exhaust?
Yes. 👍
HVAC sounds very interesting experience.
It is an interesting career for sure :)
@@WordofAdviceTV That's something I'm into on doing when I get out of school.
@@guitarplayert5185 That's a great choice! I am sure you won't regret it. Good luck!
GuitarplayerT It’s a great field to get into. It’s a career that will never be outsourced or replaced by a robot. You will never go hungry and will enjoy a comfortable lifestyle.
I’ve been into quite a few houses where I’ve seen holes drilled into b vent. Always try to seal it up and write on the vent not to use for co analysis readings.
You only clean the furnace once CO reaches 200 ppm?
I clean the burners regardless, takes but a few minutes.
But every company works different.
Good video!
Holy crap I watched the whole video and was impressed with this device. Went to click the amazon link and it’s almost $500!?!?? Good grief man we’re heating technicians. We’re not rich. 😂😂
The one i have is $1000+ lol
Jason Burgos Holy crap lol
@Brandon Bombard Haha yeah, analyzers are expensive! Although the one in this video is actually a pretty low price as far as analyzers go. They can get up to $3,000
$500 for a analyzer I feel like I wouldn’t trust it lol my Testo was $1500
when I put my thermostat on a temperature "hold", the furnace running fine... but when I put it on "schedule" it still starts and shuts off... what is going on?... thank you in advance!
👍
Thank you for watching and leaving a comment :)
Never drill into pvc on high efficiency units!
Is COa air free?
Yes! That's what it is! Thank you. I was doubting that it's actually the alarm but it was the first thing that came to my head.
Carry professional
You butchered the hell out of Fahrenheit.lol had to do a double take that one hey.
Hahaha I know!! I was even impressed myself but just kept filming lol
As good as Trade School.
Air free
Can I rent a combustion analyzer?
I don't think so. I have never heard of that. But for the price of renting it, I am thinking you could probably just get a furnace inspection done. You would need to confirm when scheduling the appointment that a combustion analysis is part of the check though.
I have a bunch of rentals through and want to inspect them all - I could probably buy an analyzer for the price of having them all inspected
@@WordofAdviceTV
Hello
WHY DOES MY FURNACE WHEN I TURN IT ON ALWAYS MAKE MY HEAD FELL NUMB LIKE A PRESURE THING ONLY ME KNOW ONE ELSE IN HOUSE?????????
COA : is Carbon monoxide air free , and it should not go beyond 400 PPMs
I don't have a comment but I have a question. In Exactly what state or province are you licensed to be servicing or altering gas fire equipment Combustion rates or efficiencies???? if you're doing this in your own home and it's a single dwelling that's fine! that's you taking your own families life into your hands, if this is you posing as a qualified technician for the sake of RUclips! If anyone dies or is harmed we'll make sure you take for responsibility!
Judging from your grammar, he's probably more qualified than you. Do you think he would be making these videos if he didn't go to school for it or went through some type of apprenticeship? I'm sure he has a license to practice HVAC in his home state. Thanks for being a watchdog.
Why wouldnt you just go take a reading at the end of the pipe outside the house ? What if little timmy(customers kid) decides to go down to the furnace room and rip off that tape ? I would never reccomend to drill a hole in a pvc flue pipe. Most Inducer motors also have a port where you can take readings as well. Just my opinion , I have never seen anyone do this , but if you feel it is safe then it's good to know other ways to take readings especially if it terminates through the roof. Love your content though man.
Really? Here in Minnesota that is common practice and I see drilled holes everywhere. Taking a reading outside is an option as well but most manufacturers recommend taking a reading closer to the furnace as far as I know. Thank you for the suggestions though! Much appreciated!
Little timmy can do a lot worse things than just pull of some tape...