HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I am trying to figure out why I am having a gh CO level at

Customer Question
I am trying to figure...
I am trying to figure out why I am having a high CO level at the bottom area surrounding a Keepright furnace model N9MSB1002114A1. A couple of things to keep in minde I don't have the intake vent going out. Is there a possibility that CO is coming out of there. The intake pressure that I measured yesterday was minus .89. Checked CO in exhaust it was not zero but not high to about 8ppm. Question is how do I know if I have a crack in the heat exchanger
Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 2 hours by:
10/17/2015
HVAC Technician: Tim H., HVAC Professional replied 2 years ago
Tim H.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3,971
Experience: Experienced in all aspects of HVAC, both residential and commercial.
Verified

Hi, I'm Tim and I'm an HVAC expert here to help answer your question(s). Please provide all the information I ask for since I'm not onsite. At the end of our dialog you will be asked to rate my service, but please wait until then and all your question(s) have been answered satisfactorily. Thanks for your business!

I understand you are trying to determine if your heat exchanger is cracked. This can be done in different ways. But if you watch the burners when they light, do they shoot straight into the chambers? And do they continue to do that when the blower (fan) comes on?

Ask Your Own HVAC Question
Customer reply replied 2 years ago
I am a contractor myself and looking for second opinion . Yes the flames still shoot inside. This is a propane furnace. There is some yellowish orange at the tips of flame. Did a CO test at exhaust pipe it was hi. What I am trying to find out does this indicate a crack or a blockage. The furnace is in a CRAWEL space,and god knows what happen during summer. I was also surprise that my biggest reading was around floor area. Keep in mind that I didn't take the intake vent outside for different reasons. Comparing to last years results my CO was high, my O2 about the same my exes air was lower
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

If the heat exchanger was cracked, the flame would tend to "lick around" and not shoot straight into chambers. A reading of 8PPM in the exhaust would not concern me too much. There must be over 50 PPM for me to even start thinking about examining heat exchanger. That small amount could even be caused by gas pressure set to high.

Ask Your Own HVAC Question
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

It is usually not a good idea to draw intake air from the area around the furnace as you probably know. It must be fresh outside air.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
The amout of CO was in the hundreds . I am still trying to debate if mice made there home in the heat exchanger during summer or I indeed have a cracked heat exchanger. All was well last winter so for this to happen sun deny in fall makes me a sispecion that critters have gone in . How I prove to customer or myself is what I am having problems with. As you know one will be under warranty and the other customer will need to pay for.
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

OK, I was just going by your original question where you said you checked for CO in the exhaust and got 8 PPM.

Ask Your Own HVAC Question
HVAC Technician: Tim H., HVAC Professional replied 2 years ago

The best test for a defective heat exchanger is high CO (over 50 PPM) as read in the exhaust of the unit. Other signs are flame licking out and not shooting straight into the chambers and obvious signs of sooting.

Let me know if you require further help. Otherwise, good luck! Thanks for using Just Answer and please don't forget to rate my service as that's how experts get paid (thanks in advance for any bonus left). Otherwise experts work at their own time and expense. Feel free to post back with any additional questions.

Ask Your Own HVAC Question
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,938
6,938 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

Phil is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

6,938 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
I have a Centurion 2 not working with the flashing indicator
I have a Centurion 2 not working with the green flashing indicator 4 time. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Collector flue box gets extremely hot to touch. It's a
Collector flue box gets extremely hot to touch JA: Just to clarify, what type of fireplace is this? Customer: It's a furnace JA: Do you plan on doing the work yourself? Customer: Yes JA: Anything else… read more
Rick
Rick
Supervisor
22,874 satisfied customers
58MVP080 model got the heat exchanger issue. I have tech
Hi Pearl,58MVP080 model got the heat exchanger issue … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Need a heat exchanger for model GIN 80bu-1000 14B-3A; ser. #
need a heat exchanger for model GIN 80bu-1000 14B-3A; ser. # 1607K 03798 … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
In 2003, we had a new high-end Carrier Infinity Weathermaker
In 2003, we had a new high-end Carrier Infinity Weathermaker furnace installed - Model 58MVP-100-20 (run on propane). 8 years later, in 2011 - while still under warranty (parts and labor) the main hea… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Is it unsafe to have a cracked heat exchange on your
Is it unsafe to have a cracked heat exchange on your furnace? … read more
Rick
Rick
Supervisor
22,874 satisfied customers
I need a heat exchanger kit for a weil-mclain ultra 105, no
i need a heat exchanger kit for a weil-mclain ultra 105 … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
How do I check heat exchanger for blockage. Today. Sounds
how do I check heat exchanger for blockage JA: I'll do all I can to help. How long have you been dealing with this? Customer: today JA: Do you plan on doing the work yourself? Customer: yes JA: Anythi… read more
Rick
Rick
Supervisor
22,874 satisfied customers
When were stainless steel heat exchangers required for
When were stainless steel heat exchangers required for residential usage and/or what HVAC company was the first to provide them. And are they as effective as touted.… read more
D.E. Anderson
D.E. Anderson
Industrial Refrigeration Service Manager
200 satisfied customers
Funky smell coming from heat exchanger outside...... repair
funky smell coming from heat exchanger outside...... repair guy said the gas not m ixing with the air properly..true? said probably just clogged … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Heat exchanger is a month old and heat stopped working.
Heat exchanger is a month old and heat stopped working. Three lights are blinking saying it is a limit or rollout switch … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
I have a property with a Keeprite heat exchanger installed.
I have a property with a Keeprite heat exchanger installed. I believe the filter is clogged but I don't know where it's located. The model is PGF018K040E … read more
Phil
Phil
Mechanical Engineer
6,938 satisfied customers
The condensation water leaks from heat exchanger near the
The condensation water leaks from heat exchanger near the filter and comes on the ground tray. There is no blockage of any sort. What needs to be done for auxiliary condensation tray if it is cracked.… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
How can I clean the inside of the heat exchanger on my
how can I clean the inside of the heat exchanger on my furnace? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My carrier heating heat exchanger is plugged. I understand
My carrier heating heat exchanger is plugged. I understand it is civered under a recall action. if bI purchase a new systeem 59mn7a080-20 what price drduction do I receive? … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
How much time should be allowed to change a heat exchanger
How much time should be allowed to change a heat exchanger for a 48tjf016 series 580ba and 2 men?… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
I have Yorx High efficiency tubular heat exchanger, im not
Hi, my name is***** have Yorx High efficiency tubular heat exchanger, im not sure wich model though GY9S , GM9S, or GF9S. There is water leaking from the white PVC pipes, can I just cut them out and r… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
I was looking into a trane tud060 heat exchanger and noticed
I was looking into a trane tud060 heat exchanger and noticed a buildup of white powder at one of the factory seams and need to know what is causing this. I attached a pic. Thanks… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x