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  1. #1

    Furnace blowing black out of exhaust & smells

    I have a Quatro true blue 90 furnace that is approx 10 years old. I kept smelling gas so i called the gas provider out they came and did leak test and found that it was all good , but they found that the smell was coming from the exhaust vent and there was black stuff in pipe . I have noticed that my heat from vents doesnt feel very war and the furnace seems to run a lot . I also have used more propane then i think i should have. Now i had HVAC guy come out and he is telling me that my heat exchanger is bad and that only 4 of my burners are lighting. He is also telling me that he cant get parts and i should just put a new furnace in. I found parts online through Texas furnace . I guess my question is does this sound right and should i fix the furnace or put new one in ? Thanks for any input.

  2. #2
    Join Date
    May 2008
    Location
    Missouri
    Posts
    3,421
    Most 90% furnaces made in the last 15 years also come with lifetime heat exchanger warranties. I'd get in touch with the manufacturer and see if they recommend a local contractor as I'm thinking you're getting "sold" with the present contractor. If you can find the parts, he can find the parts so he's simply lying to you! If in fact the heat exchanger is NOT under warranty (some are shortened due to 2nd owner), then I'd simply change it out as most heat exchangers are nearly as much as the furnace. Are you on propane? If so, then make sure you are dealing with a contractor who is certified to service Propane furnaces and has experience and the proper tools to set them up!

  3. #3
    The company that made this furnace is out of business but a company named Texas Furnace has the parts . I am waiting on price. Yes im on LP .

  4. #4
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    6,959
    Did he tell you specifically what was wrong with the heat exchanger?

    Sounds like sooting problem due to ignition issues.

    We would need much more info.

  5. #5
    Join Date
    Jul 2010
    Location
    wisconsin
    Posts
    270
    Quote Originally Posted by rob1977 View Post
    The company that made this furnace is out of business but a company named Texas Furnace has the parts . I am waiting on price. Yes im on LP .
    Heat exchangers are sooted without a doubt, a combustion test would reveal high co ppm, but could read high enough to damage the sensor in the co analyzer. Weve had three sooted furnaces in the last week, all fifteen years and newer

  6. #6
    Join Date
    Jul 2000
    Location
    Northern Wisconsin
    Posts
    1,974
    Change the furnace, get new warranty. Make sure the new one is setup properly and that it's serviced every year.

    Wait till you see the price on replacement heat exchangers for you 10 year old furnace!
    Use the biggest hammer you like, pounding a square peg into a round hole does not equal a proper fit.

  7. #7
    Join Date
    Jul 2010
    Location
    nebraska
    Posts
    1,629
    A sooted up heat exchanger isn't going to be covered for a part warranty and you'll still need to fix the cause. New furnace might end up being cheaper.

  8. #8
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    No such thing as a warranty on a Consolidated brand furnace anyway, just replace it.
    If more government is the answer, then it's a really stupid question.

  9. #9
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    20,857
    Propane is a DIRTY fuel... it needs filtering before entering the furnace (a moisture trap would be a good idea).

    I agree with the others... get the new furnace; be SURE it is converted to LP, and have it serviced annually.
    GA-HVAC-Tech

    Quality work at a fair price with excellent customer service!

    Romans Ch's 5-6-7-8

    2 Chronicles 7:14

  10. #10
    Join Date
    Aug 2004
    Location
    S.E. Pa
    Posts
    6,137
    If you have soot in the vent and are smelling something, it is probably aldehydes, which means it is also producing carbon monoxide in quantity. Based on what you've told us, I'd shut it down and have it replaced ASAP. Then get yourself a low level unlisted CO monitor so you can be sure to wake up in the morning. Look for a contractor certified in carbon monoxide and combustion analysis

  11. #11
    I spoke with a few contracters . I actually spoke with the contracter that installed the furnace . He said that he installed a dozen or so of these units 15years ago . He has replaced 10 in the last few years because of the same problem . He is coming Thursday to install a new HEIL 95% eff 100k btu unit it has lifetime heat exchanger warranty and 10 year parts warranty. He actually gave me a very good price i think because the company went out of business and all , Or thats what he is telling me that he is givin me deal for. I had another contracter qoute and he was just over $$$$ higher for the same unit different brand.


    Pricing isn't allowed
    Last edited by jpsmith1cm; 02-06-2013 at 08:40 PM.

  12. #12
    Join Date
    Dec 2007
    Posts
    4,668
    Quote Originally Posted by rob1977 View Post
    he was just over $$$$ higher for the same unit different brand.
    was it the same unit or not?

    you do get what you pay for, so the lowest bid is NOT necessarily the one to go with!!
    Last edited by jpsmith1cm; 02-06-2013 at 08:40 PM. Reason: edited quote
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  13. #13
    Join Date
    Jul 2010
    Location
    wisconsin
    Posts
    270
    Quote Originally Posted by rob1977 View Post
    I spoke with a few contracters . I actually spoke with the contracter that installed the furnace . He said that he installed a dozen or so of these units 15years ago . He has replaced 10 in the last few years because of the same problem . He is coming Thursday to install a new HEIL 95% eff 100k btu unit it has lifetime heat exchanger warranty and 10 year parts warranty. He actually gave me a very good price i think because the company went out of business and all , Or thats what he is telling me that he is givin me deal for. I had another contracter qoute and he was just over $$$$ higher for the same unit different brand.


    Pricing isn't allowed
    You had better have one big house to warrant a 100,000 btuhr furnace. We joke up here that you should have to get a permit to buy a funace over 80,000 btuhr. Didthe contractor perform a heat calculation?

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