Furnace blowing black out of exhaust & smells
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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
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    Missouri
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    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
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    Mar 2004
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    Illinois
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    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
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    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
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    [QUOTE=tiger man;1515934 Weve had three sooted furnaces in the last week, all fifteen years and newer[/QUOTE]

    is this uncommon??

    @wahoo..LOL! at holding up fingers to size units. I've had this 'shown' to me several times.
    not a loac calc or sizing by any standard other than bs.

    best of luck OP.
    Last edited by energy_rater_La; 02-07-2013 at 11:40 AM. Reason: punctuation
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  7. #7
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    wisconsin
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    Quote Originally Posted by energy_rater_La View Post
    is this uncommon??

    @wahoo..LOL! at holding up fingers to size units. I've had this 'shown' to me several times.
    not a loac calc or sizing by any standard other than bs.

    best of luck OP.
    No its not uncommon at all on carrier and payne and bryant, on lp, ive condemned over a hundred heat exchanger due to soot in the last three years

  8. #8
    Join Date
    Jul 2000
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    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.

  9. #9
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    Jul 2010
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    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.

  10. #10
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    Aug 2004
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    North Richland Hills, Texas
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    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.

  11. #11
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    Sep 2005
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    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

  12. #12
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    Oct 2009
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    Quote Originally Posted by ga-hvac-tech View Post
    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.
    LPG is dirty? How you figure that?

  13. #13
    Join Date
    Sep 2005
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    Quote Originally Posted by MicahWes View Post
    LPG is dirty? How you figure that?
    NG furnaces need less maintenance... and LP furnaces need more cleaning.

    Also LP has lots more moisture issues.
    GA-HVAC-Tech

    Quality work at a fair price with excellent customer service!

    Romans Ch's 5-6-7-8

    2 Chronicles 7:14

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