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  1. #1
    Join Date
    Aug 2012
    Location
    Portland, Or
    Posts
    289
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    Help with Coleman manufactured home gas furnace

    Gentleman

    I need help with a manufactured home gas furnace. I don't see to many. Attached pics. System lights, but flame just kind of floats. Stays lit, fan pops on but flames just floats, and no real heat comes out of registers. I checked gas pressure its of 6.5" and 3.5" wc coming out. It's got a deflector that flame is supposed to hit in heat exchanger. Cold air out of registers cause not enough of a flame. Heat exchanger ok, turned fan on and off flame didn't change. I think it's just a single office on burner. Not enough flame to do anything. Anyone familiar with this Coleman furnace.Name:  image.jpg
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  2. #2
    Join Date
    Aug 2012
    Location
    Portland, Or
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    289
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    Thread Starter
    Direct vent, and I opened up system and added air where gas valve mounts. No change. Natural gas. What's the brass fitting with blue rubber on it?

  3. #3
    Join Date
    Mar 2012
    Location
    North Vernon, Indiana
    Posts
    118
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    Spider in orfice

  4. Likes kamersoutdoor liked this post
  5. #4
    Join Date
    Feb 2007
    Location
    Fremont, Indiana
    Posts
    3,275
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    Quote Originally Posted by Brown Tech View Post
    Spider in orfice
    This
    Member of the "Work Exchange Program"
    "Will work for knowledge"

    "Everyone is a genius. But if you judge a fish on its ability to climb a tree, it will live its whole life believing that it is stupid"
    A Einstein

  6. #5
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    7,183
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    X2 on spider since gas pressure is correct.
    AOP Rules: Rules For Equipment Owners.

    Free online load calculator: http://www.loadcalc.net/


    There = not here. Their = possessive pronoun. They're = they are
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    Questions should end with a question mark "?" Statements end with a period "."

  7. #6
    Join Date
    Aug 2012
    Location
    Portland, Or
    Posts
    289
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    Thread Starter
    Your probably right. Thanks

  8. Likes kdean1 liked this post
  9. #7
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    11,620
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    Quote Originally Posted by Iceman_pdx View Post
    I need help with a manufactured home gas furnace.
    I emailed you the service manual in case you want to review them.
    Instead of learning the tricks of the trade, learn the trade.

  10. #8
    Join Date
    Jan 2005
    Location
    West Central Illinois
    Posts
    65
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    x3 on spider or spider web in orifice.

  11. #9
    Join Date
    Apr 2011
    Location
    Cayuga, In
    Posts
    78
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    Just had same thing little while ago. It was a spider and web in orfice, same furnace.

  12. #10
    Join Date
    Feb 2004
    Posts
    2,846
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    Spider. Me too. Found many times.

  13. #11
    Join Date
    Dec 2015
    Posts
    3
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    Yep a spider will do it. Also if you don't know what the brass fitting with the blue coating is you probably shouldn't be working on it.

  14. #12
    Join Date
    Aug 2012
    Location
    Portland, Or
    Posts
    289
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    Thread Starter
    YES it was a spider!

    LDD we don't see many manufactured house gas furnaces out here. 99% of all manufactured house units are heat pump systems. First time I've seen this gas valve. I just saw a blue cap and didn't look at it. A little different looking than my regular GV. I just hopped on here asking a question. So thanks for the tip dude. Pressure regulator

    Just got back to job, customer was out of town for holidays and they had a fireplace till I got back. Late night call Xmas eve and I hate when I'm in a hurry and if I can't get back to job at least I can hop on HVAC-TALK till I return. Thanks guys and yes it was a spider and a nest in orfice. Dumbass here always appreciate the help from you guys

  15. #13
    Join Date
    Dec 2015
    Posts
    3
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    Iceman glad you got it working that's whats important. The brass fitting with the blue coating is the gas connection line it is pretty common on most equipment. I will say however it is usually yellow, I would check that one and make sure it as an AGA or UL rating for gas use.

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