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  1. #1
    Join Date
    Dec 2004
    Posts
    21
    Dear Friends,

    I have Amana 80% efficient gas furnace. I have condensation problem in b-vent pipe. I hired a pro and he found out that the furnace was short cycling. But, he did not exactly find out reasons for short cycling. So, he reduced the gas inlet pressure and it helped a bit with short cycling.

    After some time, I hired another guy and he found out the problem with pressure switch which is causing the short cycling. He replaced the pressure switch and it completely eliminated the short cycling. But, I still have condensation problem.

    My question is what is the impact of low gas inlet pressure? Since the first pro reduced the gas inlet pressure, my furnace is still running with low gas pressure. I forgot to ask the second pro to increase the gas pressure.

    Do you think low gas inlet pressure might be responsible for condendation problem?

    Please, help me.

    THank you.


    [Edited by sanrishi on 12-05-2005 at 01:42 PM]

  2. #2
    Join Date
    Dec 2004
    Posts
    21
    can someone help me?

  3. #3
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,708
    heater underfiring could cause the problem. have gas pressure tested.

  4. #4
    Join Date
    Dec 2004
    Posts
    21
    Originally posted by t527ed
    heater underfiring could cause the problem. have gas pressure tested.
    thank you. should both inlet pressure & manifold pressure be checked?

    If manifold pressure is correct, does it mean that the inlet pressure is okay?


  5. #5
    Join Date
    Apr 2002
    Posts
    11,808
    You are a scratched record sanrishi, you seem to ask the same question over and over again. Maybe fat eddy can answer it for you.

    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  6. #6
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,923
    Yea, he does seem to get a kick out of talking to himself.

    On the chance that this is legit, the problem would be cold chimney and/or oversized furnace. Please give some pertinent data that we can work with.

    Model of furnace.

    Size and basic construction of house.

    Type of chimney. (masonry, metal, size etc.)

    Location of chimney. (center of house, on outside wall etc.)
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  7. #7
    Join Date
    Apr 2002
    Posts
    11,808
    Its a troll post. Pages on it before.
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  8. #8
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,923
    Now I feel so........dirty
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


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