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  1. #1
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    Feb 2008
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    78

    Mold on blower housing - is this a problem? (picture)

    This is a picture of the blower of my outdoor Trane duel-fuel unit. I live in NC. The unit is in our back yard. My HVAC tech says this is a concern and that a UV light thing would help control it. Should I be concerned? I haven't seen mold elsewhere.

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  2. #2
    Join Date
    Aug 2012
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    North Dakota
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    518
    I would be concerned though I would not think of a light to solve the problem
    start by cleaning then seal the source
    the the light may be the answer to keep it away if inreality its due to high humidity levels?

  3. #3
    Join Date
    Feb 2008
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    78
    Does mold on the surface of an outdoor blower necessarily mean that mold is also in the ducts, etc? Is it possible that the mold is just due to outdoor humidity, not indoor?

    What do you mean by seal the source?

  4. #4
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
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    14,915
    I'd just clean it off with an all purpose cleaner that is safe for plastic, and make sure the access panel has a good seal around it.

    Make sure the evaporator coil is clean, and that the filtration is good. A UV light in the ducts, or irradiating the coil would do exactly nothing for what is in that picture.
    A UV light positioned to prevent growth on the blower housing would destroy the blower housing, and the wiring for the motor.

    That part of the unit is a very humid environment in the cooling mode, and becomes a warm humid environment when the AC shuts off
    If more government is the answer, then it's a really stupid question.

  5. #5
    Join Date
    Aug 2012
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    North Dakota
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    I think its like rust it spreads
    My thaut is that compartment is in a negitive and being outside it may pull in rain water or outdoor humidity it should be water tight any and all outside components must be sealed and insulated as-well

  6. #6
    Join Date
    Aug 2012
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    North Dakota
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    aside from that I sure wouldn't want to breath the indoor air that has been drawn across the mold in your pic's
    Im no expert though it dont look healthy

  7. #7
    Join Date
    Feb 2008
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    78
    Quote Originally Posted by mechanical'al View Post
    aside from that I sure wouldn't want to breath the indoor air that has been drawn across the mold in your pic's
    Im no expert though it dont look healthy
    How is the indoor air affected by the outer housing of the blower? Is air drawn across the blower housing? The evap coil looked fine - no mold.

    The access panels are removable with screws, so how could they be sealed? Wouldn't you then be unable to remove them?

    Still wondering - is this normal on an outdoor unit, or something I need to look into further?

  8. #8
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
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    14,915
    Quote Originally Posted by mechanical'al View Post
    aside from that I sure wouldn't want to breath the indoor air that has been drawn across the mold in your pic's
    Im no expert though it dont look healthy
    Mold is all around and on us.
    On every surface in our homes, on every bite of food, in every breath we take!

    The bacteria living in your gut out number the cells that make up your body!

    Living at the base of your eyelashes, there are creatures that looks like horror show monsters!

    Sleep well tonight.
    If more government is the answer, then it's a really stupid question.

  9. #9
    Join Date
    Aug 2012
    Location
    North Dakota
    Posts
    518
    no I would not seal the doors ! the door should be gasketed and covered from rain!
    no that is not normal on outdoor units and yes air is drawn accros the blower housing as in all surfaces inturnal they are in the airstream
    is that a air-born mold? I dont know? is it healthy ?

  10. #10
    Join Date
    Feb 2008
    Posts
    78
    Anyone else have an opinion? I woud like to know if my picture looks like something that you professionals see regularly, and what you recommend to the homeowner to do about it, if anything. To be clear - I'm not 100% sure it is mold, just obviously some sort of growth.

  11. #11
    Join Date
    Jul 2010
    Location
    nebraska
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    1,629
    Not uncommon to see a little growth and it probably is one of the hundreds of varieties of mold that's around us everywhere. Have him clean the thing and change the filter a little more often. No dirt to feed on and you wont have colonies growing.

  12. #12
    Join Date
    Feb 2008
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    78
    Quote Originally Posted by martyinlincoln View Post
    Not uncommon to see a little growth and it probably is one of the hundreds of varieties of mold that's around us everywhere. Have him clean the thing and change the filter a little more often. No dirt to feed on and you wont have colonies growing.

    Do you mean the rertun filter(s) in the house, or is there a filter in the unit itself that requires changing?

  13. #13
    Join Date
    Mar 2005
    Location
    burlington county n.j.
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    9,764
    Quote Originally Posted by mark beiser View Post
    I'd just clean it off with an all purpose cleaner that is safe for plastic, and make sure the access panel has a good seal around it.

    Make sure the evaporator coil is clean, and that the filtration is good. A UV light in the ducts, or irradiating the coil would do exactly nothing for what is in that picture.
    A UV light positioned to prevent growth on the blower housing would destroy the blower housing, and the wiring for the motor.

    That part of the unit is a very humid environment in the cooling mode, and becomes a warm humid environment when the AC shuts off
    clean it up and make sure all the doors and ducts are good and tight.

    uv light would destroy that unit.

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