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  1. #1
    Join Date
    Jul 2006
    Location
    Valley Grande, Alabama
    Posts
    16

    Deposit on Condenser

    Hi,
    Anybody know what this deposit could be and how to get it off. It showed up over the winter while heat pump was running.

    Thanks
    Attached Images Attached Images  

  2. #2
    Join Date
    Jan 2007
    Location
    Southern Indiana
    Posts
    55
    could be wrong but maybe looks like some kind of calcium build up from the fan pulling moisture through the fins while snowing or raining

    they have an acid that is made for cleaning indoor and outdoor unit green for indoor and red for outdoor, you may try that but if the fins don't appear to be stopped up from this build up it's not going to effect the performance
    Shouldn't we be learnin and livin instead of livin and learnin...

  3. #3
    Join Date
    Jun 2003
    Location
    Hell Hole Swamp
    Posts
    4,180
    The fin material is aluminum, the black coating could possibly be wearing off, or it could be corrosion (aluminum oxide)

  4. #4
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Quote Originally Posted by bamamule View Post
    Hi,
    Anybody know what this deposit could be and how to get it off. It showed up over the winter while heat pump was running.

    Thanks
    didnt you post this exact thing about a week ago?

  5. #5
    Join Date
    Dec 2005
    Posts
    783
    It looks like the new Lennox stripe model. Very rare so I would take good care of it.

  6. #6
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,432

    Unhappy Double posts

    Quote Originally Posted by ar_hvac_man View Post
    Didnt you post this exact thing about a week ago?
    I guess slow learning may be a problem here.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  7. #7
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    Some of the coil coating has come off. Unless you live next to the ocean, that won't hurt a thing. If you live next to the ocean the coil coating protects the coil from salt air. Hose the unit off once a month and it will be fine. Hosing any outdoor coil off on a regular basis won't hurt any way and reduces coil corrosion.
    Remember, Air Conditioning begins with AIR.

  8. #8
    Join Date
    Dec 2005
    Posts
    783
    Quote Originally Posted by Kevin O'Neill View Post
    Some of the coil coating has come off. Unless you live next to the ocean, that won't hurt a thing. If you live next to the ocean the coil coating protects the coil from salt air. Hose the unit off once a month and it will be fine. Hosing any outdoor coil off on a regular basis won't hurt any way and reduces coil corrosion.

    Flat black spray paint also works.

  9. #9
    Join Date
    Aug 2006
    Location
    SW, Michigan
    Posts
    160
    This is a common problem in West Michigan, don't know what causes it or how to correct it, but would like to. Don't think spray paint is the answer though. Would create clogs in the coil, and would create an insulating layer on the fins, the manufacturer uses a micro thin layer of a specially formulated paint. Might be a good band-aid for a dealer with an un-happy customer who dosen't know any better and is just concerned about appearance.

    BTW this will not affect performance.
    GOD knows if you did your best! <><

  10. #10
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,376
    I've seen Lennox heat pumps do this. If it's not scale it's just the paint coming off...most likely from the many cycles of freeze/thaw the coil surface undergoes all winter long.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  11. #11
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,517
    i would just hose the coil out and not worry about it
    as has been said ice and defrost cycling has duled the color

  12. #12

    Coatings

    The black coating is most likely pre-coated fin stock. The white poweder could be oxidation on the fin edges as these are not protected during coil process or it could be a residue of some sort not even related to corrosion. My guess is oxidation at these exposed edges. Corrosion creepage will compromise fin integrity, cause fin failure and eventually a lack of heat transfer.

    M

  13. #13
    Join Date
    Mar 2007
    Location
    Okieville
    Posts
    312
    This will also happen if the service tech that PM'd your unit used too much coil cleaner on the unit and ate some of the black coating off. It happens.

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