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  1. #1

    Can a rube like me clean the evaporator coils?

    I have a Carrier FA4BNF048 that keeps icing up. I'm guessing (and please tell me if I'm off base) that this may be the result of something that happened a while ago:

    I neglected to change the blue fiberglass filter (don't worry, I've switched to pleated paper since). The unit iced solid and when it thawed, it drenched the filter which disintegrated and got sucked up into the evaporator.

    I took a grate of one of the returns and snaked the hose from my shop vac underneath, but then had to reach in though the little slot for the air filter to actually do the cleaning.

    Is this something your layman should be able to do, or do I have to call in a professional?

  2. #2
    Join Date
    Jun 2005
    Location
    The Gray Northwest
    Posts
    661
    If your coil is icing up, better get it checked out and soon.

  3. #3
    Join Date
    Mar 2008
    Posts
    205

    Doubt if you're gonna get much guidance on here

    young grasshopper.

    No pricing, no DIY, please read Site Rules Register

  4. #4
    Join Date
    Aug 2003
    Location
    Lincoln, Nebraska
    Posts
    1,051
    If your using one of those 3m pleated filters that may be your whole problem. They restrict air even when clean.
    Its a good Life!

  5. #5
    I'll call a pro, but I'll have to clean my garage first!

  6. #6
    Join Date
    Jul 2007
    Location
    san antonio
    Posts
    51

    Confused 3m filters bad?

    Never heard that 3m filters restrict air flow right off the bat, true?

  7. #7
    Join Date
    Jul 2002
    Location
    Zelienople, Pa
    Posts
    2,965
    Quote Originally Posted by sanantoniotech View Post
    Never heard that 3m filters restrict air flow right off the bat, true?
    true
    How tall are you Private???!!!!

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,722
    Quote Originally Posted by sanantoniotech View Post
    Never heard that 3m filters restrict air flow right off the bat, true?
    110% TRUE!!!
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    Mar 2003
    Posts
    7,321
    many standard air handlers cannot handle the pressure drop across the pleated type filters, even with fan on high speed. They may be okay for the first week or so, but when filters start to get loaded airlfow drops off and presto. We have one building where the owner is willing to change filters monthly to keep the place clean by using pleated filters. Every unit is less than two years old, and is a standard carrier. If left for more than one month, I get calls about units freezing up. He is not willing to go to regular filters.

  10. #10
    Join Date
    Apr 2007
    Posts
    623
    Quote Originally Posted by sanantoniotech View Post
    Never heard that 3m filters restrict air flow right off the bat, true?
    Removed 2 today at seperate jobs.

  11. #11
    Join Date
    Jan 2008
    Posts
    1,958
    The 3M pleated filters are fine, if you're ductwork is designed for that level of drop. Which most aren't. I tell all customers not to use them, but if they insist, I tell them to change them weekly, or I'll be back soon, to tell them why the system has iced up. Again. 3M's are not good.
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  12. #12
    Join Date
    Jul 2006
    Location
    memphis
    Posts
    81

    pleated filters

    I tell a lot of my customers to go to the cheaper filters to improve ac performance. Some units just can't push through the thicker stuff!!!

  13. #13
    Join Date
    Jun 2008
    Location
    west point, ga.
    Posts
    328
    Tell them to use fiberglass filters and sprinkle furniture polish on them.

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