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  1. #1
    Join Date
    Jan 2008
    Location
    Louisville,ky
    Posts
    32

    It is 35 degrees here,My coil has alot of frost

    I notice this yesterday and today.I thought that is was just from alot of moisture in the air. My heat pump has alot of frost,I mean covered enought,that the coil is all white, air can get thru it.Than it going thru a defrost,and it cleans again.It is all off.My timer is set for 30min and it is Goodman CPKJ60-1C.Should I go buy another OT senser,are move the senser lower to the colder part of the coil.THX Again

  2. #2
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    I'm confused about what your point of concern is.

    Heat pumps frost up quickly when there is a lot of moisture in the air, and it is in the 30-45Ί range outside.
    As long as yours is defrosting, I don't see what the issue is.
    If more government is the answer, then it's a really stupid question.

  3. #3
    Join Date
    Jan 2008
    Location
    Louisville,ky
    Posts
    32

    Thank you Mark for writing back.I've never seen it this heavy

    I've had this heat pump for awhile,and never seen it build up this much before.To me,it should go into defrost alittle sooner,because it is almost pluged.Solid white,and no air can get thru the fins.I just have a little concern.THX Again

  4. #4
    Join Date
    Jun 2003
    Location
    Hell Hole Swamp
    Posts
    4,180
    If its set to 30 minutes, thats as often as it can defrost, certain weather conditions arent ideal for heat pumps, and they accumulate frost quickly, nature of the beast

  5. #5
    Join Date
    Apr 2007
    Posts
    6,285
    You might be able to search the site for the other threads.

    Is the HP in the shade or does it have a tree over it or bushes up next to it?

    Basically is it clear of all possible obstructions?

    Does it sit in the shade?

  6. #6
    Join Date
    Jan 2008
    Location
    Louisville,ky
    Posts
    32

    Thx again,Its on the east side nothing around it.

    Maybe its just me,but it is building alittle more than normal,before it will go into defrost.I think you are right,There a ls alot of moisture out there today.
    I'll just keep watching it,as long it defrosted it that's what matters.THanks

  7. #7
    Join Date
    Feb 2007
    Location
    18951
    Posts
    1,593
    Don't be too concerned, but keep an eye on it. Under those weather conditions, they do frost up. Even if it goes into defrost, and not all of it melts, don't turn it off. If it doesn't all melt off after a few cycles, you might want to have it looked at.

    When a heat pump defrosts, it reverses back to the cooling mode, and also stops the outside fan. At that point, it needs a full refrigerant charge.

    Was it cooling fine last summer?
    Is your air filter clean?

  8. #8
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,339
    if its holding your setpoint temp inside, i wouldn't woory about it the more time you go into defrost, the more you are using the electric heaters during the defrost period, the more money you will be paying on the utility bill. this is why i like demand defrost over 30 60 90 boards!! a demand defrost system looks like what you describing for a very long time before it defrosts. and its always humid in NC
    If Guns Kill People, Do Pencils Misspell Words?

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  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,721
    Have you changed your air filter lately.
    When was the last time you had it serviced.
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    How-to-apply-for-Professional

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

  10. #10
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,923
    There could certainly be something wrong if this has never occured in the past. However; the defrost cycly controls are about the only thing that are absolutely working correctly.

    • Low outdoor airflow.
    • Low refrigerant charge.
    • Partially blocked outdoor coil.
    These are some of the things that could be at fault. You really should have a professional take a look at your system to determine if any of these factors exist and why.

    Is your heat pump set up off of the pad so that the condensate during defrost cycles can drain away properly?

    Do you see any disfiguration of the lower section of coil fins on the outdoor coil? If so, ice may have formed around the bottom of the coil and may have crushed to lower coils.
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  11. #11
    Join Date
    Nov 2004
    Location
    NJ
    Posts
    1,195
    Quote Originally Posted by beachtech View Post
    this is why i like demand defrost over 30 60 90 boards!! a demand defrost system looks like what you describing for a very long time before it defrosts.
    I'm not familiar with a demand defrost without a timer, could you explain how it works please .

    OP, if you see more frost than you are accustom to seeing, it's time to call "the guy" IMO.
    Ed J

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