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Thread: Heat Pump

  1. #1
    Join Date
    Jul 2005
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    4
    What could cause a heat pump to freeze up in the summer time on the outdoor unit? The unit has been throughly cleaned and checked for low freon.

  2. #2
    Join Date
    Nov 2004
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    2,927
    thermostat operator error

  3. #3
    Join Date
    Jul 2005
    Posts
    4

    fixing error on thermostate for heat pump

    How would I find the problem and fix the error on thermostat for heat pump if it is frezzing up in the summer time?

    [Edited by naneykat on 07-04-2005 at 05:40 PM]

  4. #4
    Join Date
    Nov 2004
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    2,927
    I was joking.
    I dont think I have seen that happen before,or dont understand your question.

    You are saying that the outdoor coil becomes frosted?
    Or are you saying that the copper tubes and compressor,accumulator,reverse valve get frosted?

    Try to be as specific as possible.What is freezing,where is it,when,ect.
    We can give a good guess what the problem is,but more than likely you will need to have a qualified person to look at it.

    [Edited by jacob perkins on 07-04-2005 at 05:28 PM]

  5. #5
    Join Date
    Feb 2003
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    South Carolina
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    1,333
    you might have been right on the first one

  6. #6
    Join Date
    Jul 2005
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    4
    The outdoor copper tubes and compressor,accumulator,reverse valve get frosted. After you defrost it the unit cycles off and on with no problems for about 24 to 48 hours before it happens agian. I have not had to deal with Heat pumps to much.

    [Edited by naneykat on 07-05-2005 at 01:19 AM]

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,090
    Indoor blower motor bad, or indoor blower relay, or the stat isn't always energizing the indoor blower.

    You need a real tech to find out.
    Not just a gas and go.
    Contractor locator map

    How-to-apply-for-Professional

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

  8. #8
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    check you air flo and filters. make sure all outlets are open. you may be low refrigerant but may not be. not all problems are refrigerant lose related. there may be a restriction in the system. call a service tech to help you out. heat pumps can get very diffacult and only someone that knows them should fix them

  9. #9
    Join Date
    Mar 2002
    Location
    Concord, CA
    Posts
    2,635
    A priest, a minister and a rabbi walk into a bar. The bartender looks at them and says, “Hey. Is this some kind of a joke?”

    Wait... sorry. You said no jokes.

    Just to expand on the operator error theory: Setting it too low and/or running it at night doing the same will cause what you describe. I'm also inclined to think low airflow because of restricted ducts, a dirty filter or whatever. This isn't really any different than an AC problem.

    The best answer given though was to call a real tech.

  10. #10
    Join Date
    Jul 2005
    Posts
    4

    Lightbulb

    Thank you for your imput. I do have 11 years experience just not with heat pumps. And everything you all have suggested I already checked and have thought of. Thanks anyway!!!



    [Edited by naneykat on 07-05-2005 at 01:24 AM]

  11. #11
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    forget heat pump
    lines and compressor freeze up i will assume the evap coil is also. now with 11 in the trade what will cause an ac unit to ise up. this is what you are dealing with when is the ac mode.

  12. #12
    Join Date
    Apr 2004
    Location
    Niantic, Illinois
    Posts
    545
    I'm betting dirty evap. coil. If it's a Trane, they have been having problems with check valves sticking of late also. Check the temperature on each side of each check valve. A valve that is open will have practicaly no temp difference side to side, a closed check valve will read different temps side to side. Figure out who is open and who is closed then check if that is the position it should be in at this time.

  13. #13
    Join Date
    Mar 2002
    Location
    Richmond, Virginia
    Posts
    4,264
    Post your superheat, subcooling temps. along with outdoor d.b., indoor w.b. temps, high and low side pressures, and if handy, your supply and return duct static pressure readings and I bet you will get answers from the professionals here.
    There is nothing more frightful than ignorance in action....Mark Twain

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