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  1. #1
    Join Date
    Oct 2009
    Location
    Eastern Washington
    Posts
    48

    AC fan runs but compressor stops(?)

    Carrier. Residential.

    Thermostat set @ 68. Compressor stops. Outside fan still runs. House heats up to 72.

    Dealer said recent high temperature days can cause unit to ice up. (I turned off unit and sprayed with hose...turned back on and I think I hear compressor start up...cool air starts again.). Told to keep temp in house @ 70ish and not set at high 60's.

    Problem goes away when evening comes----We run unit at night down to @ 63.

    Is this a compressor problem or a problem with Carriers?

    Doug

  2. #2
    Join Date
    Sep 2003
    Location
    Portland.OR
    Posts
    313

    Its a common electrical failure most likely

    Call your Pro Tech, he should have the parts "on the truck" or at the shop!!
    Everything wears out, breaks or quits.. it just questiion of WHEN!

  3. #3
    Join Date
    Jun 2011
    Location
    Hammond,La.
    Posts
    1,176
    You should have the airflow checked followed by the proper charge for your system. Make sure your filters are clean or at least have a new one on hand before the tech gets there. Clogged filters will cause lower CFM's which can lead to evaporator icing doe to restricted airflow. Sounds like your compressor is shutting down on high pressure shut off or thermal overload if hosing the compressor off with water helps. Call a tech out asap.
    "I am for doing good to the poor, but I differ in opinion of the means. I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it."
    Benjamin Franklin, 1766

  4. #4
    Join Date
    Oct 2009
    Location
    Eastern Washington
    Posts
    48
    Using electronic airfilter....it's cleaned. Will remove the 2 metal screen/filters and see what happens.

  5. #5
    Join Date
    Jun 2011
    Location
    Hammond,La.
    Posts
    1,176
    68* seems a little cool for a typical residential unit to try and maintain in the average home here in the south since the temps are so high. What is your relative humidity in your home? Looks like your outside RH in the AM is pushing 90% for august in Washington and 55% after noon. Do you know what your homes RH% is? Just wondering if you are not getting proper dehumidification in the home since you keep the stat so low.
    "I am for doing good to the poor, but I differ in opinion of the means. I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it."
    Benjamin Franklin, 1766

  6. #6
    Join Date
    Nov 2010
    Location
    N. Idaho
    Posts
    586
    Certainly not a problem with Carrier, just a problem that needs pro. attention.

  7. #7
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    4,930
    Quote Originally Posted by osage View Post
    Carrier. Residential.

    Thermostat set @ 68. Compressor stops. Outside fan still runs. House heats up to 72.

    Dealer said recent high temperature days can cause unit to ice up. (I turned off unit and sprayed with hose...turned back on and I think I hear compressor start up...cool air starts again.). Told to keep temp in house @ 70ish and not set at high 60's.

    Problem goes away when evening comes----We run unit at night down to @ 63.

    Is this a compressor problem or a problem with Carriers?

    Doug
    Seriously?

    Your putting your stat to low.
    Thats part of the problem.

    If you want it that cold, then you need low temp refrigeration equitment.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  8. #8
    Join Date
    Oct 2009
    Location
    Eastern Washington
    Posts
    48
    Quote Originally Posted by Rcb2875 View Post
    68* seems a little cool for a typical residential unit to try and maintain in the average home here in the south since the temps are so high. What is your relative humidity in your home? Looks like your outside RH in the AM is pushing 90% for august in Washington and 55% after noon. Do you know what your homes RH% is? Just wondering if you are not getting proper dehumidification in the home since you keep the stat so low.
    The RH inside at 7 am is 60; 62% outside

  9. #9
    Join Date
    Oct 2009
    Location
    Eastern Washington
    Posts
    48
    Quote Originally Posted by Rcb2875 View Post
    You should have the airflow checked followed by the proper charge for your system. Make sure your filters are clean or at least have a new one on hand before the tech gets there. Clogged filters will cause lower CFM's which can lead to evaporator icing doe to restricted airflow. Sounds like your compressor is shutting down on high pressure shut off or thermal overload if hosing the compressor off with water helps. Call a tech out asap.
    I removed the two mesh filter screens that are part of the Electronic Filter; kept thermostat at 69 to 70. Early evening the same problem occurred.

  10. #10
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,943
    Lowest setting in residential is 69. Commercial is 68.

    You need a visit from a pro. I can think of at least 5 scenarios that would cause this on ANY brand of unit.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  11. #11
    Join Date
    Dec 2001
    Location
    Ocean Pines, MD
    Posts
    6,961
    63. Should have them change that out to a Trenton system with multiple evaps.

  12. #12
    Join Date
    Jun 2011
    Location
    Hammond,La.
    Posts
    1,176
    I would suggest having the coils looked at to make sure they are clean along with a static pressure test. Your RH% is too high if the unit was trying or keeping the temps at your settings and the outside RH is only 62. You should be at 50-55% RH fairly easy.

    Time to call a pro to go over it.
    "I am for doing good to the poor, but I differ in opinion of the means. I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it."
    Benjamin Franklin, 1766

  13. #13
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,943
    Quote Originally Posted by Stamas View Post
    63. Should have them change that out to a Trenton system with multiple evaps.
    Trenton. I like that.

    United we stand.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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