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  1. #1
    Join Date
    Aug 2012
    Posts
    11

    New AC Unit but No Cooling

    The AC (3 tons) in the home (about 1600 sq ft) I am renting was replaced less than a month ago.
    Thermostat setting: cool to 78 deg F.
    Average outdoor temps: Day 105 deg F; Night 82 deg F

    Observations:
    1) Temperature never goes below 81 deg F, even at night.
    2) Air coming out of the vents does not feel cool.
    3) High pressure line both near the indoor evaporator & the outside condenser do not feel warm.
    4) Low Pressure line both near the indoor evaporator & the outside condenser feels cool (but not as cool as the ones my neighbors' home ACs).
    5) Low pressure line both near the indoor evaporator & the outside condenser do not sweat.
    6) Unit just keeps running but since the target temperature is never reached, the unit never stops.

    What the AC technicians said:
    1) Thermostat was not set properly.
    Action Taken: I had the technician set the thermostat himself just to make sure.
    Result: No change in AC cooling performance

    2) The filters need to be changed.'
    Action Taken: Put in new (regular) filters both at the evaporator & at the door leading to the space where the evaporator is hidden.
    Result: No change in AC cooling performance

    3) The temperature outside is too hot that the AC can't keep up.
    Action Taken: Added insulation to the doors and windows where warm outside air was probably passing through.
    Result: No change in AC cooling performance

    4) Freon not enough
    Action Taken: AC tech took measurements at the condenser & said that the freon levels were OK.
    Result: None since the property manager did not want to add freon if levels were OK.

    The property manager says that since the AC techs already checked the system twice after the new unit was installed and did not find anything wrong with it, she can't do anything else for me.
    That is unacceptable since my neighbors' ACs are the same as ours and whose houses are of the same size and yet their homes are cool, even during the hot afternoons.
    Mine does not even go below 81 at night.
    I wake up in the morning before the sun rises and I'm lucky if the temperature gets to 81 deg F.
    I suspect that either the AC unit was improperly installed, that they failed to do something, or something was improperly done.
    I think I'll be better off opening the windows and turning on the ceiling fans.

    I would like to know what other things need to be considered based on the observations I made and what else need to be checked.
    It's really uncomfortable at home, especially during the mid to late afternoons when the indoor temp goes up to 90 deg F (in spite of a thermostat setting of cool 80 deg F).
    My electric bill is almost double of what I normally get... I expect the next one to be higher.
    On top of that, I have a 14-moth old baby at home.
    Please help!

  2. #2
    Join Date
    Mar 2007
    Location
    Chicago
    Posts
    28
    Does the unit have a TXV or a fixed metering device? What method was used for charging?


    The Day You Think You Know Everything Is The Day You Stop Learning.

  3. #3
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,665
    Move to a house that the ac works properly ,your land lord probably had low bidder do the job

  4. #4
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    is this cooling only or heat pump; or did I miss that info?
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  5. #5
    Join Date
    Mar 2009
    Location
    Mount Holly, NC
    Posts
    3,185
    many signs of what you are reporting point to the problem. unfortunately, we would have to be there to fix the problem.
    you have two choices. call a qualified service tech out, and pay them to fix the system, or move. if you pay to fix it, it's POSSIBLE the landlord will reimburse you for the repairs, but unlikely.
    The TRUE highest cost system is the system not installed properly...
    The three big summer hearththrobs...
    Mel Gibson
    Dwane Johnson
    The A/C repairman

  6. #6
    Join Date
    Aug 2012
    Posts
    11
    I don't believe there is a TXV.
    All I was told is that after replacing the condenser unit outside they checked the freon levels and said they were OK.

  7. #7
    Join Date
    Aug 2012
    Posts
    11
    Quote Originally Posted by dandyme View Post
    is this cooling only or heat pump; or did I miss that info?
    The thermostat works for both heating & cooling.
    Does that mean I have a heat pump.
    Sorry, I don't know how to identify which is which.
    How do you find that out, by the way?

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,048
    Post brand and model number of both the inside unit and the outdoor unit.
    Contractor locator map

    How-to-apply-for-Professional

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

  9. #9
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Quote Originally Posted by saintmichael36 View Post
    Does the unit have a TXV or a fixed metering device? What method was used for charging?


    The Day You Think You Know Everything Is The Day You Stop Learning.
    A home owner isn't going to know that information.

  10. #10
    Join Date
    Aug 2012
    Posts
    11
    Quote Originally Posted by vstech View Post
    many signs of what you are reporting point to the problem. unfortunately, we would have to be there to fix the problem.
    you have two choices. call a qualified service tech out, and pay them to fix the system, or move. if you pay to fix it, it's POSSIBLE the landlord will reimburse you for the repairs, but unlikely.
    That's what I intend to do - look for a CERTIFIED PRO and have them check the system.
    I just hope that the true problem could be resolved or, at least, found so I would have a better chance of asking the owner to reimburse me.

  11. #11
    Join Date
    Aug 2012
    Posts
    11
    AC Condenser unit was replaced about 3 week ago.
    Specs:
    Goodman GSC130361GA
    208 - 230 volts AC
    60 Hz
    Fan motor: 1.10 FLA; 1/6 HP
    Compressor: 13.4 RLA; 74 LRA
    Min Ckt amps: 17.9
    Nominal operating charge: 77 oz (R-22)

  12. #12
    Join Date
    Aug 2012
    Posts
    11
    AC Evaporator coils were acid washed a week before the condenser was replaced.
    Specs:
    Payne model PF1MNC036
    Prod Num: PF1MNC036000AAAA
    208 - 230 volts AC
    Motor: 2.4 FLA; 1/3 HP
    Phase 1
    60 Hz
    R-22 design PSIG: 300

  13. #13
    Join Date
    Aug 2012
    Posts
    11
    Quote Originally Posted by beenthere View Post
    Post brand and model number of both the inside unit and the outdoor unit.
    Condenser: Goodman GSC130361GA
    Evaporator: Payne model PF1MNC036

    I posted more specs on both via Quick Post.

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