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  1. #14
    Join Date
    Dec 2004
    Posts
    201
    forget what you just read and call a pro, if the unit is overcharged what are you going to do with the extra refrigerant?

  2. #15
    Join Date
    May 2002
    Location
    Colorado
    Posts
    697
    Psssssssssssssssssssssssssssssssssssssssssssssssss sst.

  3. #16
    Join Date
    Apr 2004
    Posts
    7,680
    Originally posted by w30olds

    If you take the outside temp and add 30 degrees then this should give you a "target pressure" of what your high side pressure should be running around. Low side pressure should be relevent to the high on the pressure/temp chart.

    Oh, now that sounds like e-bay advice there.

    "Prehistoric, outdated rule of thumb" I'm selling this rule of thumb because I no longer use it. I found out recently that it only applied to systems with cap tubes and low efficiency systems but figured some of you beginners might want an easy way to hack into the HVAC market. Beginning Bid.... $0.49

  4. #17
    Join Date
    Jan 2002
    Location
    Ft.Worth,Tx
    Posts
    4,584
    Originally posted by morepwr
    hello ..im trying to fix my ac unit..i bought the house new ten years ago and it came with a bdp air conditioner the house is 1900 sq feet..im not sure of the tons.. i get 60 to 63 deg out of the registers..but upstares stays hot the lowest i can get it to is 85 deg in the afternoon and if i run the unit all day it will cool down to 80 at 11.30 pm..yersterday i measured the outside temp and it was 110 deg.. the temp at the ac fan was 120 deg.. i used a set of old manifold gages and the low side read 110psi and the hi side when you first start the unit peg the gage over 500psi.. then droped down to 495.. can my ac be overcharged.. what psi should i be looking for ..the ac modle number is 561aj048-f thanks for your help.. bye
    With this high of head pressure you would be wise to call a service company before you loose a compressor.
    Things you can do.

    1. Check your filter and if it is clean, over a month old replace it.
    2. Turn your system off tonight,say about 7:30pm and clean your outdoor unit,hook up spray nozzle and wash out unit holding nozzle about 10" away from outdoor coil section spraying water from top to bottom, all the way around your unit and then do it again. turn you system back on and see if this helps..

    If not then better get help quickly before your compressor blows.The unit sounds like maybe restriction or bad condenser motor..
    "Everyday above ground, is a good day".
    "But everyday that you have made a difference in someones life, may insure you stay above ground a little longer".<aircooled>

  5. #18
    Join Date
    Mar 2003
    Location
    Cincinnati
    Posts
    7,977
    I smell a rat.

  6. #19
    Join Date
    Jan 2005
    Location
    Winder, GA
    Posts
    22
    Originally posted by docholiday
    Originally posted by w30olds

    If you take the outside temp and add 30 degrees then this should give you a "target pressure" of what your high side pressure should be running around. Low side pressure should be relevent to the high on the pressure/temp chart.

    Oh, now that sounds like e-bay advice there.

    "Prehistoric, outdated rule of thumb" I'm selling this rule of thumb because I no longer use it. I found out recently that it only applied to systems with cap tubes and low efficiency systems but figured some of you beginners might want an easy way to hack into the HVAC market. Beginning Bid.... $0.49
    Ok expert what's your advice? I could tell him to check the superheat, or is that "Prehistoric, outdated rule of thumb" as well? Was just trying to give the guy an idea of where his pressures should be running.

    [Edited by w30olds on 07-19-2005 at 09:53 PM]

  7. #20
    Join Date
    Mar 2003
    Location
    Cincinnati
    Posts
    7,977
    How long do you think the compressor would run at 495 head?? He's screwing with you guys.

  8. #21
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,516
    agree something is not right about this tread
    if you are for real
    turn the unit off and get help before you get hurt

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