Is it normal A/C performance ???

Discussion in '3rd Gen - 2007 - 2017' started by Mubarakma, Jun 14, 2019.

  1. Mubarakma

    Mubarakma Full Access Members

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    Hello everyone our actual summer started here currently weather temperature on peak hours will reach 122+ F for almost June, July and August my car is 2010 Limited Black on black yesterday I checked A/C system at local garage for any leak or compressor issue but nothing found everything working as required and the guy can't identified any problem but I feel it's not performing well I feel that there is problem and it's not normal yes it's true blowing air is superior no doubt but it's not that cool when I compared it with other car I have which is Lincoln T.C 2000 not serviced since past four years but that car having a superior A/C system even on sever temperature condition 122+ F you can get cooled air 34 F coming out from duct but in the expedition you can see 44 F at night only with almost everything new in A/C system circuit .
    Now I'm planning to add extra fan that working with A/C which may help solving this problem.
    Thank you in advanced
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  2. RogerD1959

    RogerD1959 New Member

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    The rule of thumb regarding A/C. It should cool between 35 and 40 deg. F below ambient outside temp. So if its summer in Phoenix AZ and the temp is 110 Deg. F, the vehicle should be blowing air at around 60 to 75 Deg. F. Also the reason I think your Lincoln A/C works better it is using the old R-12 Freon. Sad to say, the new stuff does not bleed heat as well as the old stuff. But at least we are saving the Ozone layer somewhat. Also, A/C does not work as well in low humidity where there is little moisture in the air.
     
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  3. RogerD1959

    RogerD1959 New Member

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    OMG, I just saw where you live! I would say if you get a vent temp 25 deg. F below ambient you are doing well.
     
  4. stamp11127

    stamp11127 Super Moderator Staff Member

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    You have the worse case scenario - hot climate and black on black vehicle. That combination is a heat magnet. To get an accurate performance condition you need to know the systems static pressure, the low and high side pressures, and ambient temperature when you take the readings.

    Back to the garage, hook up the gauges again in the shade and post pic of the gauge readings with the engine running. Also post the ambient temp.
    For the static temp the system needs to have been off for around 30 minutes so that the system will equalize pressure on both sides.

    The condenser and radiator need to be clear of any obstructions, fan clutch & fans need to be operational.

    The cabin filter if used, needs to be clean also.

    R12 was eliminated from auto production in 1993, r134a was implemented the next year. Your TC should also be r134a.
     
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  5. cmiles97

    cmiles97 Full Access Members

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    Are you using max ac or recirculated mode? Rather than cooling 122F air all the time, the air temp being returned to the system will steadily drop, assuming no windows or sunroof open.

    Getting 78F drop is impressive.

    I'd say it's fine. The comparison with the older car doesn't work as it may simply have a larger AC capacity because they didn't design cars to be as energy efficient as possible back then. It would be like 2 of the same size condos, one has a 3 ton AC unit the other a 5 ton. The 3 Ton will be the most efficient as it will meet load 85% of the time. The 5 ton will use more power during those lower load times but work best the 15% of the time when the OA temp is above 90F. The higher the OA temp goes the 3 ton will not keep it as cool. If 3 tons works 85% of the time, it'll be chosen for max energy efficiency.

    I'm sure you got the basics down, if not I find this guy informative:
     
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  6. jeff kushner

    jeff kushner Full Access Members

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    Especially the Condenser.....they are nearly always filled with bugs, sand(which you have a fair bit of) and other debris and they are sized per specific use so keeping it at full capability is paramount. Check and you'll prob see it blocked.....high pressure hose works well, specialized solutions work better.....have a little fun....run the AC on full for 10 minutes, check temps...now watch the temps as someone pours a pitcher of water over the condenser coil.....

    LOL....that's why you need to keep it clean so it can shed the highest amount of latent heat possible!

    jeff
     
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  7. cmiles97

    cmiles97 Full Access Members

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    Here is your solution for those hottest days of the year.

    expedition windo ac.jpg

    Here's an old version of a hybrid

    lincoln window ac.jpg
     
  8. cmiles97

    cmiles97 Full Access Members

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  9. Mubarakma

    Mubarakma Full Access Members

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    Thanks a lot but where I live temperature far more just today 46 C "114.8 degrees Fahrenheit"
    A/C I believe I have a problem with A/C system
     
  10. Mubarakma

    Mubarakma Full Access Members

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    Thank you very much just today I made a test with my cousin Explorer 2008 Limited also it's black on black there was really a huge different between his car and mine I will dig more with one guy his car is GCC spec maybe my car designed for Canada spec because of that any way I will not conclude anything right now but next step is cleaning the radiator and change the coolant after that I will compare it with Expedition with GCC spec
    There is one more point is it possible that blind door actuator will create such thing .
    I will first clean the radiator then I will see what is next .
    Expedition in the shade and open area
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    atmospheric temp reading on Expedition
    [​IMG]

    Explorer in the shade and open area also it's black on black
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    atmospheric temperate reading at explorer
    [​IMG]

    Both cars was at same location and at same time while taking the readings
    Thank you again .

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