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Is it normal A/C performance ???

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

  1. max78

    max78 Full Access Members

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    I have had that happen to me so many times its not even funny! The other one that gets me is my buddies will turn on the heated seats while I'm not looking.
     
  2. Mubarakma

    Mubarakma Full Access Members

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    Thank you very much to all of you now there is little improvement on A/C performance after replacing the coolant, thermostat and cleaning the radiator I'm able to see 42-44 F on city and 40 F on highway driving I believe still there is area of improvement because the radiator is in bad condition even after cleaning will be replaced next summer along with flushing cooling system overall I'm happy with what I'have now again thank you all
     
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  3. TobyU

    TobyU Full Access Members

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    Cool! Literally. I consider anything under 45 at idle or around town perfect for 134A subpar crap.
    There are 134a systems that get REALLY cold. I had a 2000 LHS that we had just put a junk yard compressor on as the old one was damaged in a wreck that hit 29 coming out the center vent on a side road when I didn't have the fan blasting on full.
    Rare for r134 to get cold enough to frost though.
    I have an 87 Buick Grand National with GM R4 junk compressor that was retroed to 134a and I have a pic of the black metal low side lines coming out of AV bottle that are icing up and growing in size along with the AV bottle /can being frosted over completely.
    That's cold for a retro. But the car has a huge condenser up front.
     
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  4. Mubarakma

    Mubarakma Full Access Members

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    Thank you
    Really I'm happy now with A/C currently our atmosphere temperature is more than 46 Degree Celsius"114.8 degrees Fahrenheit" it will reach to 50+ degree Celsius "122 degrees Fahrenheit" normally in July temperature will be in the range of 46-52 which is extremely hot and while you drive if open your window you might be looking like this ​
    [​IMG]
     
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  5. yellowdogrods

    yellowdogrods New Member

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    New to forum and just found it this evening while searching for possible answers to my wife’s complaints about my truck’s ac (2015 F-150) being much colder than hers (2017 Expedition).

    Hopefully someone on here might have an idea why this might be. First thing I did was go to WM and buy a can of refrigerant after I checked her Expedition to find the air was not cool what-so-ever. Connected the gauge on the low-pressure port which showed the charge to be only slightly low. Proceeded to add refrigerant as per the directions. After getting it charged mid-way through the green range on the gauge, found I was successful in getting the front air cooled off again and was quite proud of myself! I’m not much of a mechanic but google and YouTube have helped me diagnose and fix quite a few things over the years. However....the rear air is blowing warm air and I cannot understand why. I’m not 100% certain but I don’t believe there’s a separate system or low pressure line for the rear. I think I understand there to be only one system and if you charge the system it should work for both the front and rear. The other possibility I have seen is there could be a bad expansion valve?

    Anyone have any experience with this type of thing? If so I’d sincerely appreciate some insight or suggestions. If no ideas, I may just take to the dealer but I prefer to fix myself if possible.

    Thank you!
     
  6. 07navi

    07navi Full Access Members

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    There are ac parts way in the back also I think that truck has an expansion valve and not and orifice tube but it does have another evaporator back there and the rear blend door actuator is what usually goes bad. You can access all that by taking the rear panels off. To answer your question about a separate pressurized line; no there is only one and it is accessed at the front. The expansion valve can stick also. If you don't have a gauge set with hoses you will surely need one. They make kits to block off the rear if you want to go that route. Don't let it run out of 134a refrigerant or you will have to evacuate the whole system and recharge. Those with rear air systems take a lot of "Freon". (They don't use Freon anymore.) There is another heater core back there to, much like the front setup.
    The evaporator looks like the heater core but puts out cold air. The blend door needs to control where the air from the rear fan is going and the often quits doing that...…..to put it simple.
     
    Last edited: Mar 15, 2020
  7. TobyU

    TobyU Full Access Members

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    Usually you will hear clicking from the blend door actuator in the rear when you're going from hot to cold instead of just moving over smoothly. Anytime you hear One clicking when you change the temperature from hot to cold you know there's a problem with the blend door actuator. It will usually stick on full hot or full cold and often not move between the two.
    As stated in the last post, you can pop the cover off or some of them have a little top access panel you can get into a little easier and see if the lines are actually getting cold back there. They probably are if your front is pretty cold.
     
  8. aagitch

    aagitch Full Access Members

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    Your '17 should get pretty cold both front and back. Mine does well when I'm in Florida for parts of the summer. Although between city and hwy driving I would constantly have to adjust the manual controls to compensate but it always gave me the cold I needed. Here in Kentucky it doesn't get hot enough for me to have to do that. I have Auto climate control now so looking forward to using that down in Florida this coming summer. Oh hell you're in Florida so you now what I mean about the stop and go city driving there.
     
  9. Trainmaster

    Trainmaster Old School Member

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    Yes, check the back blend door. If it clicks when you turn the back controls, the actuator motor has to be replaced. Not a bad or expensive job.
     
  10. yellowdogrods

    yellowdogrods New Member

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    Thank you everyone for the excellent responses. I will most likely get it to the dealer as the responses provided sound more in depth than just adding refrigerant. I may piddle with it this weekend for a few minutes, if nothing else, to see what and where everything is and where it is all located so I am more familiar when the dealer is filling me in on what the problem is. Again, thanks to all who responded for taking the time to do so.
     

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