AC problems, line looks iced up. Blows cold but not %100

Discussion in 'Questions From New Drivers' started by Chicago123456, Aug 25, 2021.

  1. Chicago123456

    Chicago123456 Light Load Member

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    Nov 27, 2020
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    one of my AC lines looks iced up. the AC blows but not 100%. you know what might be the problem ?
     

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  3. Arctic_fox

    Arctic_fox Heavy Load Member

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    Sep 16, 2016
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    Likely low on freon or a damaged compressor. Check the freon level first its the cheapest and easiest fix. My ram did the same thing when it got down to about half a charge and a recharge solved the problem.
     
  4. Chicago123456

    Chicago123456 Light Load Member

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    Nov 27, 2020
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    if I lose freon then it could be leak in the system ...not sure charging will help in the long run ?
     
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  5. God prefers Diesels

    God prefers Diesels Road Train Member

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    South Texas
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    You'll likely know there's a leak when you pull a vacuum.

    Low flow points to frozen evaporator coils. So they're either dirty and not letting enough air pass through so they freeze, or you're low on freon and it's freezing.

    If you're evaporator is clean, pull a vacuum.

    If @Rideandrepair gets on, he's strong in this department.
     
    Dino soar and Rideandrepair Thank this.
  6. Inderjit

    Inderjit Medium Load Member

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    Sep 17, 2017
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    The line that is ice is on is the low pressure side of the A/C system.
    Just above the iced part of the line is a rubber section that normally
    starts life with a reflective sleeve on it. The rubber line is very close
    to the exhaust manifold and and is prone to leaking over time. I have
    replaced quite a few. Get the shop to run the leak detector over it to
    see if there is a slow leak there before adding refrigerant.
     
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  7. Inderjit

    Inderjit Medium Load Member

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    Sep 17, 2017
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    I have been working on mobile A/C systems for over 40 years.
    I always wondered why people thought their A/C system would
    have Freon in them. Freon would be a very inefficient refrigerant to
    say the least. Most A/C systems are filled with R134a also known
    as 1,1,1,2-tetrafluoroethane. With a little internet searching I found
    that there is a company called Freon that has been making refrigerant
    gasses for decades. I guess the canisters had the name Freon on
    them and people assumed that was what was in them.

    Freon™ Refrigerants
     
  8. Frank Speak

    Frank Speak Road Train Member

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    May 3, 2016
    Hot Springs, AR
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    This is referred to as marketing nirvana in the corporate world. It’s every company’s dream to have their product referred to in a general sense.

    How many times have you heard someone ask for a “Kleenex” knowing they’re not literally asking for that brand. They just want a tissue. Another one is Charmin TP. Yet another is Coke. Those are just a couple of examples. There are a bunch.

    p.s. my hunch is IPhone isn’t far from this status.
     
  9. Rideandrepair

    Rideandrepair Road Train Member

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    Aug 8, 2015
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    Without gauges and a vacuum pump, it’s all guessing. I’ve fixed my Own over the years, just guessing. Only recently, getting gauges and a vacuum pump. Without the proper tools, You can try adding some 134a with dye in it. They sell a 3oz can of dye/134a I believe. Using the cheap hose they sell with a low side guage, you can add it, and tell if the low sides too high. It it’s too high, chances are the expansion valve, or orifice, depending on what the Truck uses, both do the same thing. They can fail, from debris, or moisture freezing in the system. If it’s low, adding the dye will help find a leak. Mines running now 12 Oz low, and it’s icing up the same way just a bit. Might just be your problem. Might just have a very slow leak at compressor behind the clutch. That’s common, adding a can or 2, buys time, till the leak gets worse.
     
  10. Ridgeline

    Ridgeline Road Train Member

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    Dec 18, 2011
    Michigan
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    Omg …

    only one person pointed to the REAL PROBLEM

    this is the reason why you get a frozen a/c line.

    A lack of questions from you guys … well … let’s start with this one …
    DID YOU CHANGE YOUR CABIN FILTER?

    this is the biggest cause for a freezing evaporator.

    If you have a truck without one, then chances are you need to get access to it and clean it (and the heater core) of the debris it has accumulated.

    While you are in the cleaning mode, clean the condenser and radiator.
     
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