What is the RIGHT Freon for the AC? Can't find a solid answer.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Astralography, Jul 24, 2017.

  1. Astralography

    Astralography Junior Member

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    What is the RIGHT Freon for the AC? Can't find a solid answer. We are supposed to get R134A WITHOUT oil? Correct?
    But all of the stuff at the stores has additives that are oil based.


    This should be easy, why is this so confusing?


    Anyone know THE RIGHT STUFF?

     
  2. NutzAboutBolts

    NutzAboutBolts Senior Member

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    It's R134a, there is oil in the AC system, it's only a little bit only though. I don't trust those freon in a can from auto stores. I get mine vacuumed and recharged at a dealership or with a machine.
     
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  3. Hjeff

    Hjeff Junior Member

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    I was able to get 134a with no oil. It's been 2 months, and air is plenty cold. Without a vacuum/recharge, it is iffy getting the proper measure of refrigerant. If you are just adding some, look for the sight glass. It gives a pretty good indicator before overcharging.
     
  4. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Freon don't come pre oiled,
    You must add it separately.
     
  5. Ben Schneider

    Ben Schneider Junior Member

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    how many ounces of oil please ?
     
  6. ChapmanF

    ChapmanF Senior Member

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    Many consumer outlets do sell the stuff premixed with some oil, which is what the OP noticed that makes this complicated, because they will usually include the wrong kind of oil, which will damage the electric compressor.

    It is possible to buy consumer-size cans of R134a with no oil added; there are links all over PriusChat to those products. That's safer. The oil that is known safe for the compressor is Toyota's ND-11.

    The sight glass by itself is not a good guide to proper charge, because the car uses a subcooling condenser, with the effect that the sight glass bubbles will disappear when about 100 grams more of refrigerant are needed for the correct charge. The sight glass combined with a refrigerant scale, that's the ticket. (And the repair manual, because the exact conditions mentioned in the repair procedure matter when judging the amount of charge.)
     
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  7. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    ND11 oil for Prius air conditioners. And the system is totally intolerant of PAG oil. Don't use gauges or fill valves that have ever been used on a car that uses PAG oil for its AC. Cross-contamination is a major no-no.
     
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  8. Mendel Leisk

    Mendel Leisk Denizen of the LZ

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    I'm with @NutzAboutBolts on this: don't mess with it, take it to a Toyota dealership service department, if there's any problems. Let them check it out, and take the responsibility.
     
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  9. Ben Schneider

    Ben Schneider Junior Member

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    not sure the dealership is always taking responsibility

    i ordered this oil:

    Pep Boys
     
  10. Ben Schneider

    Ben Schneider Junior Member

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    oil
     

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  11. Ben Schneider

    Ben Schneider Junior Member

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    anyone know how to do the work ?
     
  12. padroo

    padroo Senior Member

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    I have done some A/C work but not on either of my Prii.
    Are you just adding some refrigerant or is the system totally empty?
    I can't tell what kind of top your oil has on it, there are oils meant to be poured into a system
    That is open to the atmosphere and oils that are injected into a sealed system. Same oil just a different can design.
    You will need a cheap thermometer to stick in your air vent also.
     
    #12 padroo, Mar 9, 2019
    Last edited: Mar 9, 2019
  13. ChapmanF

    ChapmanF Senior Member

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    I recommend the repair manual. There are details you probably don't want to be getting through hearsay and googling if you want a successful outcome.
     
  14. Lino

    Lino Member

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    It is R134a, and the oil they put in my car they labeled as Hybrid AC compressor oil, they had to purchase because they did not have it.
    The quantity they added was 2.5 ounces.
     
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  15. Ben Schneider

    Ben Schneider Junior Member

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    lino, much appreciated
     
  16. Ben Schneider

    Ben Schneider Junior Member

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    someone else mentioned this:

     
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