Question about Whirlwind FH-778 Air Conditioner

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How do I add freon to my window air conditioning unit?

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  • sandeeportal Jun 25, 2009

    well, I have called several places but they only do central air conditioning so I guess I am going to have to get a new air conditioner and create more waste by dumping out my old one - what a waste! (thought I could reuse, reduce and recycle)



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My advise call a tech.

EPA performs random inspections in response to citizen tips pursuing potential cases against violators. The EPA is authorized to assess fines of up to $32,500 per day for any violation of the Clean Act regulations.

Always take a wise decision.


Posted on Jun 25, 2009

  • taran_2005
    taran_2005 Jun 25, 2009


    Still if you want to know procedure :-

    First you need to be EPA certified. You need to know what kind of
    refrigerant. [ R22 R143a etc. ] On a home system a good set of gauges
    and connect properly on a 22 unit low side is blue, suction line is
    larger in size pipe. High side red smaller diameter. Connect both hoses
    check pressures if their is no reading the compressor is not running.
    If compressor is running on a 22 unit the high side red should be 225
    to 275 should not go above 350 psi or it will cause damage your unit
    more or cause a rupture low side should be from 60 psi to 80 psi don't
    go any higher to much freon is no good and will cause higher temp. Be
    careful because were talking high pressures you should have a certified
    tech. do this if you add freon you must have a leak it dose not
    evaporate their is no winter summer freon its a sealed system and
    should never need refrigerant.

    You can add freon to the low side of your a/c. When the gauges are
    attached to the system, you can use the third hose to attach to the
    freon can. Make sure you leave the can upright so as to add only the
    gas. Don't turn the freon can upside down to add liquid as this can
    lock up the compressor and then you will have to call the a/c guy out
    to fleece your wallet.

    Detailed procedure is :-

    Any further help, let me know.

    Hope i helped you.

    Thanks for using "Fixya".



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Posted on Jan 02, 2017

  • 56 Answers

SOURCE: air conditioner needs freon

If the system runs you will first need to add freon to the system (make sure it the right freon) Just enough to find leak. After you find leak and repair evacuate the entire system and weigh in charge. Hope this helps.

Posted on Feb 12, 2009

  • 1524 Answers

SOURCE: how to refill home air condition with freon

Call someone who is "Certified"

Posted on Jun 07, 2009

  • 340 Answers

SOURCE: How to add Freon R407C to a ductless air conditioning unit

If you are not trained to at least charge a unit U will in the end do more harm than good get the proper service. what makes U think U need freon could just be dirty? Tom

Posted on Jul 12, 2009

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