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  1. #11

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    Quote Originally Posted by zuper8 View Post
    Well, thank you everyone for the informative posts. It has helped me charge my other vehicle. However, the Suburban could not be helped, for when I turned on the AC and went to start putting in refrigerant (engine running of course), the compressor was not spinning :( Guess I have an expensive problem that won't be getting fixed any time soon
    Glad we could help.


    Did you take a pressure reading before you started the Sub? I'm pretty sure there is a cutout so the compressor won't come on if there is no pressure in the system. As you fill it and it reaches the required pressure, it will come on. If the system is flat empty, you probably (but not necessarily) have a good size leak. For example, I bought an 89 Chevy pickup 5 years ago. AC didn't work. Put two cans of R134 and drove it for 3 years. AC worked great. Never added any more.
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  2. #12
    Legend

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    Feb 2008
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    Red Wing, Minnesota, United States
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    3,356

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    So who knows exactly how the suburban system works? My rear air is ice cold, but my front air is warm. Last year I had to put about half a can in and it worked great all summer.
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
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  3. #13
    Legend unplugged's Avatar
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    Sep 2006
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    High Deserts of SoCal
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    2,554

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    Quote Originally Posted by zuper8 View Post
    Well, thank you everyone for the informative posts. It has helped me charge my other vehicle. However, the Suburban could not be helped, for when I turned on the AC and went to start putting in refrigerant (engine running of course), the compressor was not spinning :( Guess I have an expensive problem that won't be getting fixed any time soon
    There is also a low pressure switch that shuts the compressor down to prevent damage. You should be able to bypass it to get the compressor to run so you can add R134.
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