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Thread: added freon and no air.

  1. #1
    tony_svt is offline Cadillac Owners Member
    Automobile(s): STS 2002
    Join Date
    Oct 2012
    calexico, ca.

    added freon and no air.

    after added a can of freon to the car 2 days later dont have a/c

    scanned for codes and nothing from a/c system

    manually checked for freon from the valve and no freon present.

    maybe is stuck or is broke?

    i used a ezchill gbm-3cs to measure and before fill the freon in my side was warm air and in the pasanger side was cold, thats the reason i decide to test and fill.

    filled and work very good, 2 days excellent after that only warm air.

    i have this codes.

    when i bought my car, was a salvage car that dont start.
    i found the abs was the culpt cut the wires and search for a pig tail and abs pump, have the abs pump ready to install buth not the wires. i checked for a wire without protection in the area and all are right.

    i know most of the codes are for that abs module and no conection. there.

    ipc u1000
    pcm p1571
    pcm p1644
    pcm u1040
    rss c0635
    rss c0640
    rss c0710
    sdm u1000

    if somebody know a computer harness completelly or just the pigtail for a sts2002
    or when i can buy in ebay are rare or insane prices.

    returning to a/c problem

    i read the a/c system from the sts are 35oz of freon needed and 6oz of oil.

    is possible the compressor is broke or just orings?

    here where i live the heat are 40c min and 48c max

    calexico, ca.


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  3. #2
    ternstes is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS V, 2007 SRX V8, 2005 CTS 3.6L, 2000 STS, 1999 STS
    Join Date
    Nov 2008
    SW Ohio
    I would say you have an system leak. Take it to a shop and they can inject a fluorescent dye into the system that will tell them where the leaking connection or component is.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: added freon and no air.

    If you added refrigerant and it was cold for 2 days. then got warm, you have a leak in the system. DO NOT attempt to recharge it using refrigerant with a sealer in it.


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