Service A/c Light 4.9 '93 Sedan...

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HT4100 4.1, 4.5, 4.9 Discussion, Service A/c Light 4.9 '93 Sedan... in Cadillac Engine Discussion; 149k miles, Had issues with power steering leak. Was on highway and the pulley broke off and sheared the a/c ...
  1. #1
    GEE_RIDE is offline Cadillac Owners Member
    Automobile(s): 93 Sedan DeVille 4.9
    Join Date
    Feb 2014
    Columbus, Oh

    Service A/c Light 4.9 '93 Sedan...

    149k miles, Had issues with power steering leak. Was on highway and the pulley broke off and sheared the a/c line. Power steering problem has since been fixed. After fixing power steering problem, (Leak @ rack, and Pump and pulley replacement) i tried to use the defroster on a cold morning, Service A/C light came on in information center. I turned the defroster off an a few minutes later, ac light went off.... Do you think replacing the hose that was destroyed (but not leaking) could be a remedy? New belt was installed with pump and pulley. all was working fine until pulley broke.

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  3. #2
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
    Join Date
    Sep 2010
    East Boston MA.
    You have no refrigerant pressure in the system. If you pulled your codes, you'd get a code for low refrigerant pressure. That's what's triggering the message.

    You'll need tore place the hose and refill the system.

  4. #3
    delerium75's Avatar
    delerium75 is offline Cadillac Owners Fanatic
    Automobile(s): 1991 STS, 1992 Fleetwood, 1987 Maxima wagon
    Join Date
    May 2008
    Bay City, MI

    Re: Service A/c Light 4.9 '93 Sedan...

    It could even go a little deeper than that. If any debris got into the system when the pulley broke or from driving around, it could cause the compressor to fail as well. I believe the system can be flushed, which is probably what I would do if a hose broke. You'd probably need to replace the orifice tube and accumulator as well with it being open to the atmosphere.

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