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Discuss A/C Problem in the alt.trucks.chevy forum at Car Dealer Forums; I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c button ...
  1. #1
    Sid
    Guest

    Default A/C Problem

    I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c button the
    light on the recycle comes on also, even when its not pressed. The
    compressor comes on for a few seconds then shuts off. It does it repeatedly
    with no cold air coming from the vents. The compressor does the same thing
    when I use any setting past the floor setting.


    Sid





    › See More: A/C Problem

  2. #2
    Larry A.
    Guest

    Default Re: A/C Problem


    Sounds like you have a leak / need a charge. The compressor has a
    pressure switch which keeps the A/C compressor clutch from engaging
    when pressure is low, to prevent compressor damage. The main symptom
    is just as you noted - or, in the case of *really* low pressure, the
    clutch won't engage at all.

    - Larry A.

    On Tue, 25 Jul 2006 22:13:56 GMT, "Sid" <sid@vicious.com> wrote:

    >I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c button the
    >light on the recycle comes on also, even when its not pressed. The
    >compressor comes on for a few seconds then shuts off. It does it repeatedly
    >with no cold air coming from the vents. The compressor does the same thing
    >when I use any setting past the floor setting.
    >
    >
    >Sid
    >



  3. #3
    Sid
    Guest

    Default Re: A/C Problem

    I bought some 134a as recommended. I just want to make sure I'm doing this
    right. There are 2 connectors on the top, close to the compressor, is one
    of them where I recharge system?

    Sid


    "Larry A." <brillig1@bellsouth.net> wrote in message
    news:jvigc2l4noa7lanjkd0m78fj2f81b66s2t@4ax.com...
    |
    | Sounds like you have a leak / need a charge. The compressor has a
    | pressure switch which keeps the A/C compressor clutch from engaging
    | when pressure is low, to prevent compressor damage. The main symptom
    | is just as you noted - or, in the case of *really* low pressure, the
    | clutch won't engage at all.
    |
    | - Larry A.
    |
    | On Tue, 25 Jul 2006 22:13:56 GMT, "Sid" <sid@vicious.com> wrote:
    |
    | >I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c button
    the
    | >light on the recycle comes on also, even when its not pressed. The
    | >compressor comes on for a few seconds then shuts off. It does it
    repeatedly
    | >with no cold air coming from the vents. The compressor does the same
    thing
    | >when I use any setting past the floor setting.
    | >
    | >
    | >Sid
    | >
    |



  4. #4
    Larry A.
    Guest

    Default Re: A/C Problem

    Not familiar with your model, but you want to charge the LOW pressure
    fitting. Buy a Haynes manual if you're not sure. Run the A/C while
    you are doing it; if this is indeed the problem, after a can or so,
    the clutch should start picking up and the A/C pipes under the hood
    should get cold/frosty.

    Bear in mind that this does not address the issue of why your 134a
    leaked out. Typically this is dried-up seals in the compressor,
    from not being run enough in northern climates. This would require a
    compressor replacement. Just adding refrigerant is only a temporary
    fix, and will be satisfactory only in the event of a VERY slow leak.
    But you may get lucky!

    - Larry A.


    On Thu, 27 Jul 2006 18:43:06 GMT, "Sid" <sid@vicious.com> wrote:

    >I bought some 134a as recommended. I just want to make sure I'm doing this
    >right. There are 2 connectors on the top, close to the compressor, is one
    >of them where I recharge system?
    >
    >Sid
    >
    >
    >"Larry A." <brillig1@bellsouth.net> wrote in message
    >news:jvigc2l4noa7lanjkd0m78fj2f81b66s2t@4ax.com.. .
    >|
    >| Sounds like you have a leak / need a charge. The compressor has a
    >| pressure switch which keeps the A/C compressor clutch from engaging
    >| when pressure is low, to prevent compressor damage. The main symptom
    >| is just as you noted - or, in the case of *really* low pressure, the
    >| clutch won't engage at all.
    >|
    >| - Larry A.
    >|
    >| On Tue, 25 Jul 2006 22:13:56 GMT, "Sid" <sid@vicious.com> wrote:
    >|
    >| >I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c button
    >the
    >| >light on the recycle comes on also, even when its not pressed. The
    >| >compressor comes on for a few seconds then shuts off. It does it
    >repeatedly
    >| >with no cold air coming from the vents. The compressor does the same
    >thing
    >| >when I use any setting past the floor setting.
    >| >
    >| >
    >| >Sid
    >| >
    >|
    >



  5. #5
    Sid
    Guest

    Default Re: A/C Problem

    I will give it a try.
    Thanks
    Sid


    "Larry A." <brillig1@bellsouth.net> wrote in message
    news9llc2dtak1m6firrr5gj0asqc3v0d53da@4ax.com...
    | Not familiar with your model, but you want to charge the LOW pressure
    | fitting. Buy a Haynes manual if you're not sure. Run the A/C while
    | you are doing it; if this is indeed the problem, after a can or so,
    | the clutch should start picking up and the A/C pipes under the hood
    | should get cold/frosty.
    |
    | Bear in mind that this does not address the issue of why your 134a
    | leaked out. Typically this is dried-up seals in the compressor,
    | from not being run enough in northern climates. This would require a
    | compressor replacement. Just adding refrigerant is only a temporary
    | fix, and will be satisfactory only in the event of a VERY slow leak.
    | But you may get lucky!
    |
    | - Larry A.
    |
    |
    | On Thu, 27 Jul 2006 18:43:06 GMT, "Sid" <sid@vicious.com> wrote:
    |
    | >I bought some 134a as recommended. I just want to make sure I'm doing
    this
    | >right. There are 2 connectors on the top, close to the compressor, is
    one
    | >of them where I recharge system?
    | >
    | >Sid
    | >
    | >
    | >"Larry A." <brillig1@bellsouth.net> wrote in message
    | >news:jvigc2l4noa7lanjkd0m78fj2f81b66s2t@4ax.com.. .
    | >|
    | >| Sounds like you have a leak / need a charge. The compressor has a
    | >| pressure switch which keeps the A/C compressor clutch from engaging
    | >| when pressure is low, to prevent compressor damage. The main symptom
    | >| is just as you noted - or, in the case of *really* low pressure, the
    | >| clutch won't engage at all.
    | >|
    | >| - Larry A.
    | >|
    | >| On Tue, 25 Jul 2006 22:13:56 GMT, "Sid" <sid@vicious.com> wrote:
    | >|
    | >| >I have a 1998 1500 Silverado with 5.0 liter. When I push the a/c
    button
    | >the
    | >| >light on the recycle comes on also, even when its not pressed. The
    | >| >compressor comes on for a few seconds then shuts off. It does it
    | >repeatedly
    | >| >with no cold air coming from the vents. The compressor does the same
    | >thing
    | >| >when I use any setting past the floor setting.
    | >| >
    | >| >
    | >| >Sid
    | >| >
    | >|
    | >
    |
    |



  6. #6
    Garrett Fulton
    Guest

    Default Re: A/C Problem


    "none2u" <none2u@notrealatall.bye> wrote in message
    news:bPWdnYDzO5aqFkjZnZ2dnUVZ_u6dnZ2d@centurytel.n et...
    >I believe the low side is the side that goes from the condenser to the
    >evaporator, for non techies. the thing in front of the radiator into the
    >firewall.


    The line going from the condensor outlet to the evaporator inlet is the high
    side of the system. The evaporator outlet to the dryer/accumulator, then to
    the compressor is the low side.



  7. #7
    Sid
    Guest

    Default Re: A/C Problem

    What are the 2 inlets near the compressor?


    "Garrett Fulton" <lbfulton@alltel.net> wrote in message
    news:1b0fa$44d676cf$a2276345$8927@ALLTEL.NET...
    |
    | "none2u" <none2u@notrealatall.bye> wrote in message
    | news:bPWdnYDzO5aqFkjZnZ2dnUVZ_u6dnZ2d@centurytel.n et...
    | >I believe the low side is the side that goes from the condenser to the
    | >evaporator, for non techies. the thing in front of the radiator into the
    | >firewall.
    |
    | The line going from the condensor outlet to the evaporator inlet is the
    high
    | side of the system. The evaporator outlet to the dryer/accumulator, then
    to
    | the compressor is the low side.
    |
    |



  8. #8
    Garrett Fulton
    Guest

    Default Re: A/C Problem


    "Sid" <sid@vicious.com> wrote in message
    news:vH1Cg.2665$o27.1243@newssvr21.news.prodigy.co m...
    > What are the 2 inlets near the compressor?


    Sid, if you mean the inlets connected to the lines going to the compressor,
    one is the low pressure freon coming in from the evaporator. The other is
    hot high pressure freon going out to the condensor in front of your
    radiator. Best I can do without seeing your car.

    Garrett Fulton



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