Problem with A/C system. - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-03-2003, 07:41 PM   #21
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I can make the temp go from cold to hot by twisting the temp ****, while the system is in off position.
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Old 10-03-2003, 07:53 PM   #22
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u cant tell if the compressor is runnig all the time cuz u can hear it when it kick in an out its like a strain on the engine?
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Old 10-04-2003, 01:12 AM   #23
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Every single GM car that I have had will adjust the temperature of the air coming through the vents even though the system is off. Even the electronic climate controls will do that. However, the compressor will not operate.
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Old 10-04-2003, 10:33 PM   #24
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I have come to the conclusion that this is a normal aspect of my car. Many people seem to think that it is, and I will agree with them.
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Old 10-04-2003, 11:01 PM   #25
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Quote:
Originally Posted by fuddyduddy121
Every single GM car that I have had will adjust the temperature of the air coming through the vents even though the system is off. Even the electronic climate controls will do that. However, the compressor will not operate.
Yes it will. If I could send you the diagram, it would clearly show that the air will flow to the defrost and marginally to the floor because of the designed amount of default door opening. I think your system is working as designed (I didn't say right though).
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Old 10-06-2003, 01:21 PM   #26
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Quote:
Originally Posted by fuddyduddy121
Every single GM car that I have had will adjust the temperature of the air coming through the vents even though the system is off. Even the electronic climate controls will do that. However, the compressor will not operate.
Yes, there'* a vacuum feed to the temperature control (I'm oversimplifying here for the electronic controls) which is used to open and close the heater valve on the inlet hose to the heater core under the hood. That is, not only do you have temperature mixing doors in the dash which affect the temperature of the air being blown through the ducts, but also you have a valve in the heater hose that'* vacuum-operated to turn the coolant flow on and off.

So even when you have the blower off, the vacuum line can still open and close the heater hose valve, for what it'* worth. With the ducts closed and the blower off, you shouldn't get much if any hot air coming through anyway, but to be double sure about it, you can move the temperature setting to Cold as well.
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Old 10-06-2003, 05:42 PM   #27
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Don't know if this falls under the same category but my AC system (94 se) has been givin me issues starting up the compressor. Have'n a had time diagnosing this one.

If the AC is turned on the car will engage the compressor for approw 1 sec and then disengage for 3 sec and so on.
The compressor seems to turn fine when engaged so where could the problem be? in the car or in the compressor?

Any input would be helpful
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Old 10-06-2003, 06:00 PM   #28
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Likely low R-134a charge.
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Old 10-07-2003, 06:44 PM   #29
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Really???

So I just need to get the system charged?
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Old 10-07-2003, 09:05 PM   #30
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Probably - the A/C shop should start with a pressure check first to see if all is well, then recharge it if all is well.
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