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Gmc safari air conditioning compressor does not engage.

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  • Cars & Trucks Master
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Have the system checked for a leaking compressor, it sounds like you have lost the charge of refridgrent.

Posted on Jul 16, 2013

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Posted on Jan 02, 2017

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SOURCE: Air conditioning compressor not getting power on 96 Chevy Tahoe

Freon is what you are missing, our more specificly a refigerant charge that exceeds 45psi on the low side pressure line. This system has two pressure switches, a high side cut-out switch mounted on the rear of the compressor, and a low side or pressure cycling switch on the suction line.
Jump the low side switch contacts to ensure the electronics are sound for this system. If the compressor cycles, you know the system is low on a refrigerant charge. Turning on the AC is a request, and certain criteria must be met before the system operates as designed. Good luck

Posted on Mar 12, 2010

  • 131 Answers

SOURCE: A/C - compressor clutch won't engage

Your A/C system has a pressure sensor. If the system needs recharged, the compressor will not engage.

Posted on Jul 06, 2008

SOURCE: Air-conditioning problems

no hace cambio

Posted on Sep 11, 2008

  • 5 Answers

SOURCE: 1999 gmc safari van upper vent

Check under the hood for deteriorated small vacuum hose coming off the intake over to the heater box area.
Repair the vacuum hose.

Posted on Oct 31, 2008

iadame
  • 676 Answers

SOURCE: Air conditioning

As much as you probably don't want to hear it, I believe it is time to replace the a/c compressor. Be sure to change the orifice tube while you are at it. The compressor should take approximately 8 ounces pf pag 150 and about 32 ounces of freon.

Posted on May 08, 2009

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1 Answer

2002 gmc safari van defrost blow cold, a/c blow out of defrost


open the hood and check for leak on any plastic vacuum lines.

Oct 19, 2012 | 2002 GMC Safari

1 Answer

I have a 1993 Chevy S-10 4.3L automatic. The heat won't shut off. It pours out regardless of the position of the climate controls. Coolant level and condition good. AC would work but. Thanks.


#46-12-03: AIR CONDITIONER BLOWS WARM AIR (REPLACE A/C DELAY RELAY) - (Apr 7, 1994) 999999995.gif REVISION: 04/14/94
THIS BULLETIN IS BEING REVISED TO CORRECT THE TRANSMISSION LISTED IN THE MODELS. ----------------------------------------------------------------------
SUBJECT: AIR CONDITIONER BLOWS WARM AIR (REPLACE A/C DELAY RELAY)
MODELS: 1994 CHEVROLET AND GMC TRUCK S/T PICKUP WITH 4.3 ENGINE (VIN Z - RPO LB4), 4L60E TRANSMISSION (M30) AND AIR CONDITIONER/MANUAL CONTROLS (C60); OR 4.3 ENGINE (VIN W - RPO L35) AND A/C (C60)
BUILT BEFORE THE FOLLOWING VIN BREAKPOINTS:
PLANT DIVISION VIN LINDEN GMC RK501034 SHREVEPORT GMC R8501199 SHREVEPORT CHEVROLET R8105893 LINDEN CHEVROLET RK103097
CONDITION:
SOME OWNERS MAY EXPERIENCE A CONDITION WHERE THE AIR CONDITIONER IS TURNED ON AND DELIVERS ONLY WARM AIR.
CAUSE:
THE AIR CONDITIONER COMPRESSOR MAY DELAY LONGER THAN THE "ORIGINAL DESIGN" INTENDED 12 SECONDS, OR MAY NOT ENGAGE, DUE TO THE POSSIBLE MALFUNCTION OF THE COMPRESSOR DELAY RELAY.
CORRECTION:
TRUCKS BUILT BEFORE THE VIN BREAKPOINTS LISTED ABOVE MAY NEED A NEW AIR CONDITIONER DELAY RELAY. REPLACE ONLY WITH 15990540 AIR CONDITIONER COMPRESSOR DELAY RELAY. SPECIFIED PROCEDURE IN SERVICE MANUAL NATP 9429, PAGE 1B-59. TEST AIR CONDITIONER OPERATION FOR DELIVERY OF COOL AIR.
NOTE:TO TEST FOR PROPER OPERATION, PUT THE A/C CONTROL ON THE "OFF" POSITION, START THE ENGINE, THEN PLACE THE A/C CONTROL IN THE "ON" POSITION. THIS SEQUENCE WILL PROVIDE IMMEDIATE ENGAGEMENT OF THE AIR CONDITIONER COMPRESSOR. WHEN THE ENGINE IS STARTED WITH THE A/C CONTROL ALREADY "ON", THERE WILL BE A NORMAL 15.0 SECOND DELAY FOR THE AIR CONDITIONER TO ENGAGE.
SERVICE PARTS INFORMATION:
P/N DESCRIPTION QTY
15990540 A/C COMPRESSOR DELAY RELAY 1
PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

Jul 29, 2011 | 1994 Chevrolet S-10 Blazer

1 Answer

My GMC Sierra's air conditioning works great but the driver side vents will spontaneousely start blasting out hot air. The passenger side continuse to blow cold air. If iI turn the truck off and...


  1. Air conditioner system is discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

May 24, 2011 | 2005 GMC Sierra

1 Answer

I just put in freon and now it wont give out cool air


Is the compressor engaging and did it engage before adding freon?
What is the pressure on the gauge for the low side? 25psi to 45 psi is normal when the engine is running and the compressor is turning.

If the compressor is not turning the pressure should read 75psi to 100psi, before the compressor starts turning.

Also, the radiator fan should go on when you engage the air conditioning by turning it up to max.

Jul 04, 2010 | 1999 GMC Yukon

1 Answer

My 1997 gmc safari is not blowing cold air. is it something that i can fix myself?


Yes if it is just low refrigerant. If your compressor is still cycling on and off and the air is a little colder when the a/c is on then it is probably just low. You can get the refrigerant at your local auto parts store. If your compressor is not running you many have more serious probelms. If you look around some places will do free or low cost ( about $25.00) inspections.

Jul 06, 2009 | 1997 GMC Safari

1 Answer

A/C Compressor Question


Try grounding the LOW PRESSURE A/C SWITCH by the compressor, while trying to recharge. This will energize the compressor. Hope this helps.

May 08, 2009 | 1994 GMC Safari

2 Answers

Air conditioning


As much as you probably don't want to hear it, I believe it is time to replace the a/c compressor. Be sure to change the orifice tube while you are at it. The compressor should take approximately 8 ounces pf pag 150 and about 32 ounces of freon.

May 08, 2009 | 1998 GMC Safari

1 Answer

1999 Gmc Safari Air Conditioning We thought the air conditioning was out of gas but the guage shows full. It is still blowing regular air instead of cold. We bought another can and the guage for that can...


it could be the A/C compression switch and here is a place that sells only GM parts Schram auto and truck parts 1-800-292-1032 and for diagrams pictures and step by step instructions to replace it try autozone.com or your local library

Mar 20, 2009 | 1999 GMC Safari

1 Answer

1999 gmc safari van upper vent


Check under the hood for deteriorated small vacuum hose coming off the intake over to the heater box area.
Repair the vacuum hose.

Oct 21, 2008 | 1999 GMC Safari

1 Answer

A\c


If you can locate the compressor under the hood, have someone turn the AC off and on while you watch the front of the compressor; this is where the clutch is located, and see if the clutch is engaging.
If it is, you should see a stationary part of it instantly click on and the belt on the idler should now be turning the formerly stationary part behind it.
It may take a couple of tries before you see what action is taking place.

If it is engaging and releasing, I would encourage you to locate an honest shop and have them check for system pressure. You may just have a low coolant condition easily solved.

If it is too far down, they should check for leaks after charging the system again.
This takes a special detector.

If you want to wing it and try it yourself first, you can buy a recharging kit with a gauge for ~$20 US that will include instructions on where to connect it to the system and what pressure is correct. The pressure is somewhat dependent on ambient temperature.

The coolant is available in two forms; one has a lubricant and some protective chemicals that are injected with the coolant (via the kit) and the other is straight coolant.
With your vehicle having 14 years of service, I would first use the complete refrigerant with additives.

DON'T exceed the recommended pressure since this can cause damage to the system or a constant cycling of clutch due to overpressure.

Jul 03, 2008 | 1994 GMC Safari

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