Question about 1993 Chevrolet K1500

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Air conditioning pump on my 1993 chevrolet pick up will not engage.The fuse is fine .What else should i do?

I have a 1993 Chevrolet pick up with a 5.7l engine. The clutch on the pump does not engage. I checked the fuse and it was fine, what else?

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  • westmichael3 May 28, 2009

    there is next to no pressure in the system. I bought some do it your self stuff from the local napa store and it wouldnt take it in. I thought maybe that the compressor needed to be pumping. i will try it again right now.

  • Samuel Charles Spriggs May 11, 2010

    If the system is low on refrigerant, the clutch will not engage.

    Have you checked refrigerant pressure?

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  • Master
  • 477 Answers

Some of the home refill kits are funny , you have to turn the screw in all the way to puncture the bbottle , but then you have to turn the screw out almost all the way to allow gas to flow from bottle. When filling , engine should be running , A/C turned on. As you fiss the system , compressor will start cycling off / on / off / , when you reach the desired pressure ( around 45 ) compressor should stay running. If there was no pressure in the system , you must have a leak somewhere , and refilling it will give you cold air only untill it leaks out again.

Posted on Jun 04, 2009

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Posted on Jan 02, 2017

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Air conditioning problem


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Ac is not blowing out cold air. You have to put gages on the system and it shows its has freon.Checked all fuses and relays. The two fans in engingine compartment do not come on when the ac is turned on but does when the engine gets hot. The compressor engages when turned on also.
If the magnetic clutch engages the compressor and still no cold air could be still low in freon or the HVAC unit.

Blower motor not working all the time...if I bang the dash near the glove box, it comes on then works great. Is this the switch assembly, the resistor problem, or should I be replacing the blower motor?


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.much@yahoo.comWhere is the air conditioning


Here is a copy of the serpentine diagram for your car. If you look at the second diagram it shows the location of the air conditioning compressor. The compressor will have to be one of the wheels for the serpentine belt. Not sure which engine you have. Here are the diagrams. Hope this helps.
http://www.2carpros.com/diagrams/chevrolet/beretta/1993

Aug 04, 2011 | 1993 Chevrolet Beretta

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.

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1 Answer

I HAVE A 93 CHEVY P/U 4.3L HAS A/C & P/S NO AIR PUMP. MY A/C COMPRESSOR LOCKED UP AND I DONT HAVE MONEY TO REPLACE IT CAN I JUST BUY THE BELT FOR NO A/C AND BYPASS THE A/C COMPRESSOR ?


This is what you are looking for. You can use your old belt. rockauto.com


1993 CHEVROLET K1500 PICKUP 4.3L 262cid V6 TBI (Z) OHV : Heat & Air Conditioning : A/C Compressor Bypass Pulley Wiki Price DORMAN Part # 34152 moreinfo2.png {#10118713} 34152-007.jpg $28.79 Add to Cart addtocart2.png

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make sure relay is grounded and check the relay for the air conditioning I know it seems weird but they are hooked up together in the wiring diagram

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1 Answer

The air conditioning on my 2004 Chevrolet silverado 2500 hd diesel quits working and begins blowing hot air.


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The compressor did not even engage when I turned on the air conditioning. It is blowing out warm air. I checked all fuses but did not know about the diode under the hood buy the fuses. What could be the...


You could have possibly lost all the r134a refrigerant from the system, and with no a/c pressure, the pressure sensor will not allow the compressor to engage, or you could have a faulty a/c pressure transducer (pressure sensor). Check your refrigerant charge first. If it is properly charged, then your pressure sensor could be the problem.

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