The compressor on the Ac system won't engage. I turn the ac on in the car but it does not send the power to the compressor is their a relay somewhere. I checked the power to the compressor but their was none and i checked all the fuses

Question 1

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1994 chevy k1500 ac compressor not getting power when i turn ac on

In a 1994 Chevy K1500, the compressor should receive power when the AC button is turned on, assuming that the system is adequately pressurized and there are no other issues preventing it from engaging. Here are some steps to diagnose the issue:

Check Refrigerant Levels: Low refrigerant levels can prevent the AC compressor from engaging. If your system is low on refrigerant, it may need to be recharged. This is typically a job for a qualified technician.
Check for Refrigerant Leaks: If your system is low on refrigerant, it's essential to check for leaks. A leak can cause the refrigerant to escape and prevent the compressor from engaging. Look for signs of oil or refrigerant leaks around the AC components.
Fuse and Relay Inspection: Ensure that the AC system's fuse and relay are functioning correctly. You can consult your vehicle's owner's manual or a fuse box diagram to locate the relevant fuses and relays. Replace any blown fuses or faulty relays.
Check the Pressure Switch: Many vehicles have a high-pressure and low-pressure switch in the AC system. These switches monitor the pressure in the system and can prevent the compressor from engaging if the pressure is too high or too low. Check these switches for proper operation and continuity.
Inspect Wiring and Connectors: Examine the wiring and connectors leading to the AC compressor. Look for damaged wires, loose connections, or corrosion. Ensure that there is no damage to the wiring harness.
AC Clutch and Compressor: If all the electrical components are working correctly, you may need to inspect the AC clutch and compressor itself. The AC clutch should engage and disengage when the AC is turned on and off. If the clutch isn't engaging, it may be faulty, or there could be an issue with the compressor itself.
Refrigerant Pressure Sensors: Some vehicles are equipped with refrigerant pressure sensors that can prevent the compressor from engaging if the pressure is out of the specified range. Check if your vehicle has such sensors and test them if necessary.
Professional Diagnosis: If you've checked all of the above and cannot identify the issue, or if you're uncomfortable working on AC systems, it's recommended to consult a qualified automotive technician or AC specialist for a thorough diagnosis and repair.

Remember to prioritize safety when working on your vehicle's AC system, as it involves high-pressure refrigerant and electrical components. If you're not experienced in automotive AC repairs, it's best to seek professional assistance to avoid injury or damage to your vehicle.

Sep 03, 2023 • AC Cars & Trucks

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97 chevy suburban AC clutch won't engage pressures

Looks like the low pressure switch gets power from a 10amp ac fuse. Power then goes to the ac relay which is powered on by the ac heat controller on the dash. Power then goes thru the high pressure switch to the compressor. The ac relay is grounded to the body. Do you have power on the lite and dark green wires going into the relay and is it grounded ?

Jul 26, 2013 • Cars & Trucks

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Have a 95 grand jeep chrokee limited 5.2 liter pcm will not ingauge AC clutch relay

the AC compressor has a "shutdown switch" when not enough refrigerant is in the system run a wire from the

run a wire from the + battery cable to the compressor pulley switch with the engine running, ac on if the compressor clucth engages (turns) you have low refrigerant charge

=

Feb 05, 2013 • 1995 Jeep Grand Cherokee

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Compressor on the ac system won't engage

The refrigerant may be low or empty. The compressor may be bad. You will need to have a mechanic check it out.

Sep 20, 2012 • 2002 Chevrolet Impala

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1answer

Pontiac Sunfire, AC works but compressor won't kick on.

pressure sensor on condenser

Sep 02, 2012 • 2005 Pontiac Sunfire

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1answer

AC compressor cuts in and out and won't stay engaged?

that means there is not enough pressure/refrigerant in the system. add a can of r134 and it may stop doing it

Aug 30, 2012 • 1993 Ford Ranger SuperCab

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1answer

2008 Honda Civic dx rebuilt AC compressor always on regardless of controls

OOPS ! Now, it sounds like the A/C relay is constantly on. In the power distribution box by the battery, try swapping another relay for the A/C relay (which turns the compressor on), and see if it now stops. If so, buy a new relay. Good luck.

Jul 12, 2012 • Honda Cars & Trucks

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1answer

My a/c compressor is only blowing hot air when I turn it on. I know a little about cars so I know it's the a/c but I am not able to find one on any site that may sell used or new.

If all you get is hot air there are several possibilities. The compressor is driven by the serpentine belt and is engaged and disengaged by an electric clutch mounted on the compressor drive pulley. With the engine running, have an assistant turn on the AC while you observe the AC compressor clutch. If the clutch engages, you can be reasonably sure that the system has freon, and the electric circuit is OK. If the clutch doesn't engage, which is the most likely situation, either you are low on freon, the AC clutch relay is inop, or AC compressor fuse is open (blown). A search of Google images will give you the location of the AC relay. You can pull out the relay, carefully remove the cover, reinsert the relay, and engage the compressor clutch by manually closing the relay contacts. Warning: do this only for a second or two in order to see the clutch engage. If the clutch does engage, then you are probably low on freon. There is a safety switch that prevents the clutch from operating if there is not enough freon in the system. Hopefully, this is the case. Go to Walmart and get two cans of r-134 and the inexpensive kit, and following their instructions, charge your system. If this is not the problem, you'll need a set of AC gauges and the skill to use them. Hope this helps. Dano

Aug 31, 2011 • 1998 Lexus Gs 400

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1answer

Air conditioning compressor on my 97 Chevy blazer won't engage. The AC is fully charged. The computer is not calling for AC from the switch.

#4 is compressor clutch relay...

You should also check LOW and High pressure switch(s)...

Aug 11, 2011 • 1997 Chevrolet Blazer

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2answers

AC Compressor not engaging on 2000 Chevy Impala. Fuses and AC relay okay. No power at compressor. Need wiring diagram. Also need to know if compressor requires 12v for operation. If not what should voltage...

When your R-134a runs too low it will NOT engage the compressor. You need to refill your a/c system before the clutch will engage, I also suggest finding the leak.

Apr 20, 2010 • 2000 Chevrolet Impala

Question 2

raj somaiya

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Posted on Jul 04, 2011

raj somaiya

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Its the problem related to faulty clutch or faulty clutch relay/.Its the compressor clutch that engage, and then the AC compressor starts running.If the clutch does not engage then compressor will not run. --------- Test the voltage at low pressure switch on the Freon line.If there is no voltage then problem relates to low pressure switch.By-pass this switch and see if that helps.-------

Cross over the brown and light blue wires at the low pressure switch and that should kick on the compressor and fan .So try this first.If by passing the switch turns on the compressor, then low pressure switch has to be replaced.--------
But if bypassing the low pressure switch does not helps, then problem is AC compressor clutch or faulty clutch relay.Yes there is a relay. The A/C relay is ECM controlled to delay A/C clutch engagement 0.3 seconds after A/C is turned "ON." This allows the IAC to adjust engine speed before the A/C clutch engages. The ECM also causes the relay to disengage the A/C clutch during WOT operation. The A/C relay is energized when the ECM provides a ground path for CIRCUIT 366.

----------- Also try this, applied direct battery voltage to the green terminal on the compressor and the clutch should engage.If its not engaging then its clutch issue.-------- You will have to follow the wiring diagram and test the relay, compressor and clutch.------Click this link below, it has all wiring diagrams to be followed. ----------- http://technoanswers.blogspot.com/2011/07/ac-compressor-clutch-not-engaging-on.html ---------- This should help.Thanks.Helpmech.

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The compressor on the Ac system won't engage. I turn the ac on in the car but it does not send the power to the compressor is their a relay somewhere. I checked the power to the compressor but their was none and i checked all the fuses

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raj somaiya

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1994 chevy k1500 ac compressor not getting power when i turn ac on

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The compressor on the Ac system won't engage. I turn the ac on in the car but it does not send the power to the compressor is their a relay somewhere. I checked the power to the compressor but their was none and i checked all the fuses

1 Answer

raj somaiya

Add Your Answer

Attachments: Added items

Related Questions:

1994 chevy k1500 ac compressor not getting power when i turn ac on

97 chevy suburban AC clutch won't engage pressures

Have a 95 grand jeep chrokee limited 5.2 liter pcm will not ingauge AC clutch relay

Compressor on the ac system won't engage

Pontiac Sunfire, AC works but compressor won't kick on.

AC compressor cuts in and out and won't stay engaged?

2008 Honda Civic dx rebuilt AC compressor always on regardless of controls

My a/c compressor is only blowing hot air when I turn it on. I know a little about cars so I know it's the a/c but I am not able to find one on any site that may sell used or new.

Air conditioning compressor on my 97 Chevy blazer won't engage. The AC is fully charged. The computer is not calling for AC from the switch.

AC Compressor not engaging on 2000 Chevy Impala. Fuses and AC relay okay. No power at compressor. Need wiring diagram. Also need to know if compressor requires 12v for operation. If not what should voltage...

Not finding what you are looking for?

1994 Cutlass Ciera

1994 chevy k1500 ac compressor not getting power when i turn ac on

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