Question about 1997 Cadillac DeVille

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My car is reading refridgerant very low-compressor is off.i tried to add free-on but it would not accept,and the compressor wouldn't kick on like normal

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The magnetic clutch or the relay is at fault

Posted on May 03, 2010

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1 Answer

My air conditioner is blowing hot air, where is the port so that I can add refridgerant?


The charging port is located in the larger of the two hoses/lines that come from the AC compressor, the fill port will accept only the right fitting from the charging source hose fitting. Before you add refrigerant you need to locate the leak, the refrigerant doesn't just disappear, it leaks out somewhere.. My guess would be the AC compressor front seal.

Jun 30, 2016 | 2004 Hyundai Santa Fe

1 Answer

On my 2004 gmc sierra 1500 the compressor cycles on and off. i tried to add more freon but it would not take the freon so i changed the low pressure switch but still doing the same thing. could the orfice...


When the compressor kicks on, is the air from the vents blowing cold? If the air isn't blowing cold, then your problem could be that you may have water in the system. I had a '93 Chevy Z71 that wouldn't blow cold and thats what my problem was. System needs to be evacuated and refilled. Good luck bro.

Aug 14, 2012 | 2004 GMC Sierra

1 Answer

2003 Pontiac GT1 3.4


Not exactly.
The compressor can run until it begins to freeze up depending on the system, or until pressure readings get too high or too low.
Most cars today are designed to run the compressor as long as the switch is engaged and just add hot air from the heater to adjust cabin temp. There is a sensor in the evap to prevent the system from freezing up.
As long as it is warm outside and the system is not freezing up then yes the compressor will run constantly.

Jul 04, 2012 | Cars & Trucks

1 Answer

AC compressor won't engage clutch


Lots of things can cause this, I will list them, easiest first.

A blown fuse or relay can prevent the clutch from kicking in. Low refridgerant charge will also do this, the low pressure switch will prevent the clutch from engaging when there is low refrigerant to prevent damage. You may need to put more in, and you also may need to jump the low pressure switch to get the compressor going to add more in. Very rarely the controls could have gone bad, which are the buttons on the dash. Id check out the fuses, relays, and pressure in the system first. A shop may even do a free diagnosis for you.

Jun 17, 2011 | 2002 Ford Escort

1 Answer

My AC is having trouble. It seems to only work once out of every 50 times I have tried to run it. I checked the freon with a AC gauge I bought and followed the instructions and it said the levels were up...


Hi, first of all, you will want to verify that your compressor is kicking on. Open hood and located A/C compressor. Have a helper start the engine and and then turn on A/C to maximum with blower at full speed. See if you hear and observe the compressor kick on. The outer portion of the compressor outside the pulley is the clutch. It should make a click and begin to spin along with the pulley. If it kicks on ok, does your cooling fan at the radiator kick on also? May need to run the engine a few minutes to verify that. If so and you are reading a full charge at the low pressure port at this time, you have air in the system and it should be completely emptied and then re-filled with around 3 LBS of R134a refrigerant until you read a low pressure side of 45-50 PSI. Then you will be blowing cold air.
Please rate this answer! Thanks, Mike

Jun 14, 2011 | 1999 Jeep Cherokee

1 Answer

Air conditioner blows hot air. will not accept coolant


Sounds like a bad compressor. If you have manifold gauges and the necessary tools (like a vacuum pump, Refridgerant, etc.) you can draw down the system and re-charge. But first I would take a high and low side reading to see if all is well with that compressor.

Mar 21, 2011 | 2004 Hyundai XG350

1 Answer

A/c not working, I replaced the relay, clutch won't kick in


this is caused almost always by a low charge of refridgerant due to a leak, since the compressor is only turned on when certain system prssures are meant the low charge keeps it from engaging, have the leak diagnosed and recharge.

Jul 08, 2010 | 2001 Dodge Intrepid

1 Answer

Air conditioning problems...air flow nothing cool


You need to double check the refridgerant charge - system holds anywhere from 2 1/2 to 3 pounds of R134a refridgerant. If you are sure refridgerant charge is correct I suspect it is a low side pressure cycling switch problem. Located on the passanger side towards the back of the engine on the silver accumulator - unplug connector; jump the two terminals together - if a/c compressor clutch comes on and stays on replace the switch.

Aug 02, 2009 | 2000 Cadillac Escalade

1 Answer

No a/c in 04 grand am


the common cause of this is the system has a refridgerent leak and the charge is low, when the charge is low the system will not engage the compressor.repair the leak evacuate the air and recharge the system

Jun 17, 2009 | 2004 Pontiac Grand Am

1 Answer

Ac won't blow cold air have to jump it to kick compressor on. Anyone know the problem


If you are jumpering the a/c cycling switch to kick the compressor on, you are likely low on freon. Get a a/c kit with a gauge on it to add a can of freon. Add about half a can and see if it starts cycling on and off. And, make sure the gauge reads in the "good" range. Then add some more. Make sure it does no go outside safe range.
When full, it should cycle on and off 4 to 7 times/minute at 70 degrees F.
You may have a slight leak.

report progress.

Jun 08, 2009 | 1998 Ford Mustang

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