Question about 1995 GMC Sonoma

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Air conditioner not working

Air conditioner is not work. The compressor will not engage. System seems to have freon in system.

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If your freon is full then check the low side pressure switch on the accumulator this could be open!

Posted on May 31, 2009

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1 Answer

I have a 2010 Hyundai Elantra and the A/C isn't blowing cold air. Compressor seems to be always engaged. I watched it for 10 minutes. Can someone tell me what the trouble could be please?


Have the A/C pressure tested, make sure the compressor is working even if the clutch is turning. Could be a bad compressor, not actually moving any freon. Also I have recovered freon from a system, and the freon was very low even showing good pressure and the compressor running but not cooling.

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Did you do all of the work yourself, including draining out the existing freon? Did you have the system vacuumed and tested for leaks prior to putting freon back in?

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You'll need to have a mechanic check the system to see if it is low on freon, or if you have an electrical problem.

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My air con is not working.it has gas in the system,relay is ok,air con switch is ok but the air con compressor does not turn on when air con is on.when you direct the compressor or brigde the relay,the...


You may have freon in system but compressor won't engage unless it's full under pressure. By jumping the the relay you're doing damage to compressor by running on low pressure. Have system evacuated and recharged to proper amount of freon - usually 4 lbs of freon

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Air conditioner compressor not turning on bought a new compressor last year it is full of freon/the new stuff


hopefully when they regassed it with the new freon they put dye in the system if the gas has leaked out somewhere slowly this will stop the compressor from working as the have a back pressure release valve, when the pressure isnt high enough the compressor will not engage. you may need to take it in to have them check the pressure in your system.

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2004 Jeep Grand Cherokee Laredo V8 air conditioner blows hot air. We can hear the the fan turning on. I am planning to replace the a/c system but what parts do I actually need?


FIRST CHECK TO SEE THAT THERE IS FREON IN SYSTEM OR COMPRESSOR WILL NOT ENGAGE MAY JUST NEED FREON WITH OIL IN IT.( WHEN YOU TURN ON A/C DOES CENTER PART OF COMPRESSOR START TO TURN)?

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1 Answer

Adding freon to the auto air conditioner, the


On that model,it will cycle on and off while you add freon.If it does not ,then the ac system might have a problem.The low side pressure switch is located on,or near the accumulator .Unplug the switch and take the wire end plug and connect the two plug in`s together(cross it out on the wire).This will make the ac compressor engage and you can charge the system,do not leave the wire connected,plug it back up to switch.If the ac compressor does not come on ,then have the system checked out.

Jul 23, 2009 | 1994 Chevrolet Camaro

3 Answers

Air conditioner compressor is not kicking on, system is fully charged


jumper the compressor cycling switch in the low side of the system and see it compressor kicks on, if it does replace that low side switch, please let me know.

Jun 23, 2009 | 1998 Pontiac Grand Am

1 Answer

Car full of freon, air conditioner still not cooling


Yes the system can be full of freon and yet not work, the pressure switch could faulty, the expansion valve too could be faulty, he drier receiver too.
On switching 'on' the AC , is the AC compressor workingor rather does it engage?
The AC compressor clutch too could be not functioning.
I guess you have to go step by step to check first if the AC compressor does rotate on switching 'on' the AC.

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1 Answer

Air conditioner is not cooling


Are you sure the compressor is engaging? It normally wont engage if the line pressure is to low(meaning the system is out of freon.)

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