Question about 2007 Chevrolet TrailBlazer SS

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My ac compressor is not workin well

Why does my ac compressor turns on and off while am parkin and the air is not cold its like fan air but when am drivin its great?

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  • Chevrolet Master
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You need to have your pressues check at lower rpms it sounds like your a/c compressor doesn't have enough of a charge to remove the heat from the air but at higher rpms it can because higher rpms means higher flow and higher pressure.

Posted on Jul 05, 2010

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03 grand am ac wont blow cold air


Two things are very likely to be your problem. Freon or compressor. Turn on the ac on cold and see if the compressor is engaging, if it is and stops and goes or if it doesn't. try to check the compression on the low side of your ac, the smallest plug where you service the ac. Or take it to an ac professional to get it refilled or checked. Remember, just because its blowing air, it doesn't mean its working. There are fans inside the car that push the cold air inside your vehicle and most of the time these will work, but that's not the only part required to blow cold air inside your car, the compressor is what makes the air cold.

Oct 09, 2014 | Cars & Trucks

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The ac compressor in my 2006 Chevrolet Silverado turns on and off while parked. It's blows really cold air while driving, but blows hot and cold air while parked. To hot to sit in truck while parked. ...


the problem is not the compressor but the head pressure is to high and the high pressure switch is shutting it off
You say really cold while driving but on/off when stationary
That indicates that the fan in front of the condenser is not working and the high pressure gas is not converting back to liquid
2 possible items to check
fan--fan relay fan relay fuse
and excessive gas in the system
take it to an accredited ac specialist shop and have the pressures checked
At this point I am thinking excessive gas

Feb 24, 2018 | Chevrolet Silverado Cars & Trucks

1 Answer

The compressor in my 2006 Chevrolet Silverado 2500 4x4 turns on and off while parked. It blows very cold air while driving, but blows hot and cold air while parked. To hot to sit in the truck while...


the ac system needs air through the condenser ( radiator bit in front of the radiator) to operate correctly. IT it has no air then the compressed gas is to hot and will not turn to liquid and so the high pressure switch turns of the ac compressor. No problem when you are moving as road speed provides the air flow. Get an electric fan and have it installed before the condenser and connect it to the ac compressor circuit so that it is running all the time you have the ac compressor running. not the local mechanic.When dealing with ac systems the best people to take it to is an accredited ac specialist shop

Aug 12, 2014 | Cars & Trucks

3 Answers

Screaming noise from ac no cold air


It sounds to me that your belt or tensioner is worn, if the noise goes away when the ac is off then it is just the belt slipping, it takes a lot of power to run the compressor and if the belt is worn it most likely slipping on the pully when you engage the clutch.

Aug 09, 2014 | 2000 Buick LeSabre

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The ac in my 2006 dodge 2500 gas engined truck does not blow cold when the engine is at idle. when running normal speeds the air gets cold


start by cleaning or replacing your in cabin air filter. check to see if your AC condenser fan is turning when the AC is turned on. Make sure the front of the radiator is not clogged with bugs, mud, etc. Check AC compressor relay-make sure the compressor clutch is turning the compressor with engine at idle. lastly check for proper refrigerant charge.

Oct 13, 2010 | 2006 Dodge Ram 2500

1 Answer

Why does my ac compressor turn off and on while am parkin also the air is not cold its like the air fan but when am drivin its great?


low on charge of r134a? Try adding a can to see if performance increases.

Try that intermatics 'Arctic Freeze' which has oil and sealant as well as a NASA created ingredient that makes the a/c get colder faster up to 50% better.

Jul 05, 2010 | 2007 Chevrolet TrailBlazer SS

2 Answers

1999 Alero: where is the a/c control tempature :problem is wh...


WELL TURN ON AC MAX COLD HIGH TO SEE IF COOLANT FANS TURN ON.IF NOT YOUR REFRIGERANT SO LOW THAT THE AC REFRIGERANT PRESSURE SENSOR WONT CLOSE CIRCUIT TO TURN ON COOLING FANS.MEANING YOU NEED HAVE AC CHECKED AND CHARGED.ALSO CHECK COMPRESSOR FOR POWER IF NOT YOU HAVE BLOWED FUSE OR BAD RELAY.IF FUSE AND RELAY GOOD YOUR AC COMPRESSOR CLUTCH COIL OPEN OR THE AC CONTROL SWITCH IS BAD.IF COMPRESSOR IS RUNNING WHEN YOU TURN ON AC YOUR AIR TEMPERATURE ACTUATOR NOT WORKING.

May 17, 2010 | 1999 Oldsmobile Alero

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No cold air


air doors stuck broke or not getting vacuum.

Apr 16, 2009 | 1998 GMC Jimmy

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