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.

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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...


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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.

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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.

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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.

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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.

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AIR CONDITIONER QUIT WORKING


Pop the hood, start the vehicle and turn the AC on. Watch the compressor, it should have a center that rotates on an off and you should hear a clicking sound. This is the compressor clutch you are looking at. If the compressor is not doing this, check the fuses for the AC. If the fuses are good, then most likely the high side sensor switch is not working, therefore the clutch never engages and the air never gets cold.

Try that and get back to me, ok?

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air doors stuck broke or not getting vacuum.

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