Question about 2003 Chevrolet Silverado 1500

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A/C will not blow cold. I tryed adding refridge

A/C will not blow cold. I tryed adding refridge but the compressor suction pressure was at 75psi. I can hear the compressor try to kick on every 30 seconds or so.

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  • Chevrolet Master
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It will take it a while ,until the compressor starts staying engaged long enough to **** the freon in faster.

Posted on Jul 10, 2010

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2 Answers

Air conditioner blowing cold when driving, but blowing hot air when not driving


Multiple possible problems, low freon, imprope install of serpentine belt, or more likely suction hose collapse due to faulty part design. If freon low pressure between 45~55 pounds pressure and serpentine belt properly routed around idler pully between compressor and alternator, then suspect suction line collapse which literally starves the compressor at idle and constricts the compressor at all speeds.

The fix, is to toss your existing suction hose and buy one of these custom modified hoses: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=181880844799


air-conditioner-blowing-cold-when-4bu5ixkyfekajo5xeekgefn0-4-0.jpg Look on eBay for KIA OEM suction hose pics and visually compare, this revision totally eliminates kinking and collapse.

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I do not get any cold air from AC vents. I believe that I overcharged the system by adding from a can that had a faulty pressure guage. The AC was working even after I had overcharged it. After...


You need to have a repair shop fix the problems
you put in there, from trying to work on an
A/C system without proper knowledge or equipment

Sep 02, 2013 | 2005 Audi A6

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Problem with a/c put new compresser and everything with new kit the a/c is still not cold as it should be. the suction side reads about 36 or 37 , the chart says at 90 degrees the suction side should be...


the expansion valve ,it has a built in thermostat --- well sort of thermostat and this packs up leaving the valve in the open position ,result no pressure build up in the compressor which causes low vacumn in the low pressure side

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3 Answers

A/c not blowing cold air


80lbs on the low side is WAY too much if the clutch is running, the high side you should see 125-150ish, the low 30-40. I would feel the lines (the bigger line going into the firewall to see if it is cold when your pressure is right) if so suspect a blend door motor which controls the hot and cold switching inside.

Jul 24, 2010 | 1999 Chevrolet Venture

1 Answer

I just put in freon and now it wont give out cool air


Is the compressor engaging and did it engage before adding freon?
What is the pressure on the gauge for the low side? 25psi to 45 psi is normal when the engine is running and the compressor is turning.

If the compressor is not turning the pressure should read 75psi to 100psi, before the compressor starts turning.

Also, the radiator fan should go on when you engage the air conditioning by turning it up to max.

Jul 04, 2010 | 1999 GMC Yukon

1 Answer

My air condition want' blow out cold air i try


If your car is more than a few years old, it probably has a leak or a worn compressor. You can add too much freon for the system. It needs to be vacuumed down to a negative pressure before adding freon, and then checked for compressor function and leaks. You may need to take it in to a reputable shop.

Apr 08, 2010 | 2002 Chevrolet Monte Carlo

1 Answer

Air condition blows hot air but it has freon


You may have created an over charged condition and at this point the a/c compressor will cut off on high head pressures. This can be verified by installing gauges to the systems high and low side service taps and reading the pressures.An overcharged system will start the compressor briefly but soon cuts off once pressure goes to 350 - 400 lbs on the high side. Acceptable pressures for this system should be no greater than 250 high and low suction should drop to 40-50 psi.You might recover the charge and evacuate the system,then try bringing the charge back to proper level.A sight glass in the reciever drier really helps determining proper fill.Once all bubbles have dissipated from the sight glass during charging ,one should stop at that point to avoid overfilling.Too much freon is worse than a low charge especially in hot ambient conditions....

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1 Answer

2000 chevy tahoe air conditioning blowing warm air


probably a leak.

what are your high and low side pressures?

Aug 01, 2009 | 1996 Chevrolet Tahoe

1 Answer

A/c for honda 2000 blows cold but has erratic high pressure readings very high and very low readings on low side


evacuate system and refill to proper spec for r13a refridgent may not have proper levels. check cooling fan opperation with engine running cooling fan should be opperating while a/c compressor is engaged. if all theese check out good has blockage in system

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2 Answers

96 Tahoe no Cold Air


YOU NEED 28 PSI ON LOW SIDE AND ABOUT 190 ON HIGH SIDE.YOUR REFRIGERANT IS LOW THAT WHY COMPRESSOR CYCLING ON AND OFF.

Jul 22, 2009 | 1996 Chevrolet Tahoe

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