Question about 1996 Jeep Grand Cherokee

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A/c problems A/c stopped blowing cold air so i went and bought a recharge kit it was low so i recharged the system back to about 35 psi but the air is still blowing hot.the compressor is cycling but the line that runs between the compressor and the evaporator isnt cold or sweating. is a orfice stoped up or maybe the low pressure valve isnt working? can you help?

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  • yadayada
    yadayada May 11, 2010

    First, were did the old charge go??? How do you know you put in the correct amount?? The orifice will not cause this concern unless you removed it.

  • Anonymous Mar 17, 2014

    Replaced A/C compressor, discharge line/with orifice tube Vacuumed system, recharged 134A. Low side press. 41 psi. High side 152 psi. cold A/C! 2 days later blowing cold,boom blowing hot! Check pressures, low 60+ - high 170?

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Check the dryer maybe its blocked

Posted on Aug 14, 2008

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A/c blowing hot air with low pressure


The first thing to do would be go to your local auto parts store and buy an air conditioning recharge kit. Provided your vehicle isn't too old, they sell recharge kits that require no tools.

If their is a leak anywhere while you recharge, you will know.

Try recharging the air conditioning first, it is very simple and the kits come with simple instructions.

If there are no leaks, your A\C will blow cold air again. As for the pressure, if it continues to slightly blow air you may be looking at a new air compressor unit or a vaccum line. A new unit will run you anywhere from $200-$2000 dollars plus labor depending on the vehicle.

If the recharge works, at least you will have slightly blowing cold air rather than hot and you can continue that way until the unit fails.

Jul 09, 2013 | Cars & Trucks

1 Answer

1999 Ford Ranger AC low side pressure reads 100 psi


Was the a/c compressor running when you got this reading?

Feb 03, 2012 | Ford Ranger Cars & Trucks

1 Answer

AC will blow cold air for a few minutes then start blowing hot air, cut the engine and start it again and blow cold air for a few minutes then start blowing hot air again. Just filled up the freon and the...


you have moisture in the system this causes your expancion valve to freeze up an stop working, thats why it works for sort time and when it de-freezes stars working again. you need to do a EVAC & RECHARGE with a good AC service equipment, specially attention to pull vacumm por at least 20minutes so you get all moisture out of the system.
Good luck

Jun 05, 2011 | 2002 Hyundai Santa Fe

1 Answer

Ac blows cold air for about 15 minutes then starts blowing warm air then starts blowing cold air again freon is full


Freon is not full. If it goes back and fourth it is pumping then reaching a low pressure on the low side below 35 psi. Pressure while car is off should be pegged. Check at idle should be around 50 psi and 35 psi at 2000 rpms.

Good luck. If problem persists evac system replace dryer and recharge.

Oct 21, 2010 | 1983 Mercedes-Benz 300-Class

2 Answers

How many pounds of r134 and how much oil ozs.


somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.
  • Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
  • Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –
  • Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
Thank you for using fixya and be safe.

Jul 19, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

Can i recharge the air conditioning in my 2001 pontiac grand am se 2.4L myself


yes you can! get an r134a hose and 2 or 3 cans of r134a refrigerant. Find the low side port which has a black or blue cap on it (unless it got thrown away) and use the 'quick connector' while the can is screwed on to the other side of the hose.

You can get a recharge kit for maybe $35 at walmart, which has 1 can of freon which might be all you need to get the cold back into your a/c system.

Make sure that the compressor turns and spins with the belt, and also that the fan turns on at the radiator when you put the a/c on high fan and the coolest setting.

The pressure should range anywhere from 25 to 45 psi when you do this procedure, and if the compressor is not turning the pressure should be 75 to 100 psi on a hot day.

Hope this helps!

Jul 08, 2010 | 2001 Pontiac Grand Am SE

2 Answers

Hot air comes out driver side, but cold air comes out of the passenger side


My 2000 Bonneville would do that when the pressure in the ac system was low. I had a leak in my system and bought a recharge kit and charged it when it got low. The correct way is to fix the leak of course, but this worked for me for the last 8 months until I had it fixed this week.

Jan 30, 2010 | 2000 Pontiac Bonneville

2 Answers

Air conditioner blower stopped working on 2004


If the blower works but its just not blowing cold air, its possible to recharge the AC system yourself. Most auto parts stores carry AC recharge kits. Instructions to recharge the AC are belowl

RECHARGING AC SYSTEM

1.Turn the truck on and turn AC on HIGH
2.Locate the low side AC line (will have a valve and cap similar to the cap on a tire)
3.Insert the oil or R-134A can to the hose (Do not turn the screw to puncture the can yet)
4.Insert the other end of the refill hose to the low side valve
5.Puncture the R-134A can with the screw on the refill hose
6.You should feel the system suction the refrigerant out of the can
7.Check for frost on the AC lines and the air blowing inside the truck
8.If frost develops and the air is cold, you've successfully recharged the system and disconnect the refill hose. DO NOT ADD MORE REFRIGERANT...overcharging the system will damage your compressor and will be less effective


Best of luck and enjoy your vacation.
Greg

Hopefully this answers your question and you're able to get your AC working again. Best of luck.

Jul 29, 2009 | 2004 Honda Accord

1 Answer

Ac quit blowing cold air


check the compressor belt if its worn or slipping replace adjust belt tension.have garage discharge system your low side should be 28 to 30 high side should be 200 psi.system might need a new accumulator. have it pump down and recharged.

Apr 29, 2009 | 2003 Toyota ECHO

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