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?

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.

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

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.

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.

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!

check freon if it is full charge ,check auxiliary fan , if this two condition is good ,you need to replace expansion valve and filter drier

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.

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.

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.

Start by recharging your system. If you want to do it yourself. Most auto parts stores and hardware stores have recharge kits. Purchase a kit with a gauge to prevent overfilling.