1. If the AC is making the air cool (i.e. is working) it's normal for the compressor to turn on and off automatically. If the air is not getting cool, you probably did not charge the AC with enough refrigerant. Old cars had sight glasses in the dryer so you could tell if they are charged. New cars (i.e. cars that use R134) do not have sight glasses and you need the proper gauges to recharge them. This should be done by a proffesional. You could cause thousands of dollars of damage to your AC if you over charge it. Also, if it needs to be recharged, it has a leak that must be fixed. Take it to a properly trained auto AC service center.
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Have you tried that stuff called "AC PRO"? It comes in a can with a pressure gauge and there are videos on youtube that show how to use it.
Now if you've replaced a compressor or another part of the AC system, you'll need someone to use a vacuum pump on the system to remove all air and moisture, and then they can recharge it with fresh R-134 refrigerant to the proper specification, which whoudl be listed under the hood on a sticker. This sticker also shows vehicle engine and emission information.
in order to recharge the ac you first must clear the trouble code for the ac off warning. when you get this warning the computer shuts down the compressor to keep it from running without the lubricant that is in the freon. clear the trouble code and the compressor will run and you can recharge the ac.
its on the largest ac line that is the low pressure line its between the compressor and the firewall it should have a small black plastic cap on it and i believe that car has r 12 freon in it unless it has been retrofitted to r 134 a and has a big blue cap on it
YOU NEED A R-134 GAUGE SET TO CHECK LOW PRESSURE SIDE AND HIGH PRESSURE SIDE.YOU ALSO CAN BUY A LITTLE CHEAPER GAUGE TO CHECK YOUR AC LOW BLUE SIDE AND HIGH RED SIDE AT ANY AUTO ZONE OR ADVANCE AUTO PARTS.WHAT YOU DO WHEN YOU GET YOUR GAUGE SET HOOK GAUGE TO LOW PRESSURE SIDE BLUE CAP PORT AND GAUGE TO HIGH SIDE PRESSURE RED CAP PORT.YOU CRANK CAR UP GET IT OPERATING TEMPERATURE.THEN TURN AC ON HIGH COOL LET RUN 3 TO 4 MINUTES.CHECK LOW SIDE GAUGE READING SHOULD BE 28 - 32 PSI. HIGH PRESSURE SIDE GAUGE SHOULD 199 - 228 PSI. THATS NORMAL CHARGE. SEE YOU CANT JUST RECHARGE AC SYSTEM UNTIL YOU CHECK IT FIRST YOU WILL DAMAGE SYSTEM .NOW YOU CAN GO TO AUTO ZONE PARTS BUY A CHARGE CAN WITH GAUGE AND HOSE.ATTACH TO IT.YOU NEED MORE THAN ONE CAN.WARNING MAKE COMPRESSOR IS RUNNING WHEN YOU TURN ON AC .BECAUSE IF COMPRESSOR NOT RUNNING CHECK FUSE AND AC COMPRESSOR RELAY.IF BOTH OKAY.YOU COULD HAVE OPEN CLUTCH COIL A FAULTY LOW PRESSURE SWITCH WILL CAUSE AC NOT TO WORK. IF LOW PRESSURE GAUGE BLUE SIDE PRESSURE IS 28 OR 30 YOU DONT NEED A CHARGE.PROBLEM SOME WHERE ELSE.BE SURE TO WEAR SAFETY GLASSES WHEN WORKING ON AC SYSTEM.
your freon should be 134 a.go to an auto parts store and follow step by step instructions.they give you the hoses and even tell you when it is charges. a sure tale of a good charge is on a hot day your compressor clutch will cycle off for about 10 seconds
You can buy a can or,refil kit of R-134-A at walmart however only put the freon in on the low side (read the directions) if the freon gas will not go in; run an 18 gauge wire from the battery to the compressor clutch switch to run the compressor if the freon gas still won't go in it must be evacuated and, recharged by a shop.
only put in enough freon to get the system cold any more than that and, you will lose cooling again (over charge)
Your system has R-134 Freon in it. the 134 is made up of smaller molecules than the old R-12. The R -134 permeates through the rubber parts of the system. If the system gets too low on Freon, the compressor will stop coming on.(low pressure cut out switch). Have the system serviced with an A.C. machine that can vacuum, measure the amount of Freon in the system, and add the right amount. The machine can also inject die. Later the die will show up under a black light.This will show any leaks you may have.