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The system needs to be vacuumed down with a recovery machine and the proper amount of oil and freon added to ensure proper operation. The system most likely has air/moisture within it and will not function properly. Have it proffessionally serviced for adequate operation
It sounds like you've done just about everything except to check if there is a bad or intermittent wire causing this or perhaps your low-pressure safety cutout switch is possible going bad causing the compressor to kick on and off?
When self adding freon after it leaks out you get air trapped in the system. After adding freon a couple of times the air expands not leaving room for the needed freon. To continue adding freon with air tapped will knock the compressor out pretty quickly, there's not enough room for both & the air is keeping the freon from being able to cool properly give the false indication of being low on freon. The freon you are adding has the dye added to assist in finding the leak since freon does not evaporate nor dissipate it its being leaked out. A black light will assist locating the leak. The best thing is to have the unit checked & serviced by a mechanic...he'll charge about $ 150.00 to check for leaks, remove the old freon...his machine will tell him how much air its trapped in the system by how little freon is removed. For the service fee he will replace valves & gaskets, where needed, correcting most leaks. After sucking the system down & recharging the problem should be corrected.
When you add refrigerant to the system the compressor will start to cycle again. The system needs a minimum refrigerant pressure to work so when the pressure falls below that minimum the compressor wont cycle. If your adding freon yourself make sure to have engine running and the ac on max with the fan on max. As your adding freon the compressor will start when the min. pressure is achieved, watch the pressure gage closely so you don't over do it. I hope this helps you.
On that model,it will cycle on and off while you add freon.If it does not ,then the ac system might have a problem.The low side pressure switch is located on,or near the accumulator .Unplug the switch and take the wire end plug and connect the two plug in`s together(cross it out on the wire).This will make the ac compressor engage and you can charge the system,do not leave the wire connected,plug it back up to switch.If the ac compressor does not come on ,then have the system checked out.