My a/c compressor keeps clicking on and off. Not getting much cooling. Anyone got a fix?? Thanks

 

That sounds like you're low on R134a refrigerant. Yours is 1999, have you ever had to add refrigerant before? If not, could be from normal seepage over the years. Anyway, you may have a bigger leak now, look at your fittings, crimps, connections, see if you can see an oily residue from refrigeration oil. Soap bubbles can also be used to find a leak. More sophisticated methods are adding UV dye then using UV light/goggles to find the leak, or an electronic refrigerant sniffer detector. Consider having an auto AC shop (that means: not a brake place, not a Midas) diagnose the leak. Sometimes a fitting just needs tightening, sometimes a compressor seal is leaking and the compressor needs replacing. You could add ONE can of R134a and see how fast that leaks out. If it lasts a year or more, just do that.

 

Seems to be holding a charge, don't see any leaks, could it be a relay/sensor bad that keeps the clutch constantly cutting off and on??

 

You need to read both high and low side pressures at about 2000 rpm after the AC has been running for about 10 minutes, and post here. One needs proper equipment to do AC work, such as a good gauge set. Without that your just guessin', so get the gauge set or take to a pro. Anything else is a crapshoot. For sure DON'T add any sealer, conditioner, etc.

 

Thanks for the help. Appreciate it.