So few days ago ac died on me, thought it needs refrigerant, today refilled it, and ac still doesnt blow cold air, sounds like commpressor not even want to start, looked for fuses(all okay), checked for trouble codes, there are none, so where else to look for problem? 🤔

 

how did you know how much refrigerant to put in without a set of gauges? You really need to hook up a set of gauges and see what your pressures are. The compressor may not be coming on because the low pressure switch is open.

 

If compressor not engaging may be still a shortage of refrigerant? Check with gauges. If ok may be clutch coil de-energized or intermittent energized? Check by disconnecting electrical clutch wire from the electrical system and connect it to the positive pole of the battery using a 7.5A fuse (if the clutch does not engage, must be replaced). If does engage, check pressure switch, thermostat, A/C control switch, and other electrical connections. If ok check distance between compressor pulleys and electric clutch plate which should be between 0.3-0.5mm.... Hope this may be of some help.
(Read next post. That guy is quite knowledgeable about the LS430)

 

The electrical connection to the clutch is internal to the compressor.
Unless I'm missing something the procedure you're describing is not possible on a 430 without evacuating all the refrigerant and removing the compressor from the car.

 

tried the a/c pro route a few years ago. put in too much and also locked down compressor. best left to pros as service is not that expensive.

 

I didnt reffiled refrigerant my self, the refrigerant system has no leaks, what you mean about switch?switch located on compressor or near the radiator in front? 🤔

 

Well, fun fact, fl model uses variable displacment compressor, it has no clutch and neither ac relay in engine bay, by switching ac, sounds like all systems getting ready for compressor: rpms jumps a bit, fan starts, but no cold air, probalby just need to take ls to professionals, I think that the compressor died on me 😔

 

Please accept my apologies for posting information I used for the compressor with a cycling clutch on my truck which is not applicable to a variable displacement compressor whose clutch is always engaged with its axial wobble plate's angle changes controlling refrigerant displacement. While is it now very obvious I am no one to throw stones, from what I've read, the tech should have been monitoring the variable voltage signal to the compressor which readings would answer if the system was working or had a problem. I do not know whether the LS430 compressor has a clutch plate or a shear pin, but if you take the belt off and you can easily spin the compressor pulley the part has sheared for some reason. However if you feel resistance when you try to spin the pulley maybe check the input sensors? (Had the tech monitored the signals to the compressor when the system was serviced, the issue may have been discovered.)