if you bridge the 2 wires on the pressure switch does the compressor work? or does it get power then?

Have you replaced the dryer?

 

Hello, i have the same problem so i think...
so i drive a Mitsubishi colt Z30 from 2005 the 1.5 mpi
and i was today in a shop for refiling but the A/C does still not start just the RPM goes high for some sekunds, and than it go down again...
i was thinking that maybe the Clutch try to engage and stopp after short time, but i also think can be a electrical problem, how could i test the connectors with my "Digital Multimeter" if posible or should i make the AC on than the plugs are puled? to check if one is faulty?
Also some people on Youtube use to short out the clutch to force it to engage, to test if the clutch was working correct.
Sorry for my Grammer englisch is not my first Language!