A/C clutch doesn't engage

My A/C don't work?I checked the fuses and C/B,All good Also I put ignition in on and depressed the A/C switch and heard a click sound.I'm by myself so I don't know if that was the A/C clutch or the accelerator solinoid,Can you help

Maybe the system just needs to be re-charged.. If the r-12 pressure becomes too low, the pressure switch wont let the a/c clutch turn on, so it doesnt burn it out..