Yes, most shops have a recycling machine that will recover the R12, clean and dry it and then you can put it back in.

Depending on which switch is bad, however, it may not require emptying the system. One of the switches is thermal and simply threads into a closed hole in the r/d. The other is indeed a pressure switch and requires emptying the system, evacuation and recharge.

Don't jump the gun and assume that a switch is bad. It is quite common for there to be wiring problems, a bad relay or any number of things. Measure twice, cut once.

Good luck,