Yeah, you're absolutely right. Took the car to my pal at Autozone. He used the highly technical tool (paper clip) to over-ride my low pressure switch. Sure enough, that was it. $14.95 later, got a/c, and my Autozone friend even put it in for me. He was amazed Tuffy's (Mary Esther, FL) didn't say anything about potential causes either.
Thanks a bunch,
Dave