I'm an HVACR tech but have a Bachelors in Information Systems. I'm Cisco certified, Microsoft certified, CompTIA A+/Net+ certified, yet I work on and install heat pumps, air conditioners, furnaces and commercial equipment all day (and love it).
I actually took some HVAC classes when I went to community college. It came in handy because that's now my line of work. I've never worked in IT unless you count my work study time as a helpdesk analyst during university. People ask why I am doing HVAC instead of IT but I actually earn more. Entry level positions in IT pay OK but not as much as I earned when I started out in HVACR, plus a lot of IT positions are notorious for requiring so many years of experience just to get noticed by HR, even for "entry level".