been working on trucks for about 6 or 7 years now.going to HVAC evening classes @ community college.Started new job in January as a reefer/diesel engine tech. just completed a 2 week carrier trailer/truck refrigeration school.Man, they busted our b@(($. 8 hours 5 days a week plus 4 hours a night of homework if you really expected to learn what you needed to know. I learned a lot, as intense as some kind of academic boot camp for refrigeration units. Blows my college classes clean outta the water !!!