Some of Sacramento’s big heating and air conditioning companies say they have good jobs available in an industry with strong growth prospects, but they’re having a hard time finding qualified workers or a new generation of trainees. Beutler says it hires about a dozen trainees like Alfonzo Chavez yearly as installers, service techs and indoor air quality specialists. Andrew Dickerson, left, an installer with Beutler Air Conditioning & Plumbing, connects lines to an air condenser while trainee Alfonzo Chavez observes at a home in Foothill Farms last week.