Upon further review, in actuality you should "have" an AC man, much like you do a regular car mechanic. In the ideal world, it should be with the company who installed the unit. That way when they regularly come out in the spring and fall to check the unit, they become familiar with it and you become familiar with them. A human relationship is built. Trust evolves, and you feel comfortable about being treated fairly and they will come out at the drop of a pin. 4951