I'm a typically handy guy who knows his limits. I recently moved into a new house so am unfamiliar with the history of the equipment.
Before I switch the thermostat to A/C for the first time this year, I'd like to do visual inspection/maintenance on my A/C unit. What is a list of things an HVAC company would check/do on a system with no apparent issues?
I would not check refrigerant levels myself because that's illegal here, but I would still like stuff like that included in an answer.