What is a Precision Tune-up and how much does it cost? Besides the professional visual inspection included with our System Inspection, a Precision Tune-up also comes with a total maintenance cleaning and lubrication of the heating or air conditioning equipment components. Discover more here about San Antonio Air Service Experts Heating & Air Conditioning’s Precision Tune-up steps . The fee for a tune-up is seasonal, and printable coupons with seasonal discounts on tune-ups may be found on our Coupons page. Back To Frequently Asked Questions