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What a Seasonal Tune-Up Actually Includes
Marcus Delgado · May 20, 2026
Capacitors, coils, drains, and documented performance numbers: exactly what happens during a seasonal tune-up and why each step matters.
A tune-up is the closest thing HVAC has to an oil change: routine, affordable, and the reason expensive parts last as long as they should. But not every company means the same thing by it. Here is exactly what our technicians do during a seasonal visit, so you know what you are paying for.
Electrical first
Most summer breakdowns are electrical: swollen capacitors, pitted contactors, loose lugs. We test every component under load and replace weak parts before they strand you on a 110-degree Saturday. Tightening and testing takes minutes and prevents the majority of no-cool calls we run in July.
Airflow and drainage
Next comes the evaporator coil, the blower wheel, and the condensate drain. Dust on the coil acts like insulation, forcing longer runtimes for the same cooling. Algae in the drain line backs water into the overflow pan and trips the float switch, which shuts the whole system down. Both are quick fixes during maintenance and miserable surprises afterward.
The visit ends with a full-system performance check: temperature split, refrigerant pressures, and static pressure, all recorded on your invoice. Keep those numbers. Comparing them year over year is the earliest warning system your equipment has.
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