The Complete HVAC Maintenance Checklist for Spring and Fall

HVAC systems need two tune-ups per year — one in spring before cooling season and one in fall before heating season. These visits catch small problems before they become expensive emergencies.

During a spring tune-up, your technician should clean the condenser coils, check refrigerant levels, inspect the condensate drain, test the thermostat calibration, and verify that the system cycles properly. Dirty coils alone can reduce efficiency by 30%.

Fall maintenance focuses on the heating side: inspecting the heat exchanger for cracks, testing the ignition system, checking gas connections for leaks, replacing the air filter, and verifying carbon monoxide levels. A cracked heat exchanger is a safety hazard that only shows up during inspection.

The filter is the single most important thing homeowners can maintain themselves. A clogged filter forces your system to work harder, drives up energy bills, and can cause the evaporator coil to freeze. Check it monthly and replace every 1–3 months depending on your household.

Annual maintenance plans typically cost $150–$300 per year and include both visits plus priority scheduling and repair discounts. For most homeowners in Northern Virginia, the plan pays for itself in prevented repairs within the first year.