Before cooling season
Ask about thermostat operation, airflow, coil condition, condensate drainage, electrical connections, and system performance. Follow the manufacturer’s recommended service schedule.
Before heating season
Arrange a heating check before colder weather. Fuel-burning systems need appropriate combustion and venting checks by a qualified professional.
Between service visits
Inspect filters monthly and replace as needed according to the manufacturer. Keep vents and the outdoor unit’s surrounding area clear, and report new noises, leaks, or a decline in performance.