To maintain your AC unit between professional services, regularly replace or clean the air filters every 1-3 months to ensure proper airflow and efficiency. Keep the area around the outdoor unit free of debris, such as leaves and grass. Clean the condenser coils and check for any visible signs of wear or damage. Inspect and clean the evaporator coils inside the unit as needed. Ensure that the thermostat is functioning correctly and set at optimal temperatures. Regularly checking these aspects helps maintain your AC unit’s performance.