Heating season tune-up on an older (12 yr. old) Lennox heat pump in West Branson, MO. It shows this unit is still running well! I completed all tasks including changing the air filters to maintain proper airflow and indoor air quality. Also, checked thermostat settings to verify accuracy and adjust it if needed for comfort and energy efficiency. I inspected and lubricated all moving parts such as motors and bearings, to reduce friction and prevent wear. I do all the proper diagnostics for our clients during annual maintenance. That way the customer can rest assured they will keep warm this winter!