The answer to 'what is maintenance' is maintenance refers to the regular care and upkeep of your HVAC system to ensure it continues to operate efficiently and effectively. This includes tasks like cleaning or replacing air filters, inspecting and cleaning the condenser coil, lubricating moving parts, and checking the refrigerant levels.
Proper maintenance helps extend the lifespan of your HVAC system, improve indoor air quality, and reduce energy costs by keeping the system running at peak performance. It's recommended to have a professional HVAC technician perform a comprehensive maintenance check-up on your system at least once a year, usually in the spring or fall before heavy use.