The answer to 'what does preventive maintenance do' is that preventive maintenance is the regular, scheduled maintenance of HVAC systems to keep them running efficiently and catch any potential problems early. This includes tasks like cleaning the system, changing air filters, inspecting components, and testing for proper operation. Preventive maintenance helps extend the lifespan of HVAC equipment, improves indoor air quality, and reduces the risk of sudden breakdowns or costly repairs down the road.
By performing preventive maintenance on a regular schedule, homeowners can catch minor issues before they become major problems. This saves money in the long run and helps the HVAC system operate at peak performance. Preventive maintenance should be done at least once per year, ideally in the spring or fall when the system is not in heavy use.