The answer to 'how to maintain preventive maintenance' is to follow a regular schedule of HVAC system checks and service. This includes cleaning or replacing air filters, inspecting and cleaning the condenser and evaporator coils, checking refrigerant levels, and lubricating moving parts. Performing these maintenance tasks on a regular basis can help extend the life of your HVAC system, improve energy efficiency, and prevent costly breakdowns.
It's recommended to have your HVAC system professionally serviced at least once a year, typically in the spring or fall before the peak heating or cooling seasons. During this service, a technician will thoroughly inspect the system, make any necessary adjustments or repairs, and ensure everything is operating safely and efficiently.