The answer to 'how to clean preventive maintenance' is to regularly clean and maintain your HVAC system to ensure it runs efficiently and safely. This includes cleaning or replacing air filters, inspecting and cleaning the condenser coils, checking and cleaning the condensate drain, and lubricating moving parts.
It's recommended to perform this preventive maintenance at least once a year, typically in the spring before the cooling season starts. This will help extend the life of your HVAC system and prevent costly breakdowns. However, some tasks like replacing air filters may need to be done more frequently, such as every 1-3 months depending on usage and indoor air quality.