The answer to 'how to clean system upgrade' is to regularly maintain and clean your HVAC system to keep it running efficiently. This includes cleaning or replacing air filters, clearing debris around the outdoor unit, and having a professional service the system annually.
Cleaning the system yourself can be done relatively easily, but there are some safety precautions to keep in mind. Always turn off power to the unit before doing any maintenance work, and be careful when handling refrigerant lines or other components. For more complex tasks like coil cleaning or duct cleaning, it's best to hire a licensed HVAC technician who has the proper tools and expertise.