Dear customer. Thank you for choosing us to inspect your air conditioning systems During the basic 40 points inspection, we recommend: — Install (1) whole house surge protector to protect AC compressors and all equipments in your house from power surge/lighting — Due to the age of the system (4 years old), installing the hard start kits will help the compressors start and run easier, keep them last longer — Wash and clean condenser coils for better efficiency — Optional: Installing UV light treatment kits in your AC system will help to reduce mold and mildew growing inside your air handler and ductwork