Upon my arrival in Rosanky I performed the fall evaluation on one heat pump system. I found everything is operating properly in both the performance and safety aspects of the system. During the evaluation I noticed a significant amount of dirt piled inside the return air box. I brought this to the customer attention and recommended they vacuum it out. They have had this similar issue in another area of the home before and believe that it’s ants bringing the dirt in. I spoke with them about some ant poison I use and will get the name to them later when i arrive home.