Arrived at the home to discuss some concerns with the customer. The customer was concerned some things went overlooked during her maintenance preformed last week. Went over issues with customer and happily checked and looked over any concerns the customer had. Checked the supply boots for build up and also checked return base for cleanliness. While I was here I just did a double check on the full heating system. System is working great, also there is very little build up in supply boots. There was build up happening inside return base so I cleaned it and vacuumed it out with my shop vac. Over all system is working properly at this time. Also gave the customer a $25 dollar gift card for any future repair for the inconvenience.