Technician completed diagnostic on main system in home. Customer filter is good 20x20x1. Notice ductwork, safety switches, biological growth and ac pressures needed attention! Tech explain details to homeowner to get system back at its best peak performance. Homeowner approved to move forward with today’s repairs. Tech added 3lbs r-410a refrigerant, added safety switches, sealed ductwork and installed Bluetube UV system protection. System is operating good at this time. Will schedule accordingly to remind homeowner of next fall visit. Thanks for choosing TE Certified if you liked your technician service today don’t hesitate to leave a 5 star review!