Came out today for 1 system maintenance. Upon arrival started with outside inverter system, checked all electrical components and washed outside unit. Coil fins are clean and in good condition, no signs of burn marks. Surge protection is operating as designed. On indoor air handler checked all electrical components all components are in good condition with no signs of burn marks. Filter was just changed 20x25x4, ducts are clean as well as ecm motor and wheel is clean from last visit. Only recommendation I have is to add pan treatment into system to keep drain lines clear. Thank you for your time and allowing me into your home.