This option is the least expensive option that would safely address what we were called out for. Arrived at clients for cooling maintenance. Set thermostat to cooling. Inspected coil and blower. Air filter was good. Flushed condensate drain line. Had to rebuild due to a leak at condensate trap. Washed outdoor coil and checked electrical components. Checked system pressures. Client approved teflon treatment for coil and blower. System is operational at this time. Job complete.