Maintenance braselton. Completed 2 system maintenance. Both ACs are 4 years old. Both with clean coils and blowerS. Main floor has inline float switch. Upstairs does not. Recommend installing to protect furnace from water damage. Pressures and temp difference are good. Recommend hard start kits to both outdoor systems to help compressor during start up and allow compressor to live longer. Also recommend installing UV lights in both systems to kill bacteria and viruses in air. Main floor system has 2 16x25x5 filters that customer will replace.