5 y.o AC 25 FAU System check Systems are operational upon arrival. Cycled cooling. Both systems are producing an 18°+ splits. Hooked up refrigerant gauges and found pressures to be in spec. Electrical for both systems are good. Recommend hard start kit in near future to mitigate compressors workload and extend systems lifespan. Condenser coils are fairly clean. Inspected furnace, run cap for both systems failed 9.3 and 9.5. Scorch damage to circuit boards. Return ducts are not properly sealed and are bringing the attic space into the living. Space when operating. Advised sealing with Pookie. Heat exchanger, showing major wear and tear. 1ppm of carbon monoxide detected (good). Recommend low detecting carbon monoxide monitors. Systems are relying on 1 inch filters. Recommend 5 inch media filters for newer systems. Due to the state and age of the furnaces advised clients be wary of major repairs. Clients have elected to move forward with sealing return ducts and signing up for maintenance