Performed first year furnace cleaning; inspected the exhaust and intake PVC ensuring all connections were secured, removed and cleaned the burners along with the flame sensor, inspected the heat exchanger and found some rust i then sniffed the A coil and found indications of a possible leak, I then cycled the system on and performed a combustion test verifying no CO in the airstream, and lastly replaced #35 water panel. This system is currently operating normal at this time. Job complete