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, cycled the system on and checked gas pressures and did make adjustments on both stages, as well as performed a combustion test verifying no CO in the airstream, also did a refrigerant leak search on the A coil and did get indication of a leak on the AC system due to age and condition I recommend replacement of the AC system, and lastly replaced the 16x25x1 air filter. This system is currently operating normal and heating at 46 degrees at this time. Job complete