Performed level 2 Package Cleaning. Furnace. Ventor motor bearings are showings signs of wear. Heat exchanger is a little worn with rust. Burners and flame sensor are cleaned off, but showing signs of wear. Combustion analysis test was normal. No CO in the airstream. Found rust in both furnace compartments. Rust came from a loss exhaust fitting that was leaking water. I tightened the fitting and there is no leaks or standing water at this time. AC. No leaks detected at indoor coil. Electrical components tested good. Condenser coil is clean. Refrigerant charge was good. Temp split was 17 degrees. HVAC system is operating normal at this time.