Today I looked at heating and cooling. Although the system performs in tolerance, I have some concerns. 1. High inrush leading to loud bang on compressor startup 2. Biogrowth around the evaporator coil and blower motor 3. Defrost control board has burnt markings showing heat stress I recommend a soft start to help with the inrush, a UV light to deal with the biological growth, and replacing the defrost control board.