On this visit I looked at both heating and cooling. This is a DC inverter system. The condensor is in tolerance. It has a sub cooling of 8° and td of 20°. The airhandler could use a uv system to help prevent biogrowth. The blower motor is relatively clean with some build up the the wire harness. They didn't have a filter to change it out today but say the have one coming. The system is in over good health.