Overhaul

NOTE:
- The recirculation control motor, the power transistor, the blower motor high relay and the blower motor can be replaced without removing the blower unit.
- Before reassembly, make sure that the recirculation control doors and linkage move smoothly without binding.
- After reassembly, make sure the recirculation control motor runs smoothly.
- Make sure that there is no air leakage.