Disconnect the negative (-) battery terminal.
Remove the crush pad.(Refer to BD-crashpad)
Disconnect the connectors from the intake actuator, the blower motor and blower resister.
Remove the blower unit (B) from the heater unit after loosening a mounting bolt and 3 screws.
Make sure that there is no air leaking out of the blower and duct joints.
Installation is the reverse order of removal.