Disconnect the negative (-) battery terminal.
Remove the crashpad.
(Refer to BD group - "Crash Pad")
Remove the cowl cross bar assembly.
(Refer to BD group - "Crash Pad")
Remove the heater and blower unit.
(Refer to HA group - "Heater Unit")
Remove the blower unit (A) from the heater unit after loosening a mounting screws.
Make sure that there is no air leaking out of the blower and duct joints.
Installation is the reverse order of removal.