For models without AC, remove the right register duct, ventilator control assembly, glovebox liner, and ventilator grille. Detach the ventilator assembly and remove the blower wheel and motor. To install, reverse these steps. For models with AC, remove the glovebox liner, disconnect the vacuum hose, remove the bolt securing the instrument panel, and the trim panel. Remove screws and nuts securing the blower housing and air inlet duct assembly. Disconnect the blower motor wiring and remove the mounting plate. If removed, reinstall the blower wheel, secure it, and install the blower motor. Tape the wiring to the air inlet duct, place the assembly back, connect the vacuum hose, then install the glovebox liner and secure the panels.