2003 Suzuki Aerio Vent control does not work

Heater Unit Removal and Installation
Removal
Disconnect negative (-) cable at battery.
Drain engine coolant, and disconnect heater hoses (1) from heater unit.
Remove heater unit mounting nuts (2).
Fig. 16: Removing Heater Unit Mounting Nuts
Courtesy of SUZUKI OF AMERICA CORP.
Remove instrument panel referring to "INSTRUMENT PANEL REMOVAL AND INSTALLATION ".
Remove blower unit (1) referring to Step 4) to 6) of "BLOWER UNIT REMOVAL AND INSTALLATION:".
Remove drain hose (2).
Remove heater unit (3).

Removal
Disconnect negative (-) cable at battery.
Disable air bag system referring to DISABLING & ACTIVATING AIR BAG SYSTEM.
Remove steering column assembly referring to STEERING COLUMN ASSEMBLY REMOVAL AND INSTALLATION.
Remove glove box (1), glove box side cover (2), and hood latch release lever (3).
Fig. 42: Removing Glove Box
Courtesy of SUZUKI OF AMERICA CORP.
Remove console box.
Remove instrument panel center under covers (1).
Fig. 43: Removing Instrument Panel Center Under Covers
Courtesy of SUZUKI OF AMERICA CORP.
Remove front pillar trims (1), front pillar lower garnishes (2), front side sill scuffs (3) and dash side trims (4).
Fig. 44: Removing Front Pillar Trims, Front Pillar Lower Garnishes, Front Side Sill Scuffs And Dash Side Trims
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect instrument panel harness connectors, antenna and heater control cables which need to be disconnected for removal for instrument panel.
Remove instrument panel ground wire.
Remove instrument panel mounting bolts (1).
Remove instrument panel (2) with steering support member (3) and instrument panel harness.
Fig. 45: Removing Instrument Panel
Courtesy of SUZUKI OF AMERICA CORP.
Installation
Reverse removal procedure noting the following.
When installing each part, be careful not to catch any cable or wiring harness.
Tighten steering support member support bolts to specified torque
Tightening torque
Steering support member support bolts (a): 23 N-m (2.3 kg-m, 17.0 Ib-ft)
Fig. 46: Tightening Steering Support Member Support Bolts
Courtesy of SUZUKI OF AMERICA CORP.
Install steering column assembly referring to STEERING COLUMN ASSEMBLY REMOVAL AND INSTALLATION.
Adjust control cables. Refer to HEATER CONTROLLER REMOVAL AND INSTALLATION.
Enable air bag system referring to DISABLING & ACTIVATING AIR BAG SYSTEM.