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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Ventilation - 911 CARRERA (996) >> Removing and installing heating and fresh-air control >> Removal

Removing and installing heating and fresh-air control: Removal

  1. Remove the covers over the heating/fresh-air system, battery and fluid tank. Disconnect and remove the battery.
  2. Remove steering wheel and loosen steering column panel. Comply with safety regulations when handling airbag units (see SAFETY REGULATIONS FOR VEHICLES WITH AIRBAG AND BELT TENSIONER ).
  3. Undo the central screw (clamp) on the steering column switch from below and pull it forwards slightly. Remove the cover at the top and disconnect the electrical plug connections. Remove the steering column switch.
    Fig 1: Removing Central Screw On Steering Column Switch
    G03092902Courtesy of PORSCHE OF NORTH AMERICA, INC.
  4. Loosen instrument panel and unclip right side upwards. Disconnect the electrical plug connections.
    Fig 2: Loosening Instrument Panel And Unclip Right Side Upwards
    G03092903Courtesy of PORSCHE OF NORTH AMERICA, INC.
  5. Remove steering-column cover (4 screws).
    Fig 3: Removing Steering Column Cover & Screws
    G03092904Courtesy of PORSCHE OF NORTH AMERICA, INC.
  6. Remove radio and heating and fresh-air control. Unclip the switch panel on the left and on the right. Disconnect the electrical plug connections. Undo the retaining frame in the center and remove it.
    Fig 4: Removing Radio And Heating And Fresh-Air Control
    G03092905Courtesy of PORSCHE OF NORTH AMERICA, INC.
  7. Remove left side nozzle and disconnect electrical plug connection. Unclip cover of sun sensor and defroster panel and remove.
  8. Undo the interior monitoring system and disconnect the electrical plug connection.
  9. Remove the air guide at the bottom right. Remove the passenger's airbag unit. Comply with safety regulations when handling airbag units (see SAFETY REGULATIONS FOR VEHICLES WITH AIRBAG AND BELT TENSIONER ).
  10. Remove the front cover of the center console. Undo the fuse holder and diagnosis plug in the left footwell.
  11. Loosen dashboard on the bottom, centre, left and right. Carefully remove the dashboard and detach the loudspeaker cable.
    Fig 5: Removing Dashboard Fasteners On Bottom, Centre, Left And Right
    G03092906Courtesy of PORSCHE OF NORTH AMERICA, INC.
  12. Loosen centre tunnel support at the top of supporting frame and loosen bottom tunnel holder.
    Fig 6: Loosening Centre Tunnel Support At Top Of Supporting Frame And Bottom Tunnel Holder
    G03092907Courtesy of PORSCHE OF NORTH AMERICA, INC.
  13. Remove the left air guide. Only loosen the defrost channel. Undo and remove the center air distributor casing.
  14. Disconnect electrical plug connection from heating and fresh-air control.
  15. Loosen battery positive connection at the current distributor and current distributor at the firewall cover.
  16. Clamp shut both heater hoses in front of the heat exchanger with a commercially available hose clamp. Disconnect the heating hoses on the heat exchanger and plug the connections.
  17. Loosen heating and fresh-air control at the cover firewall (3 nuts).
    18. Fig 7: Loosening Heating & Fresh-Air Control At Cover Firewall & Removing Nuts
    G03092908Courtesy of PORSCHE OF NORTH AMERICA, INC.
  18. Loosen holder of heating and fresh-air control on the upper right of the passenger side.
    Fig 8: Loosening Holder Of Heating And Fresh-Air Control
    G03092909Courtesy of PORSCHE OF NORTH AMERICA, INC.
  19. Carefully lower heating and fresh-air control into the footwell and remove. Do not damage the electrical plug connections or cables.
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