E46 IHKA Climate Control
The IHKA heater/air conditioner in the E46 is similar to the system previously installed in the
E36. Design and component changes were made to improve the overall performance and
operation of the system. This module will deal with the changes and highlights of the E46
IHKA system. Features of the IHKA system include:
• Control Panel/Module
• Single heater core for temperature regulation
• M-Bus Control of all stepper motors
• Fresh air micro filter
• Regulated A/C compressor
• Regulated auxiliary fan operation
• Heater Control Personalization
CONTROL PANEL
All heating and air conditioning functions are carried out at the control panel. The panel is
constructed as follows:
• The three manual air distribution buttons are located on the left side of the panel for
upface vent and footwell distribution.
• The automatic air distribution button is located on the bottom of the panel along with
the temperature control - blower speed control and recirculation control buttons.
• The defrost, air conditions request and rear window defogger buttons are located on
the right side of the panel.
• The LCD matrix displays the requested temperature setting and blower speeds as on
the previous system. There is now only one setting for temperature control.
• The interior temperature sensor and blower fan are located on the left side of the LCD
matrix.
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E46 Climate Control
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