Climate Control - Overview

• E90 Climate Control
  • Introduction
    • Notes
    • New System Components And Features
    • IHKA System Circuit Diagram
  • Electrical System Components
    • Control Units
      • A/C Control And Operating Unit (IHKA)
      • Digital Motor Electronics (DME) Control Unit
      • Junction Box (JB)
      • Roof Control Panel (FZD)
      • Car Access System (CAS)
      • Car Communication Computer (CCC)
      • Central Information Display
      • Center Console Switch Cluster (SZM)
    • Sensors
      • Interior Temperature Sensor
      • Evaporator Temperature Sensor
      • Ambient/Outside Temperature Sensor
      • Ventilation Temperature Sensors
      • Solar Sensor
      • Refrigerant Pressure Sensor
      • AUC II Sensor
      • Condensation Sensor
      • Front Stratification Adjustment Thumbwheel
      • Rear Stratification Adjustment Thumbwheel
    • Outputs
      • Stepper Motors
      • Blower And Blower Output Stage
      • Compressor Valve
      • Rear Window Defogger
      • Seat Heating
      • Water Valve
      • Electric Water Pump
  • Non-Electrical Components
    • Refrigerant Circuit
    • Heating Circuit
    • Air Cleaner/Microfilter
  • Principles of Operation
    • Notes
    • Temperature Control
    • Evaporator Control
    • Air Distribution Setting
    • Airflow Control
    • Sunlight Adaptation (Solar Sensor)
    • MAX Cooling
    • Residual Heat (REST)
    • Defrost Function
    • AUTO Function
    • Heated Rear Window
      • Notes
      • Defrosting Phase (1st heating period)
      • Pulsing
      • 2nd Heating Period
    • Off
    • Air-Recirculation Mode
      • Notes
      • Automatic Air-Recirculation Control
    • Condensation Sensor Function
  • Service Information
    • Exchanging Flap Motor
    • Running In A/C Compressor
    • Microfilter