Cold Start Arrest

IHKA E36 also includes an automatically activated cold start arrest function. The control panel/ module checks for the necessary conditions at engine start-up:

• IHKA system turned "on" and 
• Maximum defrosting request is not present and 
• Left Y-factor is 100% (maximum heating required) and 
• Left side "AUTO" mode request is present and 
• Left heater core temperature is less than 68°F (20°C).

If these conditions exist, the control panel/module will:

• Open the defroster flaps and 
• Close all other air distribution flaps and 
• Operate the blower motor, A/C compressor, fresh air flaps, and recirc. air flaps according to control panel/module settings  .

When the left heater core temperature reaches 68°F (20°C), cold start arrest ends and all IHKA system functions depend upon control panel/module settings and sensed conditions.