Temperature sensors

Five temperature sensors are installed for the IHKA:

• Ventilation temperature sensor, front left
• Ventilation temperature sensor, front right
• Footwell temperature sensor, left
• Footwell temperature sensor, right
• Evaporator temperature sensor

The temperature sensors measure blow-out temperature directly at the ventilation flaps. The IHKA control unit evaluates the signal from the temperature sensors. The IHKA control unit uses this message to adjust the corresponding flap motors.

The evaporator temperature sensor picks up the outlet temperature of the cooled air at the evaporator to prevent icing of the evaporator.

The temperature sensors are thermistors or NTC resistors ("NTC" stands for "Negative Temperature Coefficient"). NTC resistors can convert the "temperature" value into a "resistance" value, which can then be evaluated electronically.