100% Free

No Scanner Needed

Carly logo

Carly Community

Rear ventilation flap fault

The rear ventilation flap takes care on ventilation in the back of the car.

Costs

Every car issue can be caused by different things. Here are the most common ones

Unlock the costs

Simply enter your email for free to unlock the costs.

Most Expensive

Moderate costs

Moderate costs

Cheapest case

Discussions

User of our Carly Community asked the following questions regarding that fault:

Smart Mechanic

Details

Probability

Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made

high-probability

HIGH

Typical consequences

If this defect is detected, it may lead to the following problems:

  • Restriction of driving comfort

Functionality ventilation control

Ventilation flaps are essential for air distribution and temperature control in the rear compartment. They allow the adjustment of air volume and temperature at the rear vent outlets. They are controlled by the IHKA control unit, which communicates via a bus system.

The adjustment motors, called "MUX motors", are connected to the bus system and are thus capable of diagnosis. Errors are registered and interrupt the control. Each motor is uniquely addressed, which allows precise differentiation during bus communication and means that the motors are not interchangeable.