Mercedes-Benz CLA250 fan not increasing above speed 1 with heat or air conditioning on Mercedes-Benz CLA250

Some Mercedes-Benz CLA250 owners report experiencing issues with the fan not increasing above speed 1 when using heat or air conditioning. This problem may stem from a faulty blower motor, which is responsible for circulating air through the AC vents, leading to no airflow when the system is activated. Additionally, a malfunctioning blower motor resistor could prevent the fan from operating beyond the lowest speed setting. Some owners also note that issues with the dampers controlling the air path into the cabin can result in warmer air being circulated than desired. To resolve these issues, it is advisable for owners to check both the blower motor and blower motor resistor for faults, inspect the dampers for proper function, and consider professional diagnostic assistance to accurately identify and repair the underlying cause. Prompt attention to this issue is crucial for maintaining effective heating and cooling in the vehicle.