What are the symptoms of a bad car blower motor?
2 Answers
The symptoms of a bad car blower motor include no air blowing from the air conditioning vents. Once the blower motor fails, the car owner should promptly replace it with a new one. The blower motor is a crucial component of the air conditioning system, as it enables the air conditioning vents to blow air. How car air conditioning cools: When the AC button is pressed, the compressor clutch in the car's air conditioning system engages, and the engine drives the compressor to operate. The compressor continuously compresses the refrigerant and delivers it to the evaporator. Inside the evaporator, the refrigerant expands and absorbs heat, cooling the evaporator. How car air conditioning heats: When the heating function is turned on, the high-temperature coolant from the engine flows through the heater core. At the same time, the air blown by the blower motor passes over the heater core, allowing the air conditioning vents to blow warm air.
When the car's blower motor fails, the most common symptoms are the fan not working at all or producing very little airflow. In summer, the interior temperature rises rapidly, making it feel stuffy and uncomfortable, while in winter, there's no warm air blowing out, and the windows tend to fog up, obstructing visibility. Sometimes, strange noises like squeaking or the sound of a stuck fan blade can be heard, usually due to motor aging or bearing wear. I've experienced this situation, especially during long drives—poor air circulation inside the car can increase fatigue and even cause dizziness or headaches. For safety, it's best to promptly check if the fuse is blown or if there are wiring connection issues to prevent it from escalating into an air conditioning system failure. It's advisable to visit a repair shop as soon as possible and not delay too long. Additionally, a non-functioning fan can cause excessive pressure on the AC compressor, leading to increased fuel consumption—these small details are worth noting.
