What Causes Abnormal Noise When Turning on the Car Heater?

1 Answers
StAllie
07/30/25 6:56am
Car heater abnormal noise is caused by: noise from the blower, which is mostly due to poor bearing lubrication, or there may be foreign objects inside the blower. Poor lubrication can be resolved by adding some lubricating oil or grease to the bearing. The car heater works by passing the engine's coolant through a heater core, then using the blower to blow cold air over the heater core to heat the air, thereby raising the temperature inside the car. The functions of the car air conditioning system are: 1. To adjust and control the temperature, humidity, air cleanliness, and airflow inside the cabin to an optimal state; 2. To provide a comfortable riding environment for passengers and reduce travel fatigue; 3. To create good working conditions for the driver and ensure driving safety.
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