What Causes the Buzzing Noise When Turning on the Air Conditioning in the Excelle?
2 Answers
Due to the presence of air or moisture in the refrigerant system, noise is generated during the evaporation and expansion of the refrigerant. Below is relevant information: 1. Introduction: Automotive air conditioning refers to the air conditioning device installed in vehicles, capable of cooling, heating, ventilating, and purifying the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety. 2. Structure: It generally includes a refrigeration unit, heating unit, and ventilation unit. This integrated system makes full use of the limited space inside the vehicle, featuring a simple structure and ease of operation, making it a popular modern automotive air conditioning system internationally.
When the air conditioning is on, there's a hissing sound in the car. I've fixed many similar issues. The most common causes are fan blades blocked by leaves or dust, creating friction noise when rotating; or worn compressor bearings due to long-term use and aging; loose or worn belts can also produce strange noises. I recommend first checking the fan intake and outlet yourself to clear any debris; then listen to locate the source of the noise—if it's coming from deep in the engine compartment, it's likely a compressor issue. Don't just ignore these noises while driving. Visit a professional repair shop early for part replacement or adjustment to avoid affecting the air conditioning's cooling performance. Regular maintenance, including filter changes, can reduce such troubles. After all, safety comes first—prolonged strange noises increase the risk of major failures.
