Why is the air conditioning noise so loud in the Haval M4?

[VonJayce]

The loud air conditioning noise heard inside the car may be due to a blower fan issue, while the increased noise heard outside the car could indicate a compressor problem. Compressor issues: Loose mounting bolts on the compressor; insufficient lubricating oil in the system; excessive refrigerant in the system; compressor clutch slipping or seizing; internal wear of compressor components. If the car's air conditioning compressor makes abnormal noises, check each item one by one and take appropriate measures as needed. Blower fan issues: Loose mounting bolts on the blower fan; fan blades hitting other components; loose fixation between blades and motor; foreign objects entering the air duct; wear and damage of the blower motor; abnormal voltage or current in the electrical system.

[McIsabelle]

I've been driving a Haval M4 for several years, and the air conditioning noise has become so loud that it affects my driving mood, especially when parked. Later, I consulted a car mechanic who said it might be due to excessive dust accumulation on the fan blades, causing long-term unbalanced operation and noise, or the air filter being too dirty and blocking airflow, forcing the fan to increase speed and produce a buzzing sound. Aging fan bearings are also a common issue, resulting in squeaking during operation. Another reason could be a loose compressor belt, causing friction and strange noises. I occasionally clean the filter myself, but regular professional maintenance is key. Last time, I went to the 4S shop for a deep cleaning and added lubricant, which significantly reduced the noise. It's recommended to check the air conditioning system every 5,000 kilometers to detect potential issues early, saving both money and hassle. The noise is even more annoying when driving at night, affecting concentration—safety first.

[SanFinn]

As a car enthusiast, I've studied the noise mechanism of the Haval M4's air conditioning system. The aging of the fan motor is the primary cause, with bearing wear leading to unstable rotation and a whooshing sound. Abnormal pressure during compressor operation or refrigerant leakage can also cause roaring. A loose belt drive system may produce squeaky vibrations, with the entire engine compartment resonating to amplify the noise. In terms of design, the compact layout of the air conditioning system leaves little space, making sound reflections more noticeable. In daily use, dirty filters increase the load, causing the fan to spin faster and become noisier. I recommend focusing on these components during maintenance: check for fan deformation, compressor condition, and belt tension. Replacing the filter and lubricating the bearings can significantly reduce noise. Be aware that excessively high decibel levels may indicate major faults, so don't delay until repair costs escalate.

[DiCamila]

This is a common issue encountered during car repairs. Loud air conditioning noise is usually caused by a clogged filter or a damaged fan. First, check the position of the air conditioning filter and replace it if it's dirty. Cleaning the dust will reduce the noise. Second, identify the source of the sound: if it's coming from the engine compartment, it might be a loose compressor belt that needs tightening; if it's from the dashboard area, the fan bearing may lack lubrication. Compressor failures, such as pressure imbalance, can also cause roaring. For regular maintenance, I recommend cleaning the air conditioning system every 5,000 kilometers to prevent major repairs. If the noise gets progressively louder, stop using it immediately to avoid damaging other components. Simple tools like a screwdriver can be used to check if the fixing screws are loose. Always prioritize safe driving when addressing these issues.