What Causes the Air Conditioning Noise in the Buick New Excelle?
4 Answers
The causes of air conditioning noise in the Buick New Excelle are as follows: 1. Damaged compressor electromagnetic clutch: As a high-speed rotating component, the air conditioning compressor has a relatively high probability of failure, with noise being a common issue. There are many reasons for compressor noise, such as a damaged electromagnetic clutch. 2. Severe internal wear of the compressor: This can also cause noise. There should be a certain gap between the compressor mounting surfaces. If the gap is too large, the impact will increase. If the gap is too small, the electromagnetic clutch will interfere with the compressor mounting surface during operation, which is another common cause of noise.
I've been repairing Buick vehicles for over a decade, and most AC noises aren't serious issues. The most common problem is leaves stuck in the blower fan blades, causing a buzzing sound when the AC is turned on - just remove the glove compartment to clean it. Aging compressor bearings are another frequent cause, especially in older Excelle models that develop squeaking sounds, requiring replacement parts at the shop. Another issue is AC pipe resonance, producing rattling noises while driving, which can be fixed by re-securing the pipes. An often overlooked cause is a dirty cabin air filter - when set to high fan speed, it creates a whistling sound like blowing a whistle, and replacing the filter yourself costs just around 100 RMB. My suggestion is to first turn the fan to maximum for a few minutes when hearing noises - often this will blow out any debris.
As a long-time owner of the Buick Excelle, I've encountered air conditioning noise issues twice. The first time was a clicking sound when the AC was on, which turned out to be a small card being sucked into the air intake and stuck in the blower fan. The second time was a whining noise from the front when cooling, diagnosed by the 4S shop as insufficient refrigerant causing uneven compressor pressure. Try to avoid parking under trees - willow catkins and leaves blowing into the engine compartment are particularly annoying. During maintenance, remember to have technicians check the AC drain tube; blockages can cause water accumulation and mold growth, and airflow through damp ducts can create muffled noises. Regularly replacing the filter yourself is essential - in this model, it's behind the glove box, and a DIY replacement takes just about ten minutes if you're handy.
My friend's newly purchased Excelle reported abnormal noises from the AC. I had him identify the sound characteristics: a hissing sound during acceleration indicates a loose belt; a buzzing noise at startup suggests a compressor clutch issue; continuous ticking is likely due to worn blower bearings. I advised him to check the AC drain outlet, which was found clogged with mud. After cleaning, the dripping sound under the chassis disappeared. To distinguish between wind noise and mechanical failure, closing windows and pinpointing the location is crucial. Noise near the glovebox usually points to blower issues, while sounds from the dashboard may indicate a flap motor malfunction. It's recommended to perform an evaporator cleaning every 50,000 kilometers to prevent odors and abnormal noises.
