Reasons for the Buzzing Sound Inside the Baojun 730 When the Air Conditioner is On
3 Answers
The noise from the Baojun 730's air conditioner mainly originates from various factors such as bearings, fan blades, and motor dynamic balance, all of which are related to the mechanical processing of the motor and fan. Here is some relevant information about the Baojun 730: 1. Introduction to the Baojun 730: The Baojun 730 is a 7-seat family car customized by SAIC-GM-Wuling for the needs of millions of users, tailored for 'China's big families.' On March 1, 2019, the 2019 Baojun 730-CVT version was officially launched, including two models: the 1.5T-CVT Fashion and the 1.5T-CVT Flagship. 2. Powertrain of the Baojun 730: The Baojun 730-CVT version is equipped with a 1.5T turbocharged engine paired with a simulated 8-speed CVT continuously variable transmission. The turbocharger of this engine uses the latest generation turbocharger from the internationally renowned supplier Honeywell. The engine's rated power is 111kW, with a maximum net torque of 250N·m. The engine's turbo can engage at around 1000 rpm and reach the maximum torque of mainstream 2.4L naturally aspirated engines on the market at 1600 rpm.
When I turn on the air conditioning in my Baojun 730, it makes a buzzing noise, which is quite common. Most likely, it's an issue with the blower fan in the air conditioning system, such as deformed fan blades or loose bearings, causing significant vibration and noise during operation. It could also be due to the compressor's belt being too tight or too loose during operation, transmitting vibrations into the cabin. Last time my car had a similar issue, it turned out to be dust or debris stuck on the fan, and cleaning it helped. The buzzing sound might also be caused by resonance from loose air conditioning pipes or brackets. In models like the Baojun, the fan tends to wear out over time, so regular checks are necessary—don't delay repairs. For safety, it's best to visit a professional repair shop early to replace a part or make adjustments. Avoid DIY fixes, as improper handling could make the noise worse.
The constant humming noise when the Baojun 730's AC is on is really annoying. Having driven similar vehicles before, the issue usually stems from either the blower motor or fan blades. If the fan blades are unbalanced or the bearings are severely worn, it creates this persistent buzzing sound. Improper compressor positioning can also cause excessive vibration that transmits into the cabin. This humming isn't just a noise nuisance – it affects AC efficiency and prolonged issues may lead to fan burnout. I recommend first inspecting the fan unit behind the glove compartment for any debris obstruction. If that doesn't help, examine the compressor and pipeline fixtures. A 30-minute diagnosis at the 4S shop can usually pinpoint the issue – most cases just require fan cleaning or replacement. Don't ignore such minor problems as prolonged neglect increases fuel consumption and safety risks.
