Hey guys, I recently bought my Proton Persona. Everything seems to be going well and I'm quite satisfied with my car overall except the door handle that's not properly fixed and this issue. Every time, when I switch on the aircond, there will be this 'shrill' sound and it will be heard like every 6 seconds. It's kinda annoying when I'm waiting at the traffic light and the noise keeps coming up. Do any of you experience this problem too?

Or please don't tell me its normal for this car.

Really? Well, is there any way to reduce the noise? How did you even get used to this sound?