Air-Con Compressor Rattle?

Hello Friends,

Recently I started hearing a somewhat strange rattle-like noise from the what sounds like the air-con compressor in the front. It's only present while the system is on and when the car is in gear/drive. Goes away in neutral and it appears to be related to engine speed. Sounds similar to a plastic card flapping against the spikes of a bicycle. Air-con works just fine. And of course, if I switch the systen off - sound diappears.

My guess - pulley bearing/clutch?

Any advice would be much appreciated. Thanks in advance.
Arc

I have a similar noise when my air con / fan is on - except mine sounds more like a bird chirping. Also seems to be dependent on engine speed.

Have same noise. Turn A/C off during winter but soon need to find out how to fix. Dealership didn't notice anything but offer change belts. I change belts and pulleys and noise still there when A/C on. What mileage on the your car? mine 115k km.

Hey fellas,

Thanks for the input. The noise comes and goes randomly. Also have noticed - it appears more prominent/present at the lowest fan speed/coldest temp setting.
As far as the bird-like chirping - I've noticed a similar noise once or twice, again at low fan speeds. Microfilter?

No way, Microfilter? Yo mean cabin filter or filter inside metal can which is near passenger side headlight? Cabin filter is 2 month new in mine car and did not make a difference about noise.

Could be, mate.
The sound reduces is prominence as I adjust the temperature from cold to warm from the rotary dail between the air vents, i.e. noise goes away.
Really confused.