Bose qc 35 ii anc issue
I have a pair of Bose qc 35 ii which I purchased recently about 2-3 months ago. Everything was working fine until 3 days back. Now, whenever the headphone is in high ANC mode, I can hear the "wind" from the fan in both the earcups. The noise does not occur if I use the product in Low ANC Mode. Even if I try to wave my hand near the earcups (in High ANC Mode), still I can hear the sound of the air outside. The noise cancellation is reducing a lot of noise from outside, so I guess it is working. But in High ANC Mode, it is picking up some sound from the microphone I think. I have tried resetting the device. I downgraded my firmware from 4.5 to 4.3. I again upgraded it to 4.5 Nothing was able to fix the issue. Can anyone help me please?