QC 35 II - Noise canceling stopped working

Bose product name QC 35 II


Country USA


Firmware Version 4.81


App Version 16.0


What devices were you using that were affected and what version are they on - experience problem with no device connected 

I use the headphones most nights for sleeping. The manufacture date is March 2018. The noise cancellation stopped working - it is very weak and hardly noticeable. This is my 3rd pair of Bose noise canceling headphones. They have all stopped working after 2-3 years of using. Is this to be expected? Should I have them repaired or buy new ones again?


What environment do you experience the issue in? home - noisy sometimes 


When did you start to experience the issue? Did it work correctly previously?

A few days ago, yes was working well before

Any troubleshooting steps you took

Checked Bose to see if noise canceling was actually turned on and it is