I’m having the same issue, the VZM35-SN Fan Switch makes noises but it still works. This switch has been installed for about two years without issues and just started making the noise. However, I will have to replace this switch since the noise is problematic since the switch is installed in a bedroom and it is audible throughout the room.
I have the same setup in another room with the same ceiling fan and it doesn’t make noise. Not sure what is causing this.
I saw that this issue was posted here before but didn’t see any solutions.