I’ve had this buzzing noise for a while since I bought the car 3 years ago. The dealer said they couldn’t pin point the noise but they believe it’s the radio causing an interference and not to worry about but now this noise i believe is getting worse. Not sure if anyone has experienced this problem. Also happens occasionally with cold starts but not as loud as when the ac gets turned on. Thanks in advance everyone

 

This is the noise

 

check under the filter at the blower motor for a mouse stuck inside or debris.

 

Think it would make this type of noise tho?