IHC-200 now has a humming noise

My IHC-200 now has a permanent low noise. This noise is a type of “low frequency hum” or a ¨droning sound". It started about one month ago. I disconnected the controller and restarted it but the noise is still there. Thanks in advance

Hello,
Could you please let me know at what distance from the IHC-200 the humming noise can be heard?

From 5 to 10 feet. We can hear it.
Thanks for the follow up
Looking forward to read your next advice/response

Jacques

Hello,
Could you please provide a video of this problem and order information to email support@inkbird.com for after-sales service?
Since forum posts are public, these may involve private information, please do not reply here.
Thanks.