Nest base buzz

[UPJake]

The base on one of my two Nest T4000 all of a sudden started buzz even with the thermostat removed. I removed the wires and cleaned the ends and no change. It is a two wire system that has been working for four or five years with no issues. So both are connected to the same power supply and only one makes the noise. The wires are the typical solid copper and the one that is buzzing is about 10ft from the transformer. I have read all kinds of bad info from I have to have the C wire to electronic stuff makes noise all the time. Has anyone found the root cause?

[Markjosephp]

Hello UPJake,

Thank you for taking the time to let us know about your inquiry.

I hope everything is okay, and we'd want to look into this for you. Please fill out this form so we can investigate it, and let us know once you're done.

Best regards,

Mark

[Markjosephp]

Hi there,

I'm checking back in — how's it going? Were you able to fill out the form? Let us know so we can assist you right away.

Thanks,

Mark

[Jhonleanmel]

Hi folks, 

I wanted to follow up and see if you are still in need of any help. If so, please fill out the form so we can help you further.

Best,
Mel

[Dan_A]

Hey there,

I'll be locking this thread in 24 hours. If you're still experiencing problems, feel free to start a new thread and we'll be happy to help.

Regards,

Dan