I hooked up the device and connected the existing doorbell wires. Existing chime did not ring. I cleaned the existing wires and they do set off the existing chime when touched together. Existing doorbell is Nutone KB-10.
Hi @RingDoorbell2ndgen. According to the Chime Kit Compatibility List, the Nutone KB-10 should be compatible so it should work properly. Have you tried resetting the Doorbell by holding down the setup button for at least 20 seconds? If you haven’t, I’d suggest giving that a try before testing it again. If it still does not ring after trying that, please give our support team a call at one of the numbers available here. They’ll be able to take a deeper look at your account and device and run more diagnostics to determine what the problem is. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19 here to see how to contact support. 
Thank you for the response. It is now working properly.
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