Wired doorbell with inconsistent white flashes upon install

[graycard]

I just installed a wired doorbell and it is exhibiting a “blink” that is not described in the troubleshooting info. The blink is inconsistent and stops after about 2 minutes - attaching a video. After it is unplugged (wait for a while) then reattached, the device exhibits the same issue.

I read the inside chime with a voltmeter shows 16v. 16v is also read at the exterior wires.

Thank you for your help.

[jguerdat]

To me, it appears that the longer "flashes" are due to motion detection (you're close to the camera so that would be easy to trigger). However, the brief flashes aren't right - I suspect a faulty doorbell or possibly a transformer that can't supply enough current even though the voltage is correct. If the transformer specs look good, I'd swap the doorbell at  the store.

[graycard]

Thanks for the reply! I tested the voltage at the Arlo once it was connected: 15.7 (when disconnected its 16V). I decided to replace the transformer. Once the transformer was replaced the Arlo now works fine. It is at 28V which is beyond the recommended supply. Should I fix this - is this a new problem? Thanks again.

[jguerdat]

I don't know what the actual tolerance is to over/under-voltage of the doorbells. I wouldn't be very surprised that 28v could work for years but it may just be safer to use a transformer that stays within the supported range, perhaps one that is more like 20-22v to be sure.