Nest hello wiring help

RichHat · 26 Mar 2021 at 18:41

Hi, I've just moved into a new build property that has a wired doorbell that is a transformer and chime all in one box, it's a BG MDC1
I'm having a problem wiring the hello doorbell, I've followed the instructions exactly but get a buzzing noise when connecting the chime connector and no power to the door bell itself?

Any advice is appreciated thank you

Schizophonic · 26 Mar 2021 at 20:10

If your not an electrician then you'll struggle. The existing chime transformer might not be suitable for ALL TYPES of existing home chime boxes. You might be able to find some youtube guidance but I generally seek professional help especially tradesman who specialise in the smart sector. Alternatively you can just use the existing battery for the Hello and pair it up to a google speaker and the door bell rings, the google speaker lets you know. Good luck!

Semple · 26 Mar 2021 at 20:15

What voltage outputs on the transformer are you connecting to?

RichHat · 26 Mar 2021 at 20:23

Semple said:
What voltage outputs on the transformer are you connecting to?

I've managed to wire it using a nest diagram and seems to be working fine although the chime inside doesn't want to work now.
It's working at 16v

Semple · 26 Mar 2021 at 21:44

From memory I don't think most traditional chimes work at a higher voltage - which is of course needed to power the doorbell. So you might need a different chime, or do away with it completely.

tres · 26 Mar 2021 at 22:22

If you have google minis, they work well as a chime, we had a similar chime voltage issue and just did away with it

RichHat · 27 Mar 2021 at 06:48

tres said:
If you have google minis, they work well as a chime, we had a similar chime voltage issue and just did away with it

I don't have a mini but may look at getting one if the chime has bit the dust lol

Semple said:
From memory I don't think most traditional chimes work at a higher voltage - which is of course needed to power the doorbell. So you might need a different chime, or do away with it completely.

Doorbell has worked seamlessly through the night with no dropouts, haven't checked if the chime is working again yet though