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gprsh924's Avatar
 
Join Date: Oct 2005
Location: Hinsdale, IL
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Doorbell Transformer?

Trying to install my Nest Doorbell. First step is to check the voltage of the transformer. What I find doesnít match pictures I see online. Can anyone confirm that this is the transformer. Iím not exactly Mr. DIY, but this seems relatively simple assuming Iím in the right place. Iíve switched thermostats, light fixtures, switches and outlets before.

Old 09-18-2020, 09:32 AM
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No picture. It is square and will have two screws that your house wires connect to. The two wires go to 110 vac.
Old 09-18-2020, 09:37 AM
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Quote:
Originally Posted by gprsh924 View Post
Trying to install my Nest Doorbell. First step is to check the voltage of the transformer. What I find doesnít match pictures I see online. Can anyone confirm that this is the transformer. Iím not exactly Mr. DIY, but this seems relatively simple assuming Iím in the right place. Iíve switched thermostats, light fixtures, switches and outlets before.
Old 09-18-2020, 09:39 AM
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Did you remove door bell wires from that. I never seen a setup like that. Might be for heating system.
Old 09-18-2020, 09:42 AM
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Can you check voltage at the doorbell wires on the front porch?
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Old 09-18-2020, 09:45 AM
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That box is the only thing I can find that sort of looks like a transformer. I could check at the doorbell, however it on stone and has caulking to weather proof. Was Hoping not to disconnect doorbell until I verified the voltage.
Old 09-18-2020, 09:56 AM
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It looks like the top part of the box you show. look for one that has the doorbell button wires.It only has two screws on it no spade plug things.
Old 09-18-2020, 10:01 AM
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Quote:
Originally Posted by gprsh924 View Post
That box is the only thing I can find that sort of looks like a transformer. I could check at the doorbell, however it on stone and has caulking to weather proof. Was Hoping not to disconnect doorbell until I verified the voltage.
The voltage will be between 12-24 volts. You can check it at the chime or buzzer.
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Old 09-18-2020, 10:03 AM
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That is a 24 volt a/c transformer.
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Old 09-18-2020, 10:20 AM
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Ok, I will check the voltage at the chime and go from there. My doorbell transformer must be somewhere else that I havenít located yet. However, as long as the voltage is in the correct range, I donít think I need to locate it for install.
Old 09-18-2020, 10:24 AM
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That looks like a fan control.

https://www.zoro.com/honeywell-center-fan-control-r8285a1048/i/G0934236/?gclid=EAIaIQobChMIyZqLjrHz6wIVZAiICR1wLgeqEAAYASA AEgI7e_D_BwE&gclsrc=aw.ds

https://www.amazon.com/Honeywell-R8285A1048-Center-Switch-Action/dp/B00QW2WSVE
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Last edited by fintstone; 09-18-2020 at 10:59 AM..
Old 09-18-2020, 10:53 AM
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Quote:
Originally Posted by sixbanger View Post
Did you remove door bell wires from that. I never seen a setup like that. Might be for heating system.
No problem...just push the doorbell for more heat.
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Old 09-18-2020, 11:05 AM
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Item on the left - yes.

The item on the right is a transformer. (Do a google search on doorbell transformer images.)
I'm assuming you've got a meter - what is the voltage reading on the terminals with wires connected?
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Old 09-18-2020, 11:08 AM
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Good call Fint, that looks like itís a fan controller. Finishing up some work, will check voltage at the chime layer this afternoon.

Old 09-18-2020, 11:10 AM
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