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Review on Universal 24V 40VA Thermostat / Doorbell Transformer: Compatible with Honeywell, Nest, Sensi, Ecobee, Nest Hello, and Ring Doorbells by Stephen Doyle

Name: Universal 24V 40VA Thermostat / Doorbell Transformer: Compatible with Honeywell, Nest, Sensi, Ecobee, Nest Hello, and Ring Doorbells
Item: Universal 24V 40VA Thermostat / Doorbell Transformer: Compatible with Honeywell, Nest, Sensi, Ecobee, Nest Hello, and Ring Doorbells
Rating: 3

July 10, 2023

26.5v on 100' run and fried Ring DB Pro!

This transformer is way too hot for Ring Doorbell Pro. The output of this transformer at the doorbell was 26.5v and it fried it. I returned the Ring Doorbell Pro to Costco and bought their Doorbell 2 (in warehouse) bc I didn't feel like extending my weekend doorbell replacement project for another week. Before installing new doorbell, I bought a 3 output regular bell transformer from big warehouse hardware store. Used the 16v output and measured 18.5v at the bell. It powered it flawlessly and my project is done.

Pros

Easy to install and works great with ring.

Cons

Users may need to purchase longer cables or extension cords to reach the desired location

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Comments (1)

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Chris Moody

July 14, 2023

I was getting 27 volts at the terminal. 10% over maximum label is too much. My Video door bell was over powered. I also want to echo the thin gauges of the wire the other reviewers mentioned.

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