Transformer

It works - sort of. The output voltage is too high by approximately 10%-15% at the rated input voltage of 120VAC. If your power company boosts its transmission line voltage during the day, the output voltage will be even higher than the 10-15% it already over-generates. I'm guessing this is the result of a lack of manufacturing quality control at the factory in the Far East. Furthermore, one of the output terminal screws was stripped and couldn't be tightened down on the low-voltage wire to the furnace controller. I had to disassemble the output side of the transformer and re-engineer the mechanical arrangement of the screws, replacing them with longer 6-32 machine screws with thumb nuts to attach the wires. With this modification, the transformer is now a mechanical duplicate of the 70-year old transformer it was replacing. Also, the junction box cover plate supplied with the unit was way too flimsy to support the weight of the device. Use a standard junction box cover plate with a center knockout instead. I contacted Honeywell Technical Support and let them know about the over-voltage situation, the stripped screw (as well as my fix), and the flimsy junction box cover plate.

I bought this to power my ecobee smart wifi thermostat. I only had a two wire thermostat, so I initially bought one of those plug-in 24v transformers. That worked, but I didn't like the wire dangling along the wall, and I wouldn't be able to mount the thermostat perfectly flush. So I bought this and mounted it with included screw to a knockout in an adjacent light switch electrical box. I made one more hole in the drywall to fish thermostat wire from new transformer to thermostat, and viola, done! I tested the voltage with a Fluke multi-meter, and like the other reviews state, it does put out 27 volts; however, the ecobee powered right up, calibrated itself and is running now for a few days since install.I actually was concerned about heat output of this transformer, since a different branded 18v transformer that I bought to power a Ring doorbell, got really hot. I touched the transformer after install and powered, and I felt no heat. Now the hard part: Patching up the holes. [sigh]

Bought another brand recently that lased 3 days before it died. Should have paid attention to the 1 star reviews on this one as well. What was delivered was not what was advertised. No where did it say that this transformer was a Honyewell product and it was made in China , not the USA as advertised. Could not figure out why my New RING doorbell would not work with this transformer since it was one that came recommended for the doorbell having an Output of: 24 Vac at 40 VA. Finally, an electrician determined that this transformer was putting out 27 volts at the transformer and the doorbell that only requires 24 volts. Disconnected and hopefully when the real Honeywell transformer arrives, I will find out if my new doorbell has been fried or not. Learn from my mistakes, do not buy.

Do not get this for a Ring Pro Doorbell. I saw it was compatible but when I tried it all I had were issues. Instead, unless you have huge cable runs, get a 16vac transformer.I used the plate that came with this unit to mount it, so didn’t feel I could return it.

Replaced old doorbell transformer with this one to make sure Ring Pro would work. This worked just fine and was relatively easy to replace. If I had been a vertically challenged Ninja the replacement would have been easy because the issue wasn't with the transformer it was cause Murphy and his cousins installed the original in their prime spot. But at least we could find it.

Got this to be able to hook up our new Ring Doorbell security camera.. we decided it (Ring) needed to go on my office shed which faces down the driveway and has the largest distance view of our yard (we've had batteries stolen from my husband's boat, wires CUT and a gun, nothing else, stolen from our home.. more recently my brother in law spotted people cutting through our yard for no reason! We are in the country with no neighbors close).My office shed has no doorbell and we didn't want to worry about dead batteries. My husband and his brother installed, seems easily enough but I'm unsure how they felt currently.. and working well.

Works great, along with this resistor, (https://www.amazon.com/gp/product/B06XQWJ4JP/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1) , to hard wire power a Ring 2 Doorbell Cam. So far it's rocking along 8 months into it and I can't complain. It gets a little hot, so don't mount it by something you don't want melted or heat damaged. I mounted it to a floor joist, worked well.

I have three ring doorbells and they would randomly cut out and be down for hours or days then come back online. Some googling led me to the power issue. After installing this, all three doorbells are on and working without issue. The install was easy but finding the old transformer took a while. Nothing to do with the product, just that it was added to a random light box over a recessed light.

Lo uso para mi Ring Video Dorbell 2 con un cableado de aproximadamente 18 metros del transformador al video portero, usando cable de calibre 16 y una resistencia de 50w 25 ohm, y lo carga perfectamente; la batería nunca se baja del 100%. El único pero que le encuentro es, que como dice una de las reseñas que vi aquí en Amazon, el transformador entrega poco más de 24 volts... lo medí con un multímetro en la salida del transformador y me entrega 27 volts, lo cual hasta el momento no me ha dado problemas con el video portero (aunque en las especificaciones dice que sólo soporta hasta 24v y 40vac) pero me parece un error importante en el proceso de control de calidad del producto.Decidí conservarlo, debido a que hace el trabajo, aunque apostando a que unos pocos volts de más no afectarán a mi video portero dada la resistencia conectada y la longitud del cable.Otro detalle importante es, que al conectarlo deben de identificar correctamente la fase del neutro en la instalación de su casa, porque el conectarlos al revés en el transformador, si bien no es un error fatal, sí hace que la corriente no sea la idónea y la batería del timbre no se cargue adecuadamente. Si tienen problemas con la velocidad de carga de su batería, simplemente intercambien el orden de los cables en la conexión del transformador y eso hará el truco para que en unas pocas horas vean la batería de su timbre otra vez al 100% sin bajar de dicho porcentaje.

nice product

Honeywell for years and years has made the best Transformer don't buy any other product

Came quickly. Easy to install. No issues. Worked perfectly with my Honeywell WiFi Thermostat. I recommend it highly. Well done.

Excellent product