24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable)

Needed to upgrade old thermostat . Was looking for a thermostat that would work without a c-wire and be updated. Found a few that were a smart thermostat and didn’t possibly need a c wire. So ended up needing a c wire in order for the wifi signal to be able to work. This plug transformer served the purpose. I ended up feeding the wire up from the basement through the wall into the thermostat wall plate just like the old wires there. That help keep it clean , no wires showing. I plugged it in one of the light fixture that had an outlet. After that all was good and my thermostat was fully functional. No trouble as of 2 months . Quality seems well made , enough length in the wiring to have no issues reaching an outlet.

Wanted to upgrade my thermostat to a smart stat and have been putting it off due to not having a C wire, and being intimidated by the c wire adaptor. Finding this invention made my day and was very simple to install with instant results.

Exactly what wad needed to supply constant pwr to my wifi/ thermostat on my rv travel trl....works perfect......

The transformer supplied enough power for the Honeywell home thermostat. Too bad it was made In China.

I bought this deliver constant power to my new Sensi Smart Thermostat. It was VERY easy to install - just cut the jumper wire between the RC and RH contacts on the Sensi and connect one of the wires of the transformer to the RC-contact and the other to the C-contact. Then plug in the transformer into the nearest AC outlet. No more loss of Wi-Fi connectivity! The transformer has a supper long wire in case the closet AC outlet is far away from the thermostat.

Yep, worked great. Kept the device online all the time and powered up.

Super happy with this product. I didn’t have an existing C wire for hooking up my new Wi-Fi smart thermostat. I’ve been wanting one for a long time. It gets hot in my bedroom, and who wants to get out of bed and walk downstairs to adjust the thermostat when you’re trying to sleep? I wasn’t even aware I didn’t have one until I went to install the new thermostat. It’s my first experience wiring up a thermostat, so it was a great learning experience. The C wire is basically a 24v power supply for your newer thermostats. My home is pretty old, it originally had an old style thermostat with a mercury switch. This thing is easy to wire up, it has two wires, you can use either one to send power to the C input and the other one, for me, had to go into RC. Which I assume must be for grounding. The length of the cable was more than adequate for me. Getting the wire to my thermostat wasn’t easy. I have a hole in my wall, the wires run behind the wall and down into the basement where there’s a small hole in the floor boards. I can’t believe I pulled it off, but it actually worked and it didn’t even take long with some help from my daughter. I took some fishing line and connected a lead sinker to the end and poked that through the hole in the wall. It dropped down onto the floor and I had my daughter move it around until I could see it, and grab it with a set of very narrow needle nose pliers. Once I had it into the basement I wrapped up the C wires and zip tied them so the couldn’t come lose and pulled it back up through the wall. It actually worked. I ended up running the wires along the ceiling of my basement and plugging it into an outlet down there against the wall so it can’t accidentally get yanked out of the outlet. Now I can change the temperature of my thermostat without needing to get out of bed. This thing worked perfectly for me, I have only a small amount of experience wiring and I was able to get this done perfectly and safely. The price is fair. Saved the day for me.

I wish I had purchased this 24V transformer earlier as it solved my issues. The situation I had was my forced air heater only uses the R and W wires on the old thermostat I had. I had an Ecobee 3 that I was looking to install and after reading through the documentation, I realized I needed a C wire. Luckily the wiring in the wall had 3 unused wires in the bundle (out of the 5 total). Originally I used one of these wires and tapped into the common 24V connection point on the heater. This seemed to work as the Ecobee powered on, however the screen would shut off randomly at times. I initially suspected that the cabling contacts were poor and replaced the wirenuts which did not help. I ultimately found that the thermostat was receiving enough power to turn the screen on, however not enough to fully function. I ended up purchasing this thermostat which addressed the issues (using 2 of the wires in the cabling bundle already in the wall). The reason I purchased this transformer over others was that it was comparably priced however included extra length in the cable which I figured could come in handy if needed. It did not come with any wirenuts so you'll need to account for that in your setup. The only thing that would make this product better is if the power adapter itself was not as large, however all these transformers are similar in that regard. A short 1ft extension cord fixes that easily.

Ya tengo como un mes que lo instale para un termostato, y me ha trabajado satisfactoriamente.