Pull New Wire Up Through Wall With the new wire fished through the wall it was time to start wiring up the new thermostat. If anything goes wrong, and you want to hook it back up, you can refer to the photo later this is a good idea to do before disconnecting anything. Not sure why they can have videos of all the other ways to connect it but not an external power source explanation. Had been doing this with my Nest for 2 years. Photo from Almost there scenario: you find three or four thinner multicolored wires. I just had the fish tape and don't get to use it that often so I did. Sometimes, the common wire is hidden in the wall behind the thermostat.
I checked the voltage across Rh W and get 24V as I should. You could technically use the G wire connected to common at the furnace and common at the stat. In this case, we chose to give up control of the fan, to power our Honeywell Wi-Fi t-stat. The instructions for the I was installing didn't specify how to hook up an external power supply to the thermostat but calling customer service I was able to find out how to attach an external transformer. If you never run just the fan by itself with no heat it will work to move the G to C at the furnance. What benefit does the fish tape give me? Can I use the following two wire switch with my Ecobee 4 with Alexa? The Venstar company makes thermostats in addition to the Add-a-Wire and their support might be familiar with a greater variety of wiring setups. Other components such as fan timers, or wires that run to a condensate pump.
Wait, I have a line voltage. A c-wire is the best option and makes sure that your smart thermostat will have power as long as your house does. As my reach wasn't sufficient I walked down the tape to change where I was putting pressure. A device that draws less power can work with a higher rated transformer, just not the other way around. Using this method will also remove the ability to control you fan, however it will still run when your system does. You have a c wire! Our technicians will be glad to help you at any instant of time with immediate effect.
If you need to use drywall anchors for your install and you probably will , remove the back plate and install them now on your marked locations. Following this, connect the wires to the wall. Though a bit more money, I decided to try the Nest. I was a little worried with this high of a current when I've seen others that people have used with only 300 mA. You may want to take off the thermostat backplate and pull out the wires to see if the extra wire is there. When power sharing before the C-wire install the gas valve would short cycle constantly under a call for heating. You have to know the type of system you have.
Honeywell WiFi Thermostat wall plate, showing a typical 4-wire hookup. I called the 800 number that was in the installation instructions for the thermostat and I spoke to someone that really knew what they were talking about regarding the thermostat. The most common example of this would be if you only had R, G, Y, and W wires at your thermostat. To connect a C-wire to your furnace, you first need to make sure that your furnace comes equipped with a C terminal. In most cases, the hook up will be the same. So, while this is the most technical article I found in my search, it falls far short of true technical information. My unit has a heat cable connected to the thermostat, but this unit has no heat function.
I have seen this answer, but don't understand how a 2nd transformer, connected with one side of the secondary connected at 'C' of the thermostat, will allow a current sink for the electronics which are supplied with 'hot' from the furnace transformer seems like spooky action at a distance. The logic is the Mercury ones work well and never had issues, and they are hard to buy. The Yellow and Blue wires will run along another wire that goes to the plug-in 24vac transformer that will be plugged into a nearby outlet in the basement. You should also check if you have a ventilation system panel. While downstairs next to the boiler I used my phone to turn the thermostat down and within a few seconds the boiler turned off.
This is, in our opinion, the best option if you can swing it. These first few options assume you have a low voltage system. If you touched your R wire to your C wire already and saw some sparks, your thermostat might not be working. Here is a step by step instructions how to replace your old thermostat with your new smart thermostat. I bought t5+ honeywell thermostat which has c adapter.
Then, come back here and follow along! You may need more or less depending on how far you have to run the wire. The first being your method. Skip the guessing game and make the process move quicker by knowing your wires. Do I have a hidden C wire? Make sure to verify the voltage and amperage requirements with your thermostat specs. Connect your trim plate of choice to the ecobee3 back plate the back place is the piece with the wiring terminals on it , thread your thermostat wires through the round hole in the middle, then press the whole thing up against your wall. Be careful when tightening down the terminals. Before you start disconnecting any wires, however, snap some photos showing how the existing wires are connected to your old thermostat.
The thermostat is next to an opening I tend to bump into when I go down to grab a glass of water in the middle of the night. Welcome to the future Newer thermostats that offer clocks, backlit displays, WiFi, etc. The run the two wires coming out of the other side of the relay to R and W going to the furnace. The addition of a fourth wire, either with an adapter or new wires, could act as the C-wire if properly wired to the furnace. As Tom mentioned, wifi can suck when wifi isn't working. These new circuits require a path for electricity to return to the source, and so require an extra wire. No idea what to do at this point, can anyone please help? I would imagine this is ok? This is because the thermostat basically works like a switch, connecting the R wire to the C wire through control circuitry.