The C-Wire Issue

How to Install a Digital Thermostat Many older homes have outdated thermostats in which you turn a knob to set it to the desired temperature. These old thermostats can be inefficient and cause heating and cooling bills to rise. Upgrading to a digital thermostat is an inexpensive way to help cut your energy costs while also efficiently regulating the temperature in your home. Some digital thermostats are even programmable, so you will be sure to keep an even temperature in your home throughout the day. Because of all the benefits this simple home improvement can provide, learning how to install a digital thermostat is worth the effort to save money while making your home comfortable and cozy. Steps Purchase a digital thermostat from a home improvement or hardware store. Most of them simply pop off easily with a little force. There should be letters on the old unit next to each wire. Simply mark each spot with the tape with the corresponding letter on it. If the screw holes line up, you can use the old ones.

thermostat hook up for outdoor furnace(white rogers)

Originally Posted by bkdaniels The basic home or building electrical wiring is white or red hot , black neutral , Is absolutely incorrect, confusing the poster, and dangerous. If you are not absolutley sure of wiring, then you should not be giving advice. In the US, and Canada for that matter, the basic color code for volt wiring is:

I however do not like using these stats, as they will only break one of the two hot legs, and if the stat is off, there will still be one very HOT leg at the heater.

When I took the front off the current honeywell thermostat, it looks like there are quite a few more wires than what the new thermostat will accept. Do I need a different thermostat? Your current thermostat is designed to allow independent control of the outside heat pump and the inside auxiliary furnace two stage on the heat side. R — Hot side of transformer. C — Common side of transformer.

W2 — Heat Stage 2 inside furnace.

Hooked up new thermostat today and now heat pump is blowing

R — The R terminal is the power for the thermostat. This comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. For this reason, it is a good idea to kill the power at the condenser and the air handler before changing or working on the wiring at the thermostat. If you have a package unit then the transformer is in the package unit.

That way the house is at a comfortable temperature when you get out of bed.

Feb 20, , I only have 4 wires coming out of my wall. WOW I don’t know what kind of thermostat you had but I have never heard of terminals like you quoted. Here is the normal wiring on a four wire thermostat heating and cooling thermostat with out a heat pump. Red goes to the R terminal. The is the hot wire coming from the transformer. White goes to the W terminal this the wire that takes the power back to the gas valve.

Green goes to the G terminal This wire takes the power back to the AC blower relay. The other terminal on the thermostat is Y which takes the power back to the AC contactor. But since you have a black wire I am assuming that it is the wire that goes on the B terminal. Normally this wire is either yellow or blue. To test this wire out before you put the thermostat on touch the black wire to the red wire, have someone outside to listen if the condensing unit starts.

If it does that pretty well assures that the black wire is the right wire. Of course you can also do this with the white to see if the gas valve opens, If you have a newer furnace you may have a draft assist blower and this will come on before the gas valve opens, so if it does come on then the wire is right.

How to install the Honeywell WiFi connected thermostat

If you do need additional wires, you will want to consider how difficult installing new wires will be for your application, and if you need to budget for an electrician or hvac tech to install the proper wiring. Modern electronic thermostats are no different from any other technology, in that they can do more, but can also seem complicated to install and understand.

This article provides the basics of what to expect and look for when wiring a new or existing thermostat. With the many brands and models of thermostats existing, along with the numerous issues that could arise with corresponding devices, we suggest contacting the thermostat manufacturer technical department or have a professional local service tech do an inspection of your system if not operating properly.

A previous installer may have used a different set of color wires. This will be a non issue to keep track of if a whole new set of thermostat wires is pulled.

I know it for it a fact.

Caulking Gun Step 1: Plan Your Wiring I could have continued to use the 2 thermostat wires that were in my wall plus add 2 more wires that will run outside the wall to a nearby outlet where I would plug in the 24vac transformer. I didn’t like this setup because I didn’t want the wire to the transformer exposed where the thermostat was mounted. The installation would look much cleaner if all the wiring ran through the wall as it did previously. I needed 4 conductors. Two from the boiler and 2 from the 24vac transformer.

I was going to run the 5 conductor wire from my thermostat down to my basement and then I’d splice 2 more cables in the basement. One set of 2 conductors going to the boiler and two more going to the transformer which will be plugged into a wall. I used the same 5 conductor wire throughout except for the connection between the boiler and new wire where I used the existing 3 conductor wire.

There is no standard color coding for thermostat wiring.

How do I hook up new programmable thermostat in different room.

This thermostat is designed for a system with five wires — the wire terminations are marked as follows: W – This wire comes from the relay that turns on the heating system. Y – This wire comes from the relay that turns on the cooling system. G – This wire comes from the relay that turns on the fan. The two transformers provide the power the thermostat uses to switch on the various relays.

The relays in turn switch on the power to the fan and the air conditioner or furnace.

Your video, “How to install the Honeywell WiFi connected thermostat” will start after this message from our sponsors.

Below we will describe to you how to hook up a digital thermostat, hook up a programmable thermostat, or hook up any type for that matter. Whether the old thermostat is bad or not if you simply want to replace your old one and hook up a new one the first thing you need to take into consideration is to select the right replacement thermostat. To select the correct replacement you need to know what kind of HVAC equipment you have in your home or where you want to hook up the new thermostat.

There are numerous types of air conditioner and heating combinations so in this article we will cover a basic gas furnace and air conditioner split system HVAC system. Thermostat Wiring Colors Code – Learn More about the Thermostat Installation opens in a new window How to Hook Up a Home Thermostat If you do not know what kind of unit you have take a look at the paperwork from the last time the unit was serviced. Perhaps it will show the type of equipment on the service ticket where the unit had maintenance.

It is assumed that most people will know what kind of unit they have so that they can select the proper thermostat.

Hook up thermostat for Outdoor Wood Boiler

Mount the wall plate of the thermostat to the wall. Secure it to the wall using drywall anchors and screws. Pull the thermostat wiring through the hole in the wall plate and check it with a level to ensure it is level after installation. Then, Strip the outer insulation of the thermostat wiring back until approximately 2 inches of the six individual wires inside are exposed.

You’re supposed to pull the steel tape out by hand.

Someone with more control knowledge might help you if you want it all on one thermostat and it will have to be the correct model for doing that. The boiler is set at 74 and the gas is set at 70 or something. If the wiring and control is totaly escaping you you might want to invest in a furnace man for a few hours but you need to be able to tell him exactly what you want done which is simply switch the fan on high speed and off with a thermostat for the boiler heat and the gas furance and control gets left alone.

Now I dont want to add to your confusion at this point but the one and only potential problem with this type of control is that if you let the fire go out on the boiler the fan is going to run continuously as the thermostat is going to be calling for heat that cant be delivered, Got it? The gas furnace will still cycle its burner to maintain the heat setting of that thermostat but the boiler ‘stat is going to keep the fan running all the time.

This would be the only reason I can think of to have the second aqua-stat mounted somewhere to sence heat in the exchanger. No heat in the water, the fan cant run. For all the added complication I just plan to keep the fire going. If it goes out then I can shut the fan on switch to off or simply turn the boiler thermostat down and the fan quits running except when called for by the gas furnace.

Hooking up new thermostat to new furnace

This is often the case. Replacing the thermostat might initially appear to be a simple task, but once your remove the cover from your thermostat, you might become intimidated by the wires and connections. As long as you pay close attention to where the wires attached to your original thermostat, you can hook up the wiring on your new Honeywell thermostat model RTH B without mistakes.

You did one super job of explaining to me everything there is to know about this fridge.

Remove the thermostat cover and locate the wires from the furnace, then disconnect them. Label each wire with the labels supplied with the new thermostat. Remove the old thermostat from the wall. Spread the furnace control wires apart to keep them from falling behind the wall. Step 2 mark wall through mounting holes on base Install the New Thermostat Base Remove the base from the new thermostat and position it on the wall where the previous thermostat was located.

Use a level to make sure it is straight so the internal sensor will be accurate. Mark the wall through the mounting holes on the base. Remove the base and use your marks for reference to drill holes for mounting. Use a drill bit slightly smaller in diameter than the screws you’ll be using. Stuff the hole around the furnace control wires with a piece of paper towel.

Install a New Thermostat

Wireless Comparison The C-Wire Issue When you read through the reviews I have on my website, you will notice that lots of manufacturers state their thermostats need a common wire in order to work properly. My research has taken me on quite a journey in this respect, and so far I have come across three options that will help you overcome the common wire issue so many people suffer.

In this really short video you will learn how to connect an unused wire so it can be used as your C wire, which in a lot of cases has solved the problem of a thermostat not working. Before you take a look at the next video which explains how you can easily substitute the G wire for the C wire, please be aware this works best if you have a gas, propane or forced air conventional heating and cooling system. Using this method will also remove the ability to control you fan, however it will still run when your system does.

Adding a Transformer Yet another way to solve the whole C wire issue is to install an external transformer.

What is necessary is that the wires are attached to the terminals and they are tight.

To wire a thermostat, you must first be aware of the type of system that you have in your home. The thermostat wiring on these systems can have very similar wiring properties. But what if you have a system that’s a little different like a Heat Pump System, Then your thermostat is going to be wired a little different as well.

First and foremost when you go to wire a thermostat, if you have any doubt of the type of HVAC system you have and are uncomfortable with wiring, then I highly recommend using a qualified HVAC service technician to complete your task. This could save you a lot of unnecessary expenses in the long run. Now the thermostat circuits I will be covering will consist of the two scenarios I mentioned above.

But an important issue here is that the diagrams and wiring color codes are going to be the most common standardize method. Always keep in mind that who ever wired your thermostat may not have followed these procedures and your color codes will not match the following examples. You will have to determine this before you start disconnecting any of your thermostat wiring.

Mistakes made when hooking up a thermostat Avoid them watch