Can I Install A Smart Thermostat Without A C-Wire

Are you on the point of set up a wise thermostat and realized there no c-wire or widespread wire? In that case, you could have come to the suitable article to resolve your downside.  

When my spouse and I not too long ago bought our first home, I was actually excited to check out new good residence merchandise, and the primary machine on our checklist was the ecobee SmartThermostats with Voice Management. 

Since we have been new owners, and we didn’t wish to be overwhelmed with excessive utility payments we determined to modify our current thermostat to a wise thermostat.   

From our analysis, having a wise thermostat vs a digital Thermostat can help to reduce our energy usage, which will then reduce our energy bill and permit us to have a extra sustainable residence. 

Additionally, by having a wise thermostat we’re capable of management our heating and cooling system by our telephone to regulate the temperature even when we aren’t residence.  

Now, after receiving our ecobee, studying the directions, and watching just a few smart home YouTube videos on easy methods to set up a wise thermostat, I was able to go. 

After eradicating the present thermostat, I realized there was one potential set up downside, there was no c-wire.  

Sadly, the earlier thermostat didn’t require one and most older houses would not have a C-wire put in. 

The excellent news there are a number of choices to put in a good thermostat and not using a C-wire, it simply takes some further work. 

The next are the steps I took on easy methods to set up a wise thermostat and not using a C-wire. Within the instance beneath, I used an ecobee thermostat throughout this set up.  

What’s a c-wire? 

Earlier than we start, let’s perceive what’s a C-wire also referred to as a standard wire? 

A C-wire supplies a steady move of electrical energy to your Wi-Fi thermostats which is related to your heating and cooling system

C-wire is often blue or black for 24-volt energy to the thermostat.  

The outdated thermostat didn’t require a C-wire as most usually run on two or three AA-battery. The older thermostat solely wanted sufficient energy for the small display show in entrance of the thermostat. 

Right now’s thermostat wants energy for geolocation, backlit show, and Wi-Fi performance. Sadly, and not using a C-wire related to some labeled terminal, you may’t use a wise thermostat.   

Methods to Install a wise thermostat and not using a c-wire 

Very first thing first, flip off the ability to the HVAC system. You can even do that by turning off the grasp change in your circuit field. The circuit field is often positioned in your attic, basement, closet, or storage.  

Subsequent, examine for a C-wire by detaching your current thermostat and have a look on the wires related to it.  

If you happen to see a terminal labeled “C” then you could have a C-wire, if there’s not, go to your furnace or HVAC system (often within the Attic, basement, or storage) and examine the supply.  

There’s a probability your HVAC management board has a standard wire that wasn’t wanted through the set up to your current thermostat, which the wire will be hidden within the wall. 

If there no C-wire on the management board, then in line with ecobee directions you will have to make use of their PEK or also referred to as the Energy Extender Equipment. 

The PEK adapter is used as a substitute for the C-wire and can solely work with the next, ecobee SmartThermostat, ecobee 4, ecobee 3, and ecobee Three Lite thermostats. 

Earlier than we go any additional, I want to state this. 

I am not an authorized electrician and in case you proceed, you might be doing this set up at your individual threat

For any cause you might be uncomfortable, you need to contact ecobee for directions or rent your native licensed electrician.  

Belief me, I perceive, as I was very nervous, particularly being a brand new house owner. I had no clue what I was doing, however I was prepared to attempt. 

Now, we have now that out of the way in which let’s start.  

Step – 1 Get out your instruments 

Earlier than you take away the wires from the backplate, double-check to see if energy is off with a voltage tester. If you happen to don’t have an electrical tester software equipment, you may find one at your nearest Home Depot

It’s all the time good to check the wires for energy earlier than touching them. Here’s a guidelines of the instruments you could want earlier than you begin: 

  • Drill 
  • Small screwdriver
  • Phillips screwdriver 
  • Hammer 
  • Pencil 
  • Wire stripper 
  • Voltage tester 
  • Flashlight 
  • Contact up paint (Use the identical paint and shade matching wall) 

Step – 2 Determine the outdated wiring 

After you confirmed the ability is off, the following step is to determine the outdated wiring from the present thermostat. After getting recognized the wires, begin eradicating and labeled them with every sticker label ecobee supplies. 

Or take a snap image of the wires which are positioned on the again of your outdated thermostat. I did each

Step 3 – Take away the present backplate 

Gently take away the backplate from the wall. It’s often held in place by two to 4 screws into the wall.  

Step 4 – Install the brand new good thermostat 

Now, right here comes the answer to the issue. Since we already established you would not have a C-wire, you will have to go to your furnace or HAVC system with the Energy Extender Equipment (PEK) adapter ecobee supplies you. 

Observe: The PEK requires sure wires to your system as a way to work. 

  • Four Wires: y/y1, R, G, W/W1 
  • Three Wires: R, y/y1, and G 

Open the furnace or HVAC cowl or covers off, and take an image of the wires which are related to the management board. This will probably be good for reference.   

Step 5 – Disconnect the wires from the management board 

Now you can label every wire as we did with the thermostat wires for help. Subsequent, disconnect the R, Y, G, and W wires from the management board, and re-connect them to the matching white terminal blocks positioned on the PEK. 

Step 6 – Install the PEK adapter 

When you label the wires, you may join the 5 white wires which are popping out of the Energy Extender Equipment to the terminals on the management board. Right here is an instance beneath of how your management board and PEK ought to look:  

Step 7 – Confirmed wires are related

After you’ve confirmed all of the wires are securely related, shut your furnace or HVAC system and return to the ecobee.  

Step 8 – Wiring your new thermostat 

Now, right here comes the straightforward half. Install the bigger trim plate for the ecobee. Pull the wires by the outlet positioned in the course of the backplate. 

Subsequent, insert every wire labeled to the matching terminal on the ecobee. On this order: 

  • R or RC wire – RC terminal 
  • G wire – C terminal 
  • Y wire – PEK terminal 
  • W wire – W1 terminal 
Ecobee larger trim plate
Labeled Wires to Ecobee Wall Plate Bracket

Step 9 – Flip your HVAC system again on 

Press your ecobee thermostat on the wall mount and click on it shut, and restore energy to your HVAC system again on!  

Ecobee Smattermostat with Voice Control
Ecobee Smattermostat with Voice Management Put in

Thermostat Troubleshoot

Our Air con received’t activate 

After restoring the ability to our HVAC, the ecobee powered on however we observed a difficulty, our air-con wasn’t turning on.  

We felt air popping out of the vents but it surely wasn’t cooling down the home. We went over the directions, examine all of the wires from the thermostat to the furnace, and guarantee they’re securely related to the terminals.  

There appear to be no connecting points, so, we gave it a day to see if something will change.  

We contacted ecobee help crew 

The following morning the air conditioner nonetheless wasn’t turning on, we determined to contact ecobee (877-932-6233) for additional help.  

We defined the issue to Devon from the ecobee help crew. To assist him determine any potential points we despatched clear photographs of the wiring from the ecobee thermostat, HVAC management board, and PEK.  

All the pieces I did was appropriate however there was a difficulty with the outdated wiring.  

As I talked about earlier, we not too long ago bought our first home, and the earlier proprietor of the home did a variety of {the electrical} wiring (DIY electrical work) himself which triggered the problem.   

Finally, we discovered, that we had defective wiring all through our residence however that’s a complete completely different matter for a later time

As soon as Devon was ready to determine an answer with out us calling an electrician, which might have value a whole bunch of {dollars}.  

He had me adjusted the wiring of the PEK adapter, which allowed the thermostat to correctly have interaction the air-conditioning.  

Can I Install A Smart Thermostat Without A C-Wire
Adjusted the wiring of the PEK adapter

Devon from ecobee was a lifesaver and helped us solved our downside with out spending any further value. 

Ecobee Smart Thermostat with Voice Control
Ecobee SmartThermostat with Voice Management Set up Accomplished

What to do in case your good thermostat will not be working correctly? 

In case you are operating into any points along with your good thermostat it could possibly be one of some issues. So, you’ll wish to make sure that you comply with the steps beneath to be sure that all the pieces is working correctly. 

  1. Examine the wiring at your good thermostat 
  1. Examine the wiring at your air handler/furnace 
  1. Examine the tools configuration 
  1. Examine your threshold settings 

In case you are nonetheless having hassle, contact the good thermostat firm or you probably have an ecobee, contact 877-932-6233 or send a message, for additional help.  

Methods to energy a wise thermostat with an exterior transformer? 

Now, to be trustworthy, I haven’t tried to put in a wise thermostat with an exterior transformer, however I thought this was an straightforward answer to the issue with out hiring knowledgeable electrician. 

A licensed electrician can value you a median between $200 and $400 to put in a brand new thermostat wire within the wall to your boiler or furnace. 

On this video beneath, he used a Honeywell thermostat throughout this set up, however this could work with any Wi-Fi thermostat and not using a c (widespread) wire. 

Video by Random Restore
24-volt transformer adapter
24-Volt Transformer Wire / C-Wire Adapter

In case you are all in favour of a 24-volt transformer adapter, you can find them on Amazon.

Ultimate Observe 

After I was accomplished putting in the ecobee good thermostat and not using a c-wire, it was an thrilling second to know I did it, and it really works with out hiring knowledgeable electrician to do the job. 

The one hiccup was the defective wiring, however I was capable of nonetheless do the job with some assistant from the ecobee help crew.   

Ecobee or any good thermostat makes the setup course of straightforward by both downloading the app, watch the YouTube video, or comply with the instructions that include the product.  

When you have questions you may all the time contact the corporate earlier than buying the machine.  

Due to ecobee, we will get monetary savings and management the temperature from the consolation of our mattress. 

Please, don’t neglect to take a look at the recommended gadgets web page for the most effective tech to your buck. 

For extra helpful suggestions and tips with Residence automation, please proceed to take a look at

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