Ecobee Smart Sensor Won’t Connect? – Here’s How to Fix

Wondering why Ecobee smart sensor won’t connect to the thermostat? Keep reading!

The Ecobee sensor and thermostat are the ideal combinations, but for them to operate, they must be correctly paired.

The room sensor occasionally cannot connect to the thermostat because it becomes unavailable for unknown reasons so let’s unwrap this together!

The main cause of not connecting the Ecobee smart sensor is implementing the wrong way to pair both devices. If the pairing process is correct but they still won’t connect, the reason is always due to different factors that we’ll discuss in detail.

Let’s move further to find out more detail about the not connecting Ecobee room sensor!

Why Is Ecobee Room Sensor Not Pairing?

If your Ecobee room sensor is not pairing with the thermostat device, then of course something went wrong either with the device itself or in its surroundings.

Therefore, we must first look into the reasons why the sensor won’t be able to communicate with the thermostat in order to determine the exact fault. 

The following are common reasons for not pairing the Ecobee room sensor:

• Too much Distance between the Sensor and the Thermostat
• Software-related Bugs in Sensor or Thermostat
• Any electronic device Interference between both devices
• Dead Batteries of Room Sensor
• Outdated Firmware of Ecobee Thermostat
• Incorrect Pairing method to connect both devices

Now after knowing about the causes, we’ll easily troubleshoot the room sensor as well as the thermostat to fix the pairing issue in an appropriate way.

So, keep going!

How To Fix When Ecobee Smart Sensor Won’t Connect?

We are moving forward to discuss the effective ways that will make it simple for you to pair your thermostat with your room sensor.

But to ensure the best result from the guide’s discussed methods, you’ll need to ensure to follow every step completely because every step matters.

Solution #1 Power Cycle Sensor

Power cycling the room sensor is one of the quick and effective ways to address the connectivity issue within minutes.

It is very common for devices to get some unknown glitch with the system, that’ll prevent them from making communication with another device. 

Therefore, power cycling the Ecobee Sensor should be able to help!

Here is how to power cycle the Ecobee room sensor:

1. Turn OFF the room sensor. 
2. Remove the batteries from the sensor. 
3. Wait for about 5 minutes. 
4. Then put the batteries back into the compartment in the sensor. 
5. Turn on the sensor and try pairing it with the thermostat. 

Aside from power cycling the sensor, we will also recommend you to power cycle the Ecobee thermostat as well and make sure it is turned on and getting a power supply from HVAC! 

Solution #2 Replace The Room Sensor Batteries

Ecobee room sensor batteries might also often cause such connectivity issues among devices especially when the batteries are nearly at an end.

So, if you have not changed the batteries for a long time, then try changing them this way the connectivity issue will go away. 

Note: If your sensor batteries are fine, then feel free to move on to the next method.

Here is how to replace Ecobee room sensor batteries:

1. Remove the battery compartment cover from behind the sensor. 
2. Take out the batteries from the sensor. 
3. Set up a new compatible battery inside the sensor. 
4. Close the compartment cover. 
5. Then, try pairing the sensor with the Ecobee thermostat. 

Note: If after changing batteries, the sensor won't connect, then try the next solution!

Solution #3 Check For Interference

The long distance and interference between the devices, especially when they are trying to connect matters a lot.

So, check if the sensor is placed too far from the thermostat, then take it somehow closer to the Ecobee, and then try to perform the pairing process again! 

Place your Ecobee room sensor within the range limit of 35ft to the thermostat! 

Moreover, also check if there is any device placed between these two that may be causing the signal interference.

If there is any, then turn that off for a while or switch its place if possible and then try to pair both devices. 

Tip: Check your product manual for detail about the frequency interference that might interrupt the performance! 

Solution #4 Check Ecobee Thermostat Firmware

Outdated firmware of thermostats often causes issues with the device and that is why it is important to keep them updated.

However, the Ecobee thermostat automatically updates its firmware when the device is connected to the network as the update is released from Ecobee. 

There is a chance that your thermostat is not running on the latest firmware due to a network problem and software-related issue. Let’s find out together!

Here is how to check the Ecobee thermostat firmware:

1. Open the Ecobee Mobile App.
2. Go to the Main Menu.
3. Look for About from the menu.
4. Look for your thermostat Version Number.
5. Then, go to the Ecobee Latest Version update page!
6. Check whether the version you currently have is in the updated list or not.

If not, then connect your Ecobee thermostat to the network to update firmware automatically, which might take up to 15 minutes.

Be patient, since the time it takes to download and install the update is dependent on your WiFi/internet speed.

You can also contact Ecobee via Live Chat to update the firmware of your thermostat device!

Solution #5 Re-pair Room Sensor To Thermostat

If you are sure that the thermostat firmware is updated and the batteries are working fine, then you need to attempt the pairing again.

Because maybe the way you have previously used to pair the devices is incorrect and that’s why connecting Ecobee smart sensor is not working!

Here is the way to repair the room sensor to the thermostat:

1. First, hold your room sensor and remove its back cover.
2. Next, remove the batteries from the sensor.
3. Then, remove the Ecobee thermostat from the wall.
4. Wait for 5 minutes to give it a proper power cycle.
5. Next, place the thermostat back on the wall and turn it on.
6. Then, insert the batteries into the Ecobee room sensor.
7. Hold the sensor and take it near the thermostat.
8. Look at the thermostat screen and confirm the pairing prompt.
9. Connect the sensor to the Ecobee thermostat.

Note: If the thermostat and room sensor again won’t pair, then reset the room sensor!

Solution #6 Factory Reset Room Sensor

After attempting the aforementioned methods, consider factory resetting the Ecobee room sensor if the device still won’t pair.

This is the final and most-powerful solution that will erase any settings made to the room sensor so be prepared by backing up any settings!

Here is how to reset the Ecobee room sensor:

1. Open the room sensor battery cover.
2. Remove the batteries from the sensor.
3. Then, use your fingernail to lift up the prong from the battery compartment.
4. After that, place the battery back in the slot upside down for about 30 seconds! 
5. Important: Start from the positive side!
6. Again put the battery back into the slot, but this time, the positive side facing up!
7. Wait for about 30 seconds.
8. Insert the battery back into the compartment and close its cover.

Once you reset the room sensor, then again try to pair it to the Ecobee thermostat.

It’s only important to remember that the room sensor has to be near the thermostat while pairing them.

Need More Help?

In case after trying everything from our guide your devices won’t pair then maybe any of your devices are defective.

Therefore, we recommend contacting Ecobee Support via phone number or live chat to report the pairing problem that you’re experiencing. 

They will further assist you in fixing this device pairing issue so good luck!

Quick Recap:

Whenever your Ecobee smart sensor won’t connect, Power Cycle the sensor and thermostat, replace the batteries, and update the thermostat firmware!

The next step is to check for signal interference, and in case nothing helps, Factory Reset the sensor!

Visit our blog for more guides on the Ecobee thermostat!