7 Ways To Fix Nest Sensors Not Connecting.

7 Ways To Fix Nest Sensors Not Connecting.

The Google Nest sensor is a useful device for optimizing the performance of a Nest thermostat, The sensor will tell the temperature in the room where it is placed, and then the thermostat will use that reading, rather than its own built-in sensors, to determine the behavior of your HVAC system.

These sensors are good at saving energy, lowering your bills, and keeping your home temperature as comfortable as possible, but the problem is when the connection between the sensor and thermostat breaks.

When the sensor loses contact, the thermostat does not get the room temperature accurately, resulting in house temperature imbalance and potentially high power consumption.

Why is my Nest sensor not connecting?

There are many reasons that can cause your Nest sensors to lose connection such as the distance between the thermostat and the sensor, Bluetooth connection interference, low or dead battery, device incompatibility, and more.

Ways To Fix Nest Sensor Connectivity Issues.

The following chapters of this article will guide you through some of the solutions you can rely on to get your Nest sensors connected again without having to call a pro.

One: Make sure the thermostat is compatible.

When purchasing Nest Sensors, you first need to check if they are compatible with your actual thermostat because the company made these sensors to only work with the Nest Learning Thermostat 3rd generation, and the E model and are not compatible with the Nest Thermostat mirror version.

If you’re currently trying to use Nest sensors with another brand or a device that isn’t compatible, the sensors won’t work at all and please don’t continue to read the article because you’ll waste your time.

However, thermostats designed in countries other than Canada, the United States, or Mexico are currently not compatible with the sensor, the app prevents you from adding the sensor to a thermostat designed for use in any other country.

Two: Reboot the sensors.

If your thermostat is compatible and your sensors are not connecting I recommend starting by rebooting the Nest sensors and seeing what happens, as these troubleshooting steps help you resolve many issues such as connectivity problems, slow device response, and software issues and keep your gadget running smoothly.

Follow these simple steps to reboot this little device:

  1. Remove the battery.
  2. Wait for 30 to 60 seconds.
  3. Put the battery back in.

Rebooting your thermostat can also refresh the device and solve any issue that’s preventing the connection between these two gadgets, all you need to do to power cycle it is to turn off the switch on the circuit breaker, wait for a few minutes then turn it back On.

Then check if your device is back to work after this power cycle process, if not go to the next solution.

Three: Replace the battery.

The Nest Temperature Sensor comes with a CR2 lithium battery that can last up to 2 years and when the level of this battery is low, the overall performance of the device will be reduced, which will prevent it from connecting.

A notification will be sent to your phone and you’re gonna be alerted in the Nest app when the battery in a sensor is low, If you wait too long your sensor powers down and stops reporting temperature data, it gets listed as offline in the Nest app, and you need to replace the battery to get it to work again.

To replace the battery, insert a coin into the slot on the back of your sensor and turn to unscrew the battery cover, you can purchase a new battery at a local store but make sure to choose a high-quality model.

Four: Reduce the distance between the sensor and the thermostat.

As we mentioned before the Nest sensor is battery-powered and it doesn’t work with the thermostat through wiring, it works and exchange data using Bluetooth Low Energy (BLE) and has a range of about 50 ft (15 m).

So if you see that the distance between the sensor and the thermostat is more than 50 feet, the problem is caused by the long distance, all you need to do to get your device connected again is to shorten that distance by moving the placement of this sensor.

Five: Eliminate the causes of interference.

When the Nest Sensor communicates with the thermostat via Bluetooth communication protocol it needs to be away from interfering devices that may be in the same spectrum such as Microwave ovens, Wireless Wi-Fi speakers, cordless phones, and neighboring Bluetooth gadgets.

Six: Too many sensors connected to the thermostat.

A Nest thermostat can support up to 6 sensors but it can only use one at a time (choose which room in your house is most important, or set a schedule so your thermostat uses different sensors at different times).

Although the thermostat can connect to six sensors, having too many connections may cause breakage and connection problems, so be sure to reduce the number of sensors if not necessary.

Seven: Mobile Bluetooth is On.

The Nest sensor and the thermostat are linked on the Nest app, and they connect and share data using Bluetooth communication protocol, so your mobile’s Bluetooth needs to be turned on to let these two devices exchange information without any problem.

To turn on Bluetooth on iPhone:

  1. Open Settings.
  2. Go to Bluetooth.
  3. Tap the toggle switch to the right of Bluetooth to turn it on.

To turn on Bluetooth on Android:

  1. Swipe down from the top of the screen.
  2. Tap on Bluetooth.
  3. Then the Bluetooth button turns green.


So this article has covered everything you need to do to reconnect your Nest Sensor to the thermostat without having to call a professional and I hope it was helpful to you.