How to Set Up the Nest Thermostat

Did you just get your new HVAC system installed and are trying to set up the Nest thermostat? Fear not — we got you covered. In this article we will describe in details how to properly add your Nest thermostat to the app, how to connect the wireless sensor and how to troubleshoot the thermostat.

How to Add Your Nest Thermostat to the Nest app

  • Connect your Nest thermostat to your home’s Wi-Fi network.
  • Press your thermostat’s ring to open the Quick View menu.
  • Select the Settings icon.
  • Choose Network.
  • Your thermostat will take a moment to scan for available networks. Choose your home Wi- Fi network from the
  • Enter your Wi-Fi password if prompted
  • Download the Nest app.

Download the Nest app.

Download the app for free from the Apple App Store or Google Play

Create a free account in the Nest app

  • Press Sign up on the Nest app login screen.
  • Enter your email address and choose a password that’s at least eight characters long.
  • Once you’ve signed up, you’ll receive a confirmation email.

Note: Once you’ve confirmed your free account, you won’t be able to add your thermostat to the Nest app until the
thermostat provides the entry key.

Connect the Nest to the phone app

  • Press your thermostat’s ring to open the Quick View menu.
  • Choose Settings.
  • Turn the ring to Nest app and press the ring to select it.
  • Select Get Entry Key to retrieve your unique entry key.
  • Open the Nest app and sign into your account if prompted.
  • From the home screen, tap Settings.
  • Tap Add product.
  • Tap Continue Without Scanning and then select the type of Nest thermostat you’re trying to add
  • Choose Thermostat already installed
  • Follow the Nest app’s instructions. When prompted, type in the entry key on your thermostat’s screen

Once you’ve entered the key, the Nest app will add your Nest thermostat to your account and allow you to control it
from the convenience of your phone or tablet.

How to Connect a Wireless Sensor to the Nest thermostat via Nest App

  • Open the Nest app
  • From the Main screen, go to Settings
  • Go to Add product
  • Locate the QR code on the sensor (on the piece of paper or under the back plate), then Scan the code
  • Attach the Sensor to the Nest thermostat. Go to Settings
  • Choose the sensor
  • Click Associated to. To choose the thermostats, this sensor should connect to
  • Set Sensor schedule. Go to thermostat Settings (in the app)
  • Click Manage sensors
  • Choose when the system will use a Thermostat built-in sensor and when the system will use a wireless sensor (for example, at night)

Troubleshooting Nest Thermostat: the Nest Sensor Lost Connection to the Thermostat.

If the Nest sensor quit working. It’s a relatively easy fix. To reconnect the sensor:

  1. Go into Settings on the Nest thermostat
  2. Go to Reset
  3. Click Restart (do not scroll down and delete everything on the thermostat).
  4. When the thermostat resets, check sensor connection via the app again.

We hope this article was helpful for you to set up the Nest thermostat. And if you need professional HVAC assistance, please do not hesitate to contact us — call (408) 898-1576 or drop an email at and we will be happy to help!


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Deena D.
Deena D.
Very nice, knowledgeable, and helpful technician. Provided the options and associated costs. Would use this company again.
Ron B.
Ron B.
We chose Fuse to do the HVAC portion of our home remodel and we're very happy with their work! They installed a full Mitsubishi Mini-split heat pump system all throughout our house in 6 rooms. It was a massive job and they did the work relatively quickly and efficiently. The supervisor, Maxim, was very friendly and knowledgeable. Out of several bids that we got, theirs was the only one that gave us everything we wanted at a competitive cost. We'd be happy to recommend Fuse! We also had Fuse Electric work on the electrical portion of our home remodel, for which I wrote up a separate review.
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Pablo L. D.
Great service. They respond really fast and did a great job fixing my thermostat issues.
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Manu B.
We got our duct work completely replaced in our 50 yr old home. They recommended the work, other companies didn't do this much due diligence and mentioned about asbestos but FUSE technicians went step ahead and climbed into attic and our crawl space to ensure there were no asbestos to begin with. Honest people and very competitive if not best quote I got. Moreover the installer, David and Jeremy worked 2 long days non stop to get work done at our home with 100% satisfaction. David explained everything to me and provided other recommendations for future. He is the most honest technician I have encountered in so long. Because of David I wouldn't hesitate to work with FUSE again. Thank you for such a great work. Very happy and highly recommend FUSE!!
K R.
K R.
The technical crews were excellent; very knowledgeable and capable. They were able to do our HVAC, water heater and ductwork replacement even when faced with several unexpected and very challenging situations. David in particular worked some very long hours to get everything installed correctly. The administration side had a few glitches, but everything worked out OK. I would recommend them, but if you are eligible for the Penninsula Clean Energy interest free loan, be sure to apply for it before the work is completed.
Matthew J.
Matthew J.
Exceptional service from FUSE HVAC! They installed a Mitsubishi HVAC system in our home, and we couldn't be happier. The team was professional, knowledgeable, and efficient throughout the process. Our home is now perfectly comfortable year-round, thanks to their expertise. From consultation to installation, everything was seamless and hassle-free. Highly recommend FUSE HVAC for anyone looking for top-notch HVAC solutions!
Amitabha C.
Amitabha C.
Fuse HVAC installed Mitsubishi Heat pump in my house and completed the project on 31st March 2024. David and Jeremy started the project and David finished the installation. David worked Saturday and Sunday until 11 PM to complete the work. It took 4 1/2 days. I am very happy with the work that David performed. I was watching the process of installation of the pump and was very satisfied to see that after finishing each step David will spend 10-15 min inspecting the work that he did to make sure that there was no mistake. The result was that during pressure testing to check for gas leakage or when the heat pump was run there was no unanticipated issue. The new ductwork that was installed by FUSE passed the HERS test. FUSE is also installing the attic fan to keep the air circulation going and keep the attic cooler. FUSE was referred to by my friend who used them for installing a similar heat pump and although they were a little more expensive than a few quotes I got from other vendors, I decided to go with them based on my friend's recommendation. I had made a right choice! My only criticism for FUSE is they are not able to estimate the time that it will take to finish the project. They told me it will be done in 3 days but it took 4 1/2 days. My project needed the air handler to be moved to the attic but because the space which had the gas heater was too narrow for the air handler. On the whole it was a good experience working with FUSE. They kept us warm for two days with heater fans and David worked Easter Sunday until 11 PM to install and start up the system without hurrying up at any step to get the installation completed earlier. A big thanks to him and to his assistant Jeremy!

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