Outdoor temp wrong in 4th gen nest thermostat with google home

[Robteroy]

Hello fellow Googleites! I'm hoping someone can help me out.

I can't use my heat pump on my dual energy furnace effectively because the outside temp it's receiving from the Nest thermostat is 5 to 10 degrees celsius too high. If i set my furnace to use the heat pump, overnight and in the morning it runs continuously without heating the house. I've reset the thermostat and changed the location but it hasn't helped. Is there a way to fix this? Thanks.

[DeboraJ]

Hi @Robteroy,

Thank you for reaching out to the community! I'm sorry to hear that you're experiencing some inconveniences with your Nest Learning Thermostat 4th gen, as it is showing an incorrect temperature. Thank you for letting me know that you've already attempted some troubleshooting steps! Please allow me to assist you with this.

To begin, I need some relevant information:

• When was the thermostat installed?
• Where exactly did you install your thermostat (e.g., in a specific room, on a wall, or on a stand)?
• Do you have other active Nest thermostats?
• If yes, do they show the same issue?
• When did this issue first start?
• What is the difference between the temperature reading on your Nest thermostat and that of your separate thermometer or other thermostats?
• What is the brand and model of your HVAC/heat pump system?
• Is the problem continuous, or does it occur under specific circumstances?
• Have there been any recent changes to your HVAC system?

Once you provide this information, I will be happy to assist you.

Best regards,

Debora

[Robteroy]

Hi Debora. Thanks

The only thermostat in our house was installed in Feb. I believe, centered in our open concept living area. I believe the problem started a month later when I installed Gemini on my S23 phone because, both Gemini on my phone and my Nest thermostat show the same wrong outside temp for our location. If I ask Gemini the temp. of surrounding towns, they are all 5 to 10 degrees lower than our town. I've used Environment Canada, The Weather Network, Accuweather, etc. for readings. Our HVAC is Daikin.

Is there a different build of Gemini I could install? Not sure how to fix it.

Thanks

[DeboraJ]

Hi @Robteroy,

Thanks for giving me that information! Quick clarification: Gemini just displays the temperature your thermostat is already reading, so it's not the problem here. I've put together some steps for you to try next!

• Step 1: Restart the thermostat
  • On the thermostat’s display, go to Settings > Restart. The thermostat will take a few moments to restart and boot back up.
• Step 2: Turn on Sunblock
  • Open the Home app and select your thermostat.
  • Tap Settings > Temperature preferences > Sunblock.
  • Turn Sunblock On.
• Step 3: Check if the thermostat is near a heat source
  • Please check if your thermostat is located near any of the following:
    • Air vents that direct warm air
    • Appliances (including large televisions)
    • Electrical outlets
    • Plumbing (hot water pipes in old buildings are frequently not insulated)
    • Warm air in the wall
    • Other potential heat sources

Best regards,

Debora

[Robteroy]

Debora. Thank you for trying to help.

 Let’s try this again. The nest thermostat switches my HVAC from gas to heat pump and back according to the outside temp. It receives the outside temp from the internet. If the temp it receives is wrong, the thermostat changes which heat source it uses incorrectly. The heat pump looses efficiency as the outside temp drops. If it’s 0 degrees C outside but the temp it receives is 10 degrees the heat pump will run continuously without producing any heat costing more electricity and reducing the life of the heat pump.

I’ll try Sunblock. The thermostat is not near any heat source.  

[DeboraJ]

Hi @Robteroy

Thanks for the additional details about what's happening with your Nest Learning Thermostat 4th gen and for confirming that the device isn't near other heat sources. Please finish the steps and let me know the result so we can continue troubleshooting your device.

Keep me posted!

Best regards,

Debora

[Robteroy]

Hi Debora. Many restarts. Sunblock was on. No luck yet. The thermostat is centered in a large open concept room. The sun does not shine on it. It's 10 feet away from the kitchen stove. The wall that it is on has 1 electrical plug 4 feet away and a cold air return 5 feet below and to the left of it.

[Robteroy]

So just now my thermostat and Gemini/ Google assistant display 19.5 C outside while a town 2 miles down the mountain Gemini says is 15 C. Also a town 4 miles the other way Gemini says is 12 C. 

My weather station, my thermometers, Accuweather, The Weather Network all correlate with the other 2 towns but not the one I live in.

When I change the location in my Home app attached to Nest the outside temp

Nest displays is much closer to all my other temperature sources for where I live.

Google is retrieving incorrect temperature readings for Lumby British Columbia, but not the surrounding towns

[DeboraJ]

Hi @Robteroy 

Thanks for letting me know the results of those steps! I truly appreciate the information you provided and your efforts during this process. Let's try this next step:

• Step 4: Check the thermostat’s network connection
  • Make sure the thermostat is online.
  • Disconnect the thermostat from the Wi-Fi network for 24 hours to monitor the ambient temperature, and contact support afterward. To disconnect the thermostat from the network, select Settings > Network > Disconnect.
  • As an important note: If your thermostat's temperature readings return to normal 24 hours after it's disconnected from Wi-Fi, this indicates your Wi-Fi router is causing the heat interference.

Please try this step and let me know how it goes!

Best regards,

Debora

[Robteroy]

Hi Debora.

This pathway (Settings > Network > Disconnect.)to disconnect from the internet does not exist on my thermostat. I cannot find a way to disconnect.

Could you acknowledge that we are not talking about the thermostats temperature readings. The problem is the outside temperature being sent to the thermostat. 

[DeboraJ]

Hi @Robteroy 

Thanks for the information! I appreciate you clarifying that we're focusing on the outside temperature issue itself, rather than the readings. The steps I previously shared are a necessary part of our process. The team would like to learn more about this behavior, so when you get a chance, please fill out this form and let us know when you're finished. We'll have someone reach out to you via email from there.

Best regards

Debora

[Robteroy]

Will do. Thanks.