The outside temperature shown on the thermostat and the one shown on the Nest Hub are not the same. They are connected to the same network, have the same address, etc. This is important because I have dual fuel and if the thermostat outside temp is too high, it will mistakenly run the heat pump. For instance, this morning the thermostat showed 38, the Nest Hub showed 33. Weather Underground's local station which is a mile away showed 33. So, the heat pump was running and shouldn't have been. One would think that all the devices would be synched.
I have the Nest Learning Thermostat. I also use Google Wi-Fi, have one Nest Hub, and three Google Assistants. They are all connected to Google Home. Google Home has my accurate home address as does the thermostat. The only troubleshooting I have done is to check and make sure the addresses were correct. My understanding is that they obtain the weather from Weather Underground. That is what I use and there is a weather station about a mile from my house. I also have my own unsophisticated station. We live in the mountains of Western North Carolina at 4,300 feet. So obtaining weather from a nearby station is critical. You can look 20 miles away and there may be a 10 degree difference (or more) because of the altitude. I had that problem with an Ecobee. Not only was it getting the weather from 20 miles away, it would only update every 12 hours or so.
I am just puzzled how presumably the Nest Hub and Assistants are getting the weather from the same place and the same time as the thermostat but they are generally different. Perhaps the thermostat is updating on a different schedule.
Two more things. First, I re-checked the addresses on both the thermostat and in Google Home. Thermostat was perfect. Google Home had the address, but when it showed the location on a map, the location was wrong. So, I put in the address again, and now the map location is perfect. Second, I compared the outside temp between the thermostat the Nest Hub and they still don't match. Even more interesting is that the outside temp on the Nest Hub display is not the same outside temp when you ask it what the outside temp is. The display said 46 and it said 49.
Gotcha! I'm sorry for the late reply, and I appreciate all the steps you've taken. A display of an inaccurate temperature reading is never ideal, especially if both Nest devices are getting the information from https://goo.gle/3aOeso7. But to clarify, is your thermostat working as intended without controlling it via the Google Nest Hub? If possible, could you please try to control it from the app and on the actual thermostat without the Nest Hub?
Let me know how it goes.
I'm using the Nest app to control the thermostat. However, the thermostat when using the programmed schedule works ok. The only issue, as described above, is if the thermostat thinks it is above 35 and runs the heat pump when it should not. The most helpful thing Google could do is make an outside temperature sensor.
Gotcha! Thanks for letting me know. I found an article that would help you adjust the lockout temperature. Also, restart your thermostat to refresh once the change has been made.
Keep me posted on how it goes.
Thanks, I know how to adjust the temperature, thing is sometimes it's too high and sometimes it's too low.
I believe I'm correct that the thermostat gets the temperature from Weather.com. I use Weather Underground which is owned by Weather.com but has more accurate information because you can pick a weather station closer to you location. For example, I live at 4,300 feet. The town nearest me is about 3,900. We could be 3-4 degrees different.
So, I'm going to create a spreadsheet with three outside temps, the thermostat's, Weather.com, and Weather Underground. I'm going to test at least once a day at the same time (s), maybe more. After a week, I'll post the results here. I have no idea how it will turn out, but it should be enlightening.
What I'm hoping is that maybe Google could get the latitude and longitude of the thermostat, then find a Weather Underground station close by. That would be optimal.
@jimdyal, thanks for posting here in the Community. How's it going with your Nest Thermostat? In case you have an update, let us know and we'll be happy to help.
I appreciate the help, Mark.