Literally died one day after the return window

[STEVE_SZY]

Man I HATE this thing. I installed it June 5 2023 and it has left me questioning if it was the thermostat or my one year old AC/Heat Pump. It's the thermostat. It died this morning of a dead battery. 

Since I installed it, the thermostat will occasionally run the heat instead of cooling. I have the thermostat in COOL mode, but for some reason it would just randomly start using the heat. I would reset the thermostat and it would go back to cooling. Except once, I had to shut it off for over an hour before it would reset. 

It worked okay for the last three weeks, then this morning 4am, I wake up and it's hot. The battery had died, and for a good punch in the face the thermostat turned the heat before going offline. My house was 96 inside and only 85 outside. I pulled the thermostat from the wall, charged it with the USB rapid charger, for an hour, still showed a low battery. Put it back on the wall to see if I could get it to function, yeah turned the heat on again. 

I have read other webpages that had better descriptions of trouble shooting. The suggestion was that my line voltage was too low. I tested through the Nest Thermostat, 23.7volts instead of the required 24.1. So I tested with a multimeter, and It showed 24.2. 

I have been watching my energy usage through my APS webpage over this last month. Surprise! My energy consumption went UP from 976 kWh last year (which was also about 6 degrees hotter overall) to 983 kWh and it was all in peak demand hours (6-7pm). So this is definitely due to the change in thermostat. My trend in power usage was the same or less the rest of this year. 

I bought this through Amazon, my last day to return this was July 1st. And of course it's the 2nd. I reinstalled my old dumb thermostat, my home is cooling off nicely now, and I'm out the $199

[Thll]

Same here. Thing is the worst purchase 

[CoolingWizard]

@STEVE_SZY , sadly, if you purchased the thermostat direct from Google, and used Nest Pro Service to install it, you would have a 3-year warranty.  Now when you installed the Nest Learning Thermostat, did you encounter any problems as part of the installation? Did you perform the heating and cooling test and did it work correctly at the time of installation?  If you say the Nest is reported voltage as 23.7 Volts AC power, what was the reported current? Did it state 200mA? If so, that is the maximum and the charging circuit should have been able to keep your built in battery charged.  This data, as you are aware, is found in SETTINGS > TECHNICAL INFO > POWER.

AC Cooling Wizard

[STEVE_SZY]

I went through all the steps, tested when prompted, wired it as the diagram showed, and everything functioned as it should. For the first few days.

I don't recall what the line amperage was. I already removed it and reinstalled my dumb stat. No way I'm suffering my Sunday in 100º+ temps inside my house if I don't have to. 

With the thermostat off the wall, plugged into a known rapid charger for over an hour and I can only get the battery level to what I assume is a 1/4 full mark, I am going to assume the battery is no good. 

Still doesn't explain why it keeps cycling my heat on in cooling mode. 

When it first started cycling the heat on, I set a schedule and watched what it would do, I set my overnight temp to 78, then after 6am to 80. Instead of shutting off and letting the temp rise naturally the heat would come on and raise the temp. It was in "cooling "mode not "heat and cool". 

If I can get a refund on this. I will just go with a standard old programable. 

[Thll]

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@STEVE_SZY wrote:

I went through all the steps, tested when prompted, wired it as the diagram showed, and everything functioned as it should. For the first few days.

I don't recall what the line amperage was. I already removed it and reinstalled my dumb stat. No way I'm suffering my Sunday in 100º+ temps inside my house if I don't have to. 

With the thermostat off the wall, plugged into a known rapid charger for over an hour and I can only get the battery level to what I assume is a 1/4 full mark, I am going to assume the battery is no good. 

Still doesn't explain why it keeps cycling my heat on in cooling mode. 

When it first started cycling the heat on, I set a schedule and watched what it would do, I set my overnight temp to 78, then after 6am to 80. Instead of shutting off and letting the temp rise naturally the heat would come on and raise the temp. It was in "cooling "mode not "heat and cool". 

If I can get a refund on this. I will just go with a standard old programable. 

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Steve you have been duped here. It's a crap product and it's your fault for buying it 

[CoolingWizard]

@STEVE_SZY I always advise my customers to charge the display for 6 hours.  Google recommends 4 hours.  When I sell a nest to a customer, we charge it for 24 hours.  

AC Cooling Wizard

[zoeuvre]

Hi folks,

Thanks for reaching out to us, and I'm sorry to hear about the situation. I want to check if you managed to see the response above. Please let us know if you still have questions or concerns, as we'll be willing to assist you further. 
 

I appreciate your help, @CoolingWizard. 

Best,

Zoe

[STEVE_SZY]

I love how everyone just ignores my core issues with this unit. I'm not going to recommend anyone. And I notice there is no method of downranking any of the responses. 

The battery had died and does not recharge. 
The heat keeps randomly turning on when it did work, regardless or schedule or mode. 

And that the thermostat used MORE energy, not less over a months usage.

I have since contacted two AC service companies, both did not recommend using Nest Thermostats siting issues like the heating problem. I am definitely not satisfied with the product, and the after sales service is worse than helpful. 

If you would really like to help, arrange for a refund for this thing. 

[STEVE_SZY]

One month on with my dumb steady state thermostat and an average temp about 10 degrees hotter in the day and 20 hotter overnight, and I use LESS energy. 

No resolution to this, no refund from Google or the seller, they got their money so F-me. This is the future of things. Get used to it.