Google NEST-SNSR Google Nest Temp Sensor WHITE white

I purchased a Google Nest 3rd Generation Learning Thermostat in late August of 2022. It worked fine until early January 2023 when it started displaying an error message stating it could not connect to my Wi-Fi network. My wife and I both tried to get it to reconnect and could not get it reconnected to our Wi-Fi network which has a very strong signal. My Wi-Fi network has been the same network during this time, and no other devices in the house including phones, tablets, laptops, printers, cameras and numerous other connected devices have had any Wi-Fi issues during this time. I called Google tech support and they talked me through a bunch of steps including several ‘master reset’ attempts and it did briefly reconnect to the network, but within an hour had disconnected from the Wi-Fi again. I called Google Tech support a 2nd time, and they determined my unit was defective and needed to be replaced. They wanted me to send the thermostat back to them, and then they would send a replacement. Considering it is the middle of winter, and I can’t have a house without a thermostat, I asked for another (faster) option to get their defective unit replaced. They said the only option was to charge credit card for a replacement unit, and then when I returned the defective unit to them, they would remove the charge on my credit card. I reluctantly agreed to this (because I had no other option). When the replacement unit arrived, I discovered it was not a new unit but a ‘reconditioned unit’. When I went to install it, it would not power up, so I called Google Tech Support (3rd call to Google). They helped me to determine that the battery was dead on the replacement unit, and I had to charge the unit on a USB cable before installing it. The next day (after charging it for 24 hours) I tried to install the unit and it again would not make it through the start up menu. It alternated 2 error messages (1. Disconnect unit from the wall 2. Reconnect unit to the wall) depending if the unit was on or off the wall. So, I called Google support again (4th call) and they determined the unit was defective. I requested they send me a brand new unit this time, but I they said that was not their ‘process’ and they would send another refurbished unit. I protested to no avail. They said I would have to send back the defective refurbished unit before they could send me another replacement (All this time I have been using the original Nest from August because it at least functions as a DUMB thermostat, it just can’t connect to Wi-Fi or run schedules). So, I sent the defective refurbished replacement back and then waited almost 2 weeks for them to send another refurbished unit. I think during that time I called Google support 2 more times trying to get the status of the replacement. That 2nd replacement unit arrived 2 days ago, and again the battery was dead. I charged that unit for 1 day, and then reinstalled the unit, and again found it would not make it through the startup menu. It alternated 2 error messages (1. Disconnect unit from the wall 2. Reconnect unit to the wall) depending if the unit was on or off the wall. I again had to call Google tech support who again determined this 2nd replacement unit was defective. I again begged for a new unit, and they again would only send a replacement by charging my credit card again. That third replacement arrived and was another refurbished unit with a dead battery and had to be charged to get it to work. That unit worked from mid-February to unit midmid-April (2 months). However, on the first really warm day, we turned on the AC and our outdoor unit started making a loud clicking noise. I assumed there was something wrong with the motor or fan on the outdoor unit and schedule an HVAC repairman to come diagnose the problem the next business day. That repairman came today and spent about 2 hours troubleshooting the issue and he determined that the Google Nest was not sending a consistent signal to the AC unit causing the outdoor unit fan to intermittently shut off/on repeatedly. Obviously, I had to pay for that service call which was not cheap. I just purchased and installed an EcoBee Thermostat and it, and my HVAC unit are now working fine. I just tried calling Google to ask for a refund for my Nest and the Google Nest Remote temperature sensor, and they have refused to refund my money. They only want to send me yet another refurbished unit, but after all these problems, I am not willing to try that. So now, I am out almost $300 for the Google Nest and the Remote sensor, but also out another $100 for the HVAC service call, and countless hours trying to get the Google Nest to work. This is absolutely the worst piece of technology that I have ever purchased. Google’s tech support was completely inflexible to offer any solutions other than just more refurbished units. If I could have rated this product lower, I would have.