Wi-Fi 7-Day Programmable Thermostat (Open Box)

If I could give it zero stars I would. I purchased this thermostat almost exactly 2 years ago this month. I read 14k predominantly positive reviews, but remember reading a review that it only lasted 2 years! I thought what are the odds? Well they weren't in my favor and the thermostat crapped out after 2 years! First I had a problem with functionality but that was because my C wire wasn't connected at the furnace. I called my HVAC guy a friend and he connected it and it worked. Then I tried connecting it to my wifi, initially there was difficulty connecting, I did everything the manual stated but it didn't work. So I called tech support followed the same steps over the phone and it connected. I didn't want anything overly complicated so I chose this thermostat. I'm basically home and increase, decrease the temperature when I want manually or by the app. Which is not great, takes several seconds to connect. Once it disconnected from my wifi, couldn't reconnect so I logged in from their website and reestablished connectivity, it happened again. So the app is meh. It's summer here and it's hot and I don't keep the air conditioning on too low don't like it cold but I came home two evenings ago and it felt warmer than usual. I thought the air conditioner should go on soon and cool off. After a few hours it was still warm so I checked the app to lower it and it was disconnected and couldn't reconnect to my wifi. So I went to manually do it and the display was BLANK! I freaked out as it was so hot and humid. Too late to call tech support so called the next morning on my way to work. They told me to check the voltage in the wires, basically the electricity. I already turned all my circuit breakers on/off the night before and the furnace had a steady red light. I later read that a steady red light was no signal from the thermostat as the number one reason and a few of others like electricity, furnace door is open, pilot lights, problem with the furnace but I knew it wasn't any one of those reasons. When I got home I texted my HVAC guy since I don't have a voltage analyzer and he never got back to me, guess I have to find a new guy, company which will be expensive because he was my sister's ex and a friend...no more! A friend of my mother's knows about electricity and came by today and connected the white and red wires which should turn on the heat of the furnace, it didn't work. Then I read to turn on a/c connect yellow and red and it didn't work. So I thought I needed to call my electrician, but decided to check my furnace in the attic and turned it off then on and viola it went on! Kept the a/c on for several hours until the house was cool, then disconnected the wires. I tried the white and red wires and the heat went on. So it's not electrical never thought it was because everything was working but the thermostat! The warranty is only 1 year so I'm now trying to find a better thermostat, hard to do, pros/cons with many including the most popular round one that didn't get great reviews and I don't like the interface. But DON'T BUY THIS!