I programmed the thermostat but always goes back to the default settings, tried to reset it and also removed the battery and start all over, but still the same,
Anyone can help please

I programmed the thermostat but always goes back to the default settings, tried to reset it and also removed the battery and start all over, but still the same,
Anyone can help please
Consider trying a new battery. I see that you removed it, did you try another one, no matter how new the one in there is?