I needed to change password, but at the verification stage it kept ttelling me that I didn't enter the correct code or I did not do it quick enough. Yet, I double checked the code to make sure that I entered it correctly and did it within seconds of receiving the code. After numerous attempts, the system told me I had tried to many times. One hour later, I went to bed. I do not want to buy another thermostat because I have had this one for years and it has worked terrifically well.