Thermostat was installed by the contractor when we purchased a new system. Thermostat has NO AUTO MODE to change between ac and heat. In Ohio at times you need ac during the day and heat at night and with current technology you would think this would be an option on a digital thermostat that is internet connected, it is not. The purpose of getting a SMART thermostat is to not have to constantly changed your thermostat from ac to heat multiple times a day. I would not recommend you get this thermostat.
The T6 is an excellent Thermostat that is very intuitive and easy to use. On the other hand, I cannot give it a 5 star rating because of bugs in the HoneyWellHome iPhone app. In order to get accurate temperature readings from the thermostat, don't leave the app running on your phone in the background and then switch to the app when you want to modify the thermostat. When doing this the app doesn't always get the correct information from the thermostat. I have found a workaround by always exiting the HoneyWellHome app. Do not leave it running in the background on your iPhone. Whenever I want to adjust the thermostat, I invoke the app, do my adjustment, and then exit the app. This ensures that the app will get the correct information from the thermostat every time. Please fix this app bug and then I will change the review from 4 to 5 stars.
Software is poorly designed.Too many useless features and menu steps. Should not need degree in computer science to set this up on internet. Took Honeywell tech 45 minutes to set up. I have had both thermostats removed and another brand installed. This customer gives this product a do not buy rating. There are better products on the market.