I called Friday and waited 1 1/2 hours before I hung up. I couldn't wait any longer.I called today and waited 1/2 an hour before someone answered and she could not help me and she told me that someone wold call me back. She took my name and number. I'm still waiting. In the mean time, when you call,please have an answer my question ready. My question is : " If I ever have your Thermostat installed, correctly, and I have a problem with it within the 1 year warranty, and I take it off the wall and send it back to you,how cold will it get in my house because my HVAC System has no Thermostat On The Wall ?? !! "