Our thermostat stopped working after changing the batteries resulting in a very cool night. In the morning called Krane, explained the situation and mid-day Brian was at our house. He tried everything to make it work to no avail and recommended replacing with a new thermostat, which I agreed to. Since he was here I took the opportunity and explained the side of the house where the bedrooms reside that cold air was pumping out although they were physically closer to the actual furnace. After some investigation I was advised by Brian that there are two zones within the house and the second thermostat's batteries were not pushed all the way in to make the necessary contact. Since we thought that unit was an old one that was used prior to the previous owners renovation, I am thankful to Brian & Krane for not only squeezing us into their busy schedule but also going the extra mile over and above the original request to take the time to rectify the second zone.