Is your furnace acting up, or is it your thermostat that’s the problem? At Plomberie Chauffage Normand, you can count on our experienced team to install and repair a variety of heating systems, including hot air and hot water furnaces. We serve several cities on the island of Montreal, including Lachine and LaSalle. Here are a few tips to help you determine if your heating issues are due to your thermostat or furnace.