I had a comfortmaker furnace installed in November, 1997. Ser# GNL100N16A. Every winter since I had this furnace, the heat sensor has giving me a problem. It cost me alot of money every year to have this fixed. I was told that this is common with a comfortmaker furnace. Can you tell me if this is true? Please E-Mail me back and maybe you can help me with this problem. Thank you Joe Urbanczyk