Last winter our furnace blew. It just quit working. Needless to say, that is something you don't want to happen during winter in Northern Illinois. It wasn't a total emergency, though, because it was in the 50's outside, plus we have a fire place. In any case, after calling around for service, we happened upon Mr. Kuehn's heating service. He promptly came out, identified the problem (the contact that ignited the gas burned out), and fixed it. Not only did he fix it, he showed me what to do if it happened again so I could fix it myself! A class act all around and a really nice guy! Highly recommeded!