You can make your furnace last quite a while, provided you take proper care of it. However, no amount of repairs and maintenance can make a system last forever. Sooner or later, you’re going to need a new furnace. If your furnace is not up to the task of keeping you warm through another winter, it’s important that you replace it now. Otherwise, you run the risk of it breaking down on you in the middle of a cold winter day. Read on for some of the signs that you need a new furnace.