In the course of your adult life, you will face one question at least twice – whether to repair or replace your old furnace. Fortunately, there are many warning signs which can help you make this determination. It is important to note that replacing a furnace before it needs to be replaced is a waste of resources and also a costly process. On the other hand, repairing an old furnace which needs to be replaced will force you to fork out hundreds of dollars in repair costs on a regular basis, which can be extremely costly. It is therefore important for homeowners to watch out for warning signs and make the right decision when the time comes. Click through to learn some tips and warning signs that will help you decide whether to repair or replace your furnace.