
No furnace can last indefinitely, and there’s no such thing as “the last heating system you’ll ever need to buy.” Even in warm Southern California, furnaces gradually wear down from use. In fact, homeowners often neglect to have routine service for their furnaces because they don’t rely on them often. This will speed up the furnace’s decline.
If you’ve come to this post, it’s because you suspect your furnace is past its expiration date—whatever that may be. What is considered “too old” for a furnace? We’ll take a look at this question, which has several answers.