You don’t have to be using your fireplace to notice it has a problem. Just opening the damper to check things out and see if there is a reason to call in a professional can lead to a discovery that something is up. Of course, even if you aren’t checking on your chimney out of habit, you might be led to look into its upkeep by a strange smell that seems to be coming from it.
There are several different potential causes for chimney smells and none of them are good. This applies to both gas and wood-burning fireplaces too so whatever type you have and wherever it is located, this article is meant for you. A stinking chimney isn’t one you should ignore because it will only get worse!