What Can Cause A Furnace To Make A Constant Rattling Noise?
Modern furnaces should always be relatively quiet while they're turned on, so a constant rattling noise coming from your furnace is a sign that something is wrong. A rattling noise is typically an annoyance rather than a cause for extreme concern. However, it's important to find out the source of the noise — if it's coming from the heat exchanger, you'll need to fix it as soon as possible in order to prevent harmful gases from entering your home.