We want to start off by saying if you hear clicking from your furnace as it cycles on and off, and the sound hasn’t changed since you’ve gotten your furnace, then you might actually be hearing your ductwork shift a bit as the temperature of the air inside of it fluctuates. This is normal, and as long as there is no change and you’re having your furnace professional inspected once a year through maintenance, you have nothing to worry about.
If, however, a new clicking sound has started, or it sounds like it’s coming from another part of the system, then you’re right to be alarmed. This clicking could be coming from a crack on the heat exchanger, and it’s clicking as it contracts back into place when your furnace cycles off and cools down. Why is this a problem? Read on to find out!