It’s normal to hear clicking noises coming from your HVAC system when it turns on or off. Your thermostat has to communicate with your heater or AC to trigger heating and cooling, and it may click during this communication process.
But if you hear a clicking that is persistent or continues while either HVAC system is running, something is wrong. It’s easy to ignore clicking because it is not always loud, but you definitely want to pay attention and get expert help if you do hear a persistent clicking sound from air vents. Keep reading to learn more about what that clicking sound might mean and why it can be dangerous.