Modern HVAC systems silently work in the background to maintain a comfortable temperature in the indoor environment. These machines tend to produce little to no sound. But if you start noticing loud HVAC noise, then it may indicate the machine needs repairing.
Heating, ventilation, and air conditioning units may give loud banging, humming, or clicking noises. These strange sounds can later turn into big repair bills. You should know what type of noise it generates to find the right solution. For this purpose, you should inspect indoor and outdoor units.
Humming HVAC Noise
AC systems normally produce a low humming sound. But is your HVAC making a loud humming noise? Then these unusual noises may indicate something is wrong.
The system meanders throughout your home. And it may be difficult to pinpoint the exact source of the noise. So, you should check various system components in turn for HVAC banging noise.
Occasional HVAC noise may indicate that maintenance is due. But it can also signal the need for repair work or replacement of parts. You should never ignore such sounds. This way, you can prevent major and expensive repair work down the road.
Duct Noise
The duct system is usually made of sheet metal. It comprises various dampers, pipes, plates, or valves that regulate sealants and airflow. You may often hear a low sound of air exiting the vents in your room. But make sure you watch out for loud and strange sounds.
Popping and Rattling Noise
An HVAC system can produce popping and rattling noise sometimes. This occurs when loose metal pipes knock against each other. As your system ages, the sealant loses its efficacy. And static pressure can cause ducts to come loose.
If your HVAC system has clogged filters, it may block airflow. Hence, it may result in a pressure drop, leading to vibrating and shaking ducts. Buzzing and scratching in your ducts may be because of squirrels, raccoons, bees, or mice that enter your ductwork.
Not everyone is an HVAC expert. So, it’s best to contact an HVAC professional to determine and resolve the root cause of HVAC problems.
