Your furnace is comprised of a complex network of mechanical components. The noise you hear when equipment is running are the parts working together to supply heat to your home. Although a soft hum of the equipment vibrating is normal, contact an HVAC contractor if the noise turns into popping, rattling, whistling, or any other unfamiliar sounds. Often, the noises are warning signs of underlying appliance issues, as outlined below. 

What Odd Furnace Noises Could Mean 

Loose Parts Could Cause Rattling 

If you hear a rattling noise, the sound of metal scratching on metal, or banging against the furnace walls, power down equipment and call an HVAC contractor for assistance. They will investigate inside the chamber, as these sounds are often caused by loose or broken mechanical components. Continuing to use equipment could cause more damage, as the loose parts can dislodge other components as they move around. The sounds could also be caused by air moving through loose ducts. A technician can apply more screws to secure the channels in place.

Clogged Filters Cause Whistling Noises

The filter traps dust, dirt, and additional debris sucked through ducts before it reaches the blower and causes damage. If the screen is clogged, air can’t pass through the system. In turn, the fan will suction air through any small holes or spaces. The pressure causes a whistling sound. If replacing the filter doesn’t solve the problem, there could be gaps in the ducts. In this case, the commotion could be air seeping out of the channels. 

Dirty Burners Could Cause a Loud Boom

Scheduling regular heating service is important, as technicians can clean, inspect, and maintain equipment to prevent dangerous malfunctions. When burners are caked in grime, for example, it could slow down the ignition process. Gas will accumulate in the system, increasing the risk of an explosion. If you hear a loud bang or popping sound, dirty burners could be behind the noise.

If you’ve noticed strange sounds coming from your furnace or central air equipment, contact the professional HVAC contractors at Apollo Refrigeration in New Haven County, CT, for help. With over 40 years of experience, the technicians will diagnose equipment problems and provide effective repairs to restore household comfort and cut down on energy costs. They’ll also provide tips to improve heating and air efficiency between professional appointments. To schedule a heating repair service with an HVAC contractor, call (203) 777-6291. Visit their website online to view a list of their services.