Listening to a sound.

Why is My Furnace Making that Noise?

If you've heard strange noises from your furnace, you're not alone. In most cases, these noises are nothing to worry about. However, it's important to know what they could mean to determine whether you need furnace repair. In this blog, Jack Frost Heating & Air Conditioning, LLC will discuss the most common furnace noises and what they could mean for your system.

Scraping and Buzzing

Worn or broken bearings in the blower motor usually cause scraping noises. If this is the case, then you will need to have your furnace looked at by a professional as soon as possible. Buzzing sounds may be caused by a loose part within the furnace itself, a problem with the electrical circuitry, or an obstructed vent. It's important to check these issues out immediately as they can cause further damage to your system if left unchecked.


Humming noises could be due to dirty parts or clogged filters that prevent air circulation. Sometimes, it may also be caused by dirt and debris build-up on the fan blades inside your unit. To determine whether this is the cause, you can open up your furnace and check for any blockages or build-ups.


Finally, squealing noises typically indicate that the belt of your unit is out of alignment or has worn down over time. A professional technician should address this issue as soon as possible to prevent further damage to your system.

It's important to note that while some furnace noises are normal, others can point toward a much bigger problem. If you notice strange sounds coming from your heating system, it's best to contact a professional immediately to assess the issue and ensure that everything is running smoothly.

If you need furnace repairs, don’t hesitate to contact us at (973) 520-0505 or fill out our online contact form to make an appointment.