Skip navigation

Ideal Services Heating & Cooling Blog

Don’t Ignore These Crazy Furnace Noises!

In general, furnaces are relatively quiet. Other than the occasional sound of air whooshing through your vents, you shouldn’t really hear much else. So, if it sounds like your furnace is throwing a wild party in your basement, then now is the time to call in a trained HVAC professional for help.

See, there are a number of sounds that you definitely don’t want to hear coming from your furnace, and below, we have described a few of them for you. All you have to do is keep reading to find out more (and of course, remember to call our team when you need furnace repair in Durham, NC.)

Keep Your Ears Open For…

Here are are some of the sounds you don’t want to hear from your furnace:


A loud screeching sound is a sign that the blower motor in your furnace is not working properly. (The blower motor is the mechanism that pushes the heated air throughout your ductwork system.)

It could be that your blower motor needs lubrication. However, a screeching sound could also suggest that the fan has stopped altogether. Your local HVAC technician can assess your system to make an accurate diagnosis.


If the sound you’re hearing sounds like metal-on-metal, it could be that there is a problem with the furnace’s blower wheel. If this is the case, it is important that you turn off your furnace and contact a professional as soon as possible to prevent further damage.

Bangs and Booms

In many cases, the bang or boom sounds you may hear coming from your furnace indicates a dirty burner. The noise is caused by a delay in ignition due to dirt build-up on the burner. If this is the case, you are going to want to have a professional clean your burners right away! Please do not attempt to do this job yourself.


Rattling can indicate a number of issues, from mild to major. Sometimes, it can suggest that there is a loose panel or screw somewhere on or within the furnace. In other cases, it could mean that there is a crack in the heat exchanger.

Over time, temperature fluctuations inside the furnace can cause the heat exchanger to crack, which can become very dangerous. A cracked heat exchanger could allow carbon monoxide or other harmful gasses into your home.

Get on the Phone with a Professional

When the time comes to schedule your heating repairs, be sure to do so with a professional. Trust us, only a certified HVAC professional has the tools, training, and expertise to safely and correctly handle the complex needs of your system, the first time around.

And sure, there might be plenty of Average Joe’s willing to service your system for a fairly cheap price, however, an attempt to save money could end up costing you an arm and a leg. It’s always best to call in a pro — when it comes to your comfort and your budget, you don’t want to take any risks!

Schedule your heating repair services with the team at Ideal Services Heating & Cooling today!

Comments are closed.