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Why Is My Furnace So Noisy?

Furnace Have you heard some funny noises coming from your furnace recently? This is a common complaint and, although it is quite common, it is in your best interest to know what may be causing this nuisance. We know how important it is to have a fully functioning, quiet furnace, especially during the chilly months. If your furnace is making strange sounds, it may be time for furnace repair in Chapel Hill, NC.

Some Common Sounds

Figuring out the type and source of the sound is an important step in resolving the issue. We have listed some of the most common sounds that homeowners may hear:


This may be a sign that your blower motor isn’t functioning properly. Your blower motor is responsible for turning the fan that circulates warm air into your home. It may be that your fan has stopped altogether, or it may just be a matter of needing routine lubrication.

Either way, it’s best to contact a qualified professional to accurately diagnose and take the necessary steps to fix the problem.

Clanking and Scraping

If you are hearing what sounds like metal against metal, this can be an indication of a significant problem with your furnace’s blower wheel. Most likely, the blower fan has become loose and is scraping the blower house casing.

If this is the case, turn off your furnace and contact a local HVAC professional immediately. You want to avoid causing further damage to the blower wheel–it can be a big expense!

Bangs and Booms

A dirty burner may be causing those loud bangs you hear. The noise is caused by a delay in ignition. To put it simply, the gas builds up and, when it eventually ignites, a small explosion erupts inside of your furnace.

A dirty burner can be dangerous, so it is important to keep yours clean with regular maintenance. Cleaning the burner is never something we’d advise, so it is definitely recommended that you call a service technician to do the job safely.


A rattle may just be a symptom of a loose screw or a loose panel. However, if this is not the case, then it may be something much more serious. This sound might be telling you that you have a broken heat exchanger on your hands. This is typically caused by a lack of airflow from dirty filters, blowers, or coils. Excess heat build-up can lead to a cracked heat exchanger. This is a serious issue, as it can lead to a carbon monoxide leak in your home.

To avoid this problem altogether, regularly scheduled cleanings and maintenance are a must! That is why we offer our Peak Performance Plan to our valued customers. When you enroll in this plan, you not only get the benefits that routine heating maintenance has to offer. You get many additional benefits that are only available to plan members. Check out everything that our Peak Performance Plan has to offer here.

Keep your family safe and warm this winter season. Contact Ideal Heating and Cooling to schedule your regular furnace maintenance today .