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in the Phoenix Metropolitan Area

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in the Phoenix Metropolitan Area


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Cool Touch Air Conditioning and Heating Blog

What the Heck is That Noise From My Furnace?


Of course, you’d expect some noises from your furnace here and there. For instance, the sound of air rushing through the vents is totally normal! However, there are some noises that your furnace should not be making, and if it is, it is definitely a cause for concern.

Below, we have outlined some sounds you definitely do not want to hear from your furnace and what they might mean. All you have to do is keep reading to find out more… Oh! And remember to call us for your HVAC in Glendale, AZ.

Keep Your Ears Open For…

Pay close attention to sounds like these:


A loud screeching sound is a sign that the blower motor, the mechanism that pushes heated air throughout your ductwork system, is not working properly.

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.

Clanking or Grinding

If what 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 to the wheel.

Bangs or 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. The gas builds up inside your system, and when it finally ignites, a teeny, tiny explosion occurs inside your furnace.

But do not fret. Your local HVAC professionals will be able to make those dirty burners squeaky clean!


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, which could lead to a carbon monoxide leak.

If you hear rattling, be sure to shut off your system and contact a team like ours right away.

You Need Professional Repairs

If you’ve heard any above-mentioned strange sounds coming from your furnace, it is best to contact a professional as soon as possible. Your local technician will thoroughly inspect your system to make an accurate diagnosis.

And yes, there may be plenty of amateurs willing to service your system for a questionably low price, but remember, sometimes an attempt to save money could end up costing you much more in the long run! Therefore, it is always better to call in a professional and get the job done right the first time around.

Ready to schedule your furnace repairs? Great! All you have to do is contact the team at Cool Touch today to get started! Kick Back and Relax. We’ll Keep You Cool.

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