Why Is My Furnace So Loud?

When you’re a homeowner (especially a novice homeowner), every sound in your home can be unsettling. After all, when you move into your house, you’ve not only invested a massive sum of money, but you’ve also pinned your hopes and your family’s future on those four walls. So, when unexpected noises rattle your home, you inevitably want to know what’s wrong.

No home noise is more unsettling than excessive clamor from your home’s furnace. Millions of Americans own furnace-based heating systems, and most of them get a little nervous when they start causing a racket. Not to worry, though—if your furnace is making some noise, here are some signs you could require further furnace repair in St. Louis, MO.


When your furnace kicks on and a squealing noise soon follows, it often means that you’ve got a loose belt somewhere in the motor. If you address the problem quickly, it should be a relatively cheap fix. If squealing is left unattended, it could lead to more severe issues with your furnace.


If your furnace turns on as usual and completes a heating cycle without issue, but then lets out a home-rattling rumbling noise, then you could be in trouble. A loud rumble often indicates that your furnace is combusting fuel even after your pilot light has turned off. If your furnace is rumbling, call a company to schedule furnace repair in St. Louis, MO as soon as possible.

Loud humming

You’re likely familiar with the typical noises associated with your furnace. There’s an assertive click when it turns on and a light humming noise as it completes its operation cycle. When that typically muted hum turns into something loud and ominous, you could have an issue with your furnace’s fan or capacitor. A professional HVAC technician should be able to diagnose the source of the problem.

Popping noises

One pop when your furnace turns on is natural. If that popping noise continues during your furnace’s operation, it could mean that your furnace’s burners are dirty. Leaving the popping sound unattended could lead to the accumulation of gas on your burners, which could eventually cause dangerous problems.

Let the pros make a diagnosis

You shouldn’t have to sit and scratch your head wondering, “What is wrong with my furnace?” Schedule furnace repair in St. Louis, MO with Ashley Brothers Heating & Cooling! We have more than 20 years of experience offering a comprehensive range of residential and commercial services to our valued customers.

We specialize in the installation, maintenance and repair of AC systems, furnaces, ductwork, air filters, humidifiers and more! We can even make sure your furnace or heating system is clean and ready to go before the cold weather sets in. Don’t be caught in the cold—Ashley Brothers Heating & Cooling will send a highly-skilled technician to diagnose your problem and then fix it. Your heating and cooling problems will be a thing of the past when you work with us. Call today to schedule your appointment.