Home Service Blog Articles by Tiger®

Why is My Furnace Loud? 6 Possible Explanations

Published: March 19, 2014

small_2512086374You’re probably familiar with the sound of your furnace kicking on and air blowing out of your home’s registers. But when you start to hear banging, whistling, rumbling or clattering every time your furnace turns on, it can be cause for concern. So let’s take a look at some possible answers to the question, “Why is my furnace loud?” and talk about how you can fix and prevent the problem!

Why is my furnace loud? 6 possible explanations

  1. Gas burners are dirty. If dirt builds up on your furnace’s burners, it can cause your furnace to operate with a loud rumbling sound.
  2. Filter door loose. Many furnaces have a door or panel that must be opened or removed in order to access the air filter. If that door is not tightly shut, or if it’s loose, it can rattle around when your furnace is operating.
  3. Air ducts leaking. Duct leaks are common in Metro East area homes. Often times, air inside your ducts will escape out of those leaks and create a whistling sound when your furnace is operating.
  4. Unlubricated parts. Unlubricated parts, such as bearings, can create a high-pitched squeal while your furnace is operating.
  5. Unadjusted pilot light (older units). Older furnaces use a pilot light as their burner ignition system. If that pilot light is not adjusted properly, your might hear a clattering sound coming from your furnace.
  6. Worn blower motor belt (older units). Another feature of older furnaces is blower motor belts. These belts can wear down over time, or slip off the motor, which is another problem that can force your furnace to operate with a high-pitched squeal.

What should you do if your furnace is operating loudly?

With the exception of closing and securing your filter door, the problems listed above are best handled by a professional HVAC contractor like Tiger. We can inspect your entire heating system and determine the exact cause of the noises its making. After determining the problem, we’ll talk with you about what we can do to fix the problem.

One of the best ways to keep your furnace running quietly and avoid an extra call to Tiger is to schedule an annual tune-up before every heating season. A tune-up will bring your furnace up to its peak performance and efficiency levels while also solving any of the problems above before they become bigger issues.

If you have any questions about why your furnace is so loud, or if you’d like a heating system serviced or installed in your home, contact Tiger, your Glen Carbon plumbing, heating and air conditioning contractor.

photo credit: hebedesign via photopin cc

You Can Trust Tiger
True professionals
"Brian did an amazing job for us. A true professional!"
- Rob B.
Personable and efficient
"Mark was personable and efficient. I like the pictures he took for an explanation of problems especially since I couldn't get to the area that had the problem."
- Mike H.
We definitely recommend Tiger!
"My families a/c went out randomly today. I went around the house troubleshooting what I could. It got to the point where we had to call someone. We called the first places that showed up on google. Most places either wanted tons of money just for diagnostics, or couldn’t come out today. We called Tiger they went over the cost and they got someone out to our house in 45 minutes. Josh Moravec was our tech and was super professional, kind and intelligent. He was here for about 15 minutes before he figured out our issue. He went over in depth the cost and verified everything was good before getting started to resolve it. There was no pressure to buy the service if we didn’t want to. He went back down and in 15 minutes the a/c was running strong! He asked if we had any questions and then was on his way! He was great with our kids, very polite and courteous of me and my wife. He answered all our questions, and the price was more than reasonable. We definitely recommend Tiger, and make sure you ask for Josh Moravec if you can!"
- James L.
Prompt and ready to help
"Mark came within 24 hours and was prompt and ready to help. He fixed our problem in no time at all! I will be calling them again!"
- Monica J.
Professional electrical service
"We appreciate that Tiger was able to accommodate our appointment request the next day which was a Sunday. Tyler was on time and provided very professional service regarding our electrical issues we had."
- Anne N.
Professional, knowledgable and polite
"Service man was very professional, knowledgeable, and polite. Work was organized and every step taken was toward accomplishment of goal. System was repaired and returned to service promptly. I felt confident in the serviceman's performance and that my AC will work properly...satisfied customer."
- Walter B.
    See how fast we can get to you!


    Join Our
    Winning Team

    Here’s a Little More About Our Heating Services