New Berlin, Wisconsin
16935 W Greenfield Ave.
New Berlin, WI 53151
(262) 784-6440

3 Common Heating & AC Unit Sounds May 15, 2019

New Berlin, Waukesha
3 Common Heating & AC Unit Sounds, New Berlin, Wisconsin

Whether you hear booming, clanging, or popping, if your HVAC system is making strange sounds, don’t wait to investigate. The last thing you want is to discover that your AC unit has broken down on a hot summer’s day or your heat isn’t working in the middle of winter. Here are a few of the most common HVAC system sounds and what they might mean.

What Are the Most Common Heating & AC Unit Sounds?

1. Scraping

A metallic scraping sound likely means a part inside of the system is broken or has come loose. The issue could be uncomplicated like a loose wheel on the motor that simply needs to be tightened. Alternatively, it could be more serious, such as a broken motor that needs to be replaced.

2. Rattling or Banging

ac unitA rattling or banging noise likely indicates a duct issue. Rattling suggests a foreign object, from a children’s toy to a vent screw, has fallen into the ductwork. This is especially common if you have floor vents. A banging or popping sound could also indicate accumulated dirt in the ducts, leading to a delayed ignition. In either case, it‘s likely time for a ductwork cleaning.

3. Hissing

A hissing sound is bound to mean a leak in your heating or AC unit. It’s likely the result of air escaping from the ducts and into the walls of your home. This is not complicated to fix, but it should be done promptly. You are losing energy when ducts aren’t properly sealed and secured, meaning higher utility bills and needless money lost.


If you suspect your heating or AC unit is in trouble, contact Donovan & Jorgenson for help. These HVAC contractors have been serving the Greater Milwaukee, WI, area since 1985. You can expect prompt and friendly service at reasonable rates. They provide free estimates and are available 24/7 for both business and residential repairs. Visit their website to request a quote.

Other Announcements, Events and Deals from Donovan & Jorgenson
The Do’s & Don’ts of Preparing for an HVAC Installation , New Berlin, Wisconsin
When you schedule an HVAC installation, certain preparations are necessary before the contractor and equipment arrive. Taking the needed steps will ensure that you get the full more
3 Causes of Air Drafts in Your Home, New Berlin, Wisconsin
Many times when homeowners notice a spike in their energy bill, the problem stems from air drafts somewhere in the house. These air leaks force your HVAC system to work harder and more
How Are Oil & Gas Furnaces Different?, New Berlin, Wisconsin
If you’re looking for a new furnace to battle the Wisconsin winter, you’ll need to choose between replacing your current system with a natural gas or oil model. While both more
Why Isn’t My Home Heating Evenly?, New Berlin, Wisconsin
Finding cold spots in your home when your furnace is running doesn't always mean your HVAC unit is faulty. In fact, this issue is common. Here’s a closer look at why this problem more
A Guide to Changing Your Heating & Cooling System’s Filter, New Berlin, Wisconsin
Your heating and cooling system keeps your home comfortable all year long. In addition to having a qualified HVAC contractor service it annually, you need to change its filter on a more