When your air conditioner is running smoothly, it’s easy to forget just how essential it is—until something sounds off. One of the most common (and alarming) noises you might hear is a rattling sound coming from your AC unit. If your air conditioner is rattling, it could mean several things, ranging from minor issues to signs that it’s time to call in the professionals at CPS Heating & Cooling.
So, what’s causing that noise—and is it serious? Let’s break it down.
Common Reasons for a Rattling AC
1. Loose Parts
Over time, screws, bolts, and other small components in your system can work themselves loose, especially with heavy use or age. A small loose part inside the unit can cause rattling when the AC is running.
2. Debris in the Outdoor Unit
Leaves, twigs, or small rocks can find their way into your outdoor condenser unit. When the fan turns on, this debris can bounce around and create a noticeable rattle. This is especially common during the spring and fall in Massachusetts.
3. Fan Problems
If your fan blades are damaged or out of alignment, they can cause a rattling or even a clanking noise as they spin. Continuing to run your system with a faulty fan can lead to more costly repairs down the road.
4. Failing Motor or Compressor
Rattling may also be a sign that your motor bearings are wearing out, or that there’s an issue with your compressor. These are more serious problems that should always be handled by a licensed technician.
Should You Call a Technician?
If the rattling continues for more than a few minutes—or if it's getting louder—it’s definitely time to bring in the pros. Ignoring the noise can lead to more extensive damage and higher energy bills if your system has to work harder to cool your home.
At CPS Heating & Cooling, we’ve been keeping Westborough and the Boston Metro West area cool and comfortable since 1991. Our team of NATE-certified technicians is trained to diagnose and repair all types of AC issues quickly and efficiently. Whether it’s a loose screw or a more complex repair, we’ve got your back.
Why Choose CPS Heating & Cooling?
24/7 emergency AC repair services
Honest, upfront pricing and expert diagnostics
Local, friendly team that treats your home with care
Trusted service throughout Newton, Shrewsbury, and Westborough
When your air conditioner starts making strange noises, don’t wait for it to get worse. Rattling may seem minor, but catching the issue early can save you time, stress, and money in the long run.
Ready to Fix That Rattle?
If your AC is making noise and you're not sure what to do next, give CPS Heating & Cooling a call at (508) 501-8848. We’ll make sure your system is back to running quietly and efficiently in no time.