Are you suddenly struggling to hold a conversation over your air conditioner? Have you been startled awake by squealing, rattling, or even banging? Are you constantly wondering, why is my HVAC so loud?

If so, it’s clear that something isn’t right. 

Thankfully, you’ve landed on the right blog post. Keep reading for 4 common causes of a loud HVAC, plus tips on what you can do about it!

1. Belts and Bearings

If you’re hearing rattling, squealing, screeching, or even banging, you don’t have a faulty HVAC unit. Instead, you likely have a belt or bearing that’s worn out. 

While this might sound like a major issue, in most cases, it’s a small and straightforward repair. Schedule HVAC service and let a certified technician find the worn-out part. Then, you’ll be back to blissful silence before you know it!

2. Improperly Sealed Ductwork

Have you heard a constant hissing sound or high-pitched hum? If so, the issue is likely in your ductwork.

You might have a broken seal or even a coolant leak, so don’t wait to get a professional out to take a look.

In some cases, this type of sound can also result from too many of your home’s vents being closed or blocked. But, it could also indicate an error in your original HVAC installation.

3. Outdoor Debris

Is there a loud rattle coming from your outside unit? If so, you might have fallen victim to an issue caused by often overlooked HVAC tips concerning your fan and condenser.

Have a look at your outdoor unit. Is it completely clear from debris? Often, these loud sounds are the result of twigs, branches, and other debris caught inside.

You should call a professional to remove the debris if you notice anything lodged inside or if you see signs of damage like bent metal. It’s also essential to keep all plants, bushes, and yard decorations at least 3 to 5 feet away from your outdoor unit.

4. Thermostat Issues

If you only remember one tip from our noisy HVAC guide, make it this one!

A constant clicking or tapping sound could indicate an issue in your thermostat. And, if left untreated, this problem can quickly escalate.

If your thermostat is struggling to communicate with the HVAC unit, it will click on over and over again. This can cause it to wear out well before its time, leaving you with a non-functioning air conditioner. 

Have a professional HVAC tech inspect your thermostat, and ensure that it’s receiving the proper signals from the rest of your unit, and turning on and off as expected.

Still Wondering, Why Is My HVAC So Loud?

Even if the cause of all that commotion is small, it’s time to call in the pros. Otherwise, you risk damaging your HVAC further, which could add up to hefty and unexpected service bills.

Contact Sewell Electric and HVAC or call (615) 794-2518. We have decades of experience serving thousands of satisfied Franklin and Williamson County residents just like you. 

Let us take a look at your unit, and we promise you won’t be shouting at guests or sitting awake in bed wondering, why is my HVAC so loud, ever again!