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Why is My Air Conditioner So Loud?

When it comes to your air conditioner, its sole purpose is to keep you comfortable. And even if it’s keeping you cool, when it makes loud, annoying noises, it’s not exactly doing its job. If your air conditioner is very loud, you may need air conditioner repair in Chicago, but before you pick up the phone, there are a few things you can try to quiet it down.

So that you can get back to enjoying peace and quiet in your air-conditioned home, we’ll explain why your air conditioner is so loud. That way, you can investigate ways to quiet it down, or decide that it’s time to call in professional air conditioner repair in Chicago.

Why that AC Unit is So Loud

Generally speaking, there are three parts of your AC unit that are causing all that racket. The biggest noisemakers are the compressor, the fan, and the blower. Newer air conditioning units tend to have compressors, fans and blowers that aren’t as noisy, or they have insulation that helps to muffle the sounds created by these components. However, old AC units don’t have the benefit of advanced, noise-reducing technology, so they’re often quite loud.

All that said, in some cases, the noise from your AC unit may be caused by preventable issues. Motors that aren’t properly lubricated, dirty fans, loose components, and debris in the unit can all cause an irregular amount of noise.

What Can You Do About a Loud Air Conditioner?

With older units that don’t have any problems, you’ll either have to upgrade to a quieter AC unit, or you’ll have to take measures to reduce the noise it emits. You can install fencing, use a sound blanket, or plant shrubs around your unit (if it’s outside) to reduce the sound. Just make sure that you’re allowing for proper ventilation of the unit by leaving space around the unit.

Alternatively, if you think there’s something wrong with the unit, you can inspect it for common noise-causing issues. To the extent that you’re comfortable, try to see if there are any debris clogging up the unit and remove them. If that doesn’t work, it’s best to call in a professional to take a look.

If it’s something potentially dangerous, like a refrigerant leak, it’s safer for an HVAC professional like the ones at Deljo to handle that air conditioner repair in Chicago for you.

Client Testimonials

Read the opinions of our satisfied customers.

5 stars

This was my first time as a Deljo customer, and I was very pleased. My technician, Giovanni, was very thorough and diligent. He serviced my furnace and identified a faulty sensor that was causing the unit to shut itself down. Deljo ordered the part, and Giovanni replaced it a few days later. Overall, the team at Deljo was great. The dispatcher kept me informed about Giovanni’s arrival time, and the supervisor assisted Giovanni when he was diagnosing the problem with the furnace. I highly recommend Deljo.

Paul D. 10/15/2026

5 stars

I’ve used Deljo for over 10 years now and they always do a good job. Izzy was the technician for this visit and he did an excellent job with my winter maintenance on my multiple units in the household. He also addressed an issue while cleaning the furnace blower wheel. His communication was clear and concise with what he planned to do to address the issue quickly. He was confident and I had 0 concerns or questions. Great job Izzy!

Jeff S. 10/14/2026

5 stars

Paul was great! Arrived on time and completed maintenance on my humidifier, tankless water heater, and two furnaces. All work was performed under my Gold Star maintenance program, so all maintenance charges were covered. Paul did provide a few proposals for additional services on furnace & tankless water heater, but those were emailed to me for further consideration. Paul was friendly, knowledgeable, and answered all my questions.

Jack N. 10/12/2026

5 stars

Gabe did an excellent job with our annual service visit. He arrived in the early part of our service window, was friendly and knowledgeable, and got the work done in a very reasonable amount of time. I have great confidence in Deljo, and am a long-time customer.

Ruth C. 10/9/2026

5 stars

I’ve been using Deljo for 20 years for HVAC but now venture into enlisting their plumbing services. Bashar was very courteous, efficient & informative, and I’d definitely request him again for the next plumbing job. Great experience!

Christopher R. 10/2/2026

5 stars

Working with Deljo is always a good experience, and today’s appointment with Izzy was no different. He was able to come early which actually worked better with our schedules, but called me ahead of time to make sure that was okay. He was friendly and knowledgeable when he explained the work he had done during his visit and our options for fixes. He was also able to schedule a quote appointment for us while he was still here. We would highly recommend working with Izzy and the Deljo team!

Lauren H.  9/25/2026

5 stars

Drew performed the seasonal maintenance on my AC. It needed some repairs and updates and he was able to fix everything at the same appointment. He also noticed issues with the hot water heater and we were able to get ahead of that, as well.

Emily W. 9/11/2026

5 stars

I would leave six out of five stars if I could! My technician Jorge went above and beyond on his service. There was buildup in the rental property’s toilet from the previous tenant. One maintenance person did a surface level job of cleaning but did not fully remove the obstruction. Jorge went above and beyond and came to a solution and even explained the perpetual problems older toilet models can cause. Moving forward with this insight, I can perform my own upkeep the previous tenant did not. Thank you kindly!

Kayla K.  9/15/2026

5 stars

We just had our new boiler installed by Jonathan and Carlos. First rate work! They arrived on time, removed the old boiler, installed the new unit, and explained the features. Both guys were pleasant. Bring on the cold this winter! We are ready thanks to the team from Deljo.

Edward B.  6/26/2026

5 stars

Deljo’s heating and cooling team was awesome to work with. As a first-time homeowner, I really appreciated how clearly they explained everything and answered all my questions. From the quote to the install and follow-up, the service was top-notch. Highly recommend!

Lindsey A. Chicago, IL

5 stars

Matt did an amazing job. He serviced our home and our rental property. He gave us options to help our systems run more efficiently. He also told us about Deljo’s new plumbing inspection which was very affordable. He is great!

Jordan R. Chicago, IL

5 stars

We had a problem with our Humidifier and called Deljo. Jesus came out to help and was amazing. He was extremely knowledgeable, detail oriented, and super courteous. Amazing customer experience!

Jeff C. Chicago, IL

5 stars

Jordan and Jesus were extremely helpful and knowledgeable! We would 100% work with them and have them back. They were both very professional and efficiently fixed our heating system.

Emily L. Chicago, IL

5 stars

Shout out to Ernesto for coming out and servicing our furnace and air con. Deljo provides a great service and glad to trust them with our HVAC for our small business.

Lauren H. Chicago, IL

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