Common Reasons Why Your AC Making Noise

Since we rely on our cooling systems to get through the hot summer days, it can be frustrating and troubling to hear exceptionally loud noises from your air conditioner. You should never ignore the unfamiliar noises coming out from your AC, as they can allow minor fixes to become costlier repairs.

Generally, we don’t tend to think about the maintenance and tune-up of our air conditioning units unless they break out or make loud noises. If your AC makes weird noises, it can signify that your system needs to be repaired or replaced. The sooner you determine the underlying problems, the more expensive fixes you can avoid.

If your AC has any potential problem, it will make several different noises. For example, you may hear a clanking, popping, or buzzing sound. These different sounds signify various AC issues. Stay calm if your HVAC system is so loud. This write-up will share 4 common noises you will hear from your AC. We will also discuss the causes of these mysterious sounds and what you need to do to fix them.

AC making noise

Various Types of AC Noises


  1.     Buzzing Noise

You may hear a buzzing noise from your AC system due to the following reasons:

  •         Uncleaned condenser coils
  •         Dirt and debris in the outdoor or indoor unit
  •         Loose parts
  •         Unbalanced fan blades
  •         Damaged air filters

Depending on the cause of the issue, you can prevent your AC from making a buzzing sound in the future. A routine check-up and maintenance can help resolve this issue.


  1.     Clicking Noise

It is usual for a cooling system to make a clicking sound at the start-up and shut down the cooling cycles. But if you hear a constant clicking sound, it may signify a potential problem. A loud and constant clicky noise coming from your AC could be a reason of:

  •         Loose AC fan
  •         Faulty electrical signals
  •         Malfunction thermostat
  •         Capacitor discharge

To resolve this clicky sound, you need to clean your AC fans. But suppose your system is making noise due to a thermostat malfunction, faulty electrical signals, or a capacitor losing its charge. In that case, you need a professional HVAC contractor like Diamond Air Design to fix the problem.


  1.     Clanking Noise

Your air conditioning unit may also make a clanking noise due to losing connections or broken components. A clanking AC sound could be a sign of:

  •         The outdoor fan and indoor blower are hitting each other
  •         Loose compressor
  •         Failed components

You can fix a clanking noise by repairing the outdoor fan and indoor blower to set the system back in balance.


  1.     Grinding Noise

    Dirt and debris on the AC fans can cause grinding noises coming out from the system. It also signifies that small rocks have damaged the system’s mechanical components. Call a professional HVAC contractor to fix this problem before breaking down the entire system.

Hearing loud and mysterious noises from your air conditioning unit can indicate a potential underlying problem. Call the pros of Diamond Air Design to diagnose and repair your HVAC system today.

Let’s Get Started. Ready to speak with an expert?

Richard Orlando
Richard Orlando
December 29, 2022
Professional all the way! Hunter is the man and I would recommend this company to anyone.
S Reyes
S Reyes
December 15, 2022
Great family owned business. They show up when they say they will and do great work!
Michael C
Michael C
September 30, 2022
I engaged Diamond Air Design to replace two heat pump systems at my residence. From my initial contact to the completion of the project, I received nothing but the highest level of professional service. Brandon and his installation team did meticulous work, completing the project on time and exactly as promised. Diamond Air is a family-owned business with a sterling reputation. From my experience I understand exactly how they attained and why they deserve that reputation. Highly recommended.
Dennis Wilson
Dennis Wilson
September 19, 2022
Excellent installation of thermostat and HVAC unit and ‘fine-tuning’ the unit. Technician very courteous and informative.
Myda Young
Myda Young
September 7, 2022
This is one of the 3 companies I had out to my house. I’m very happy Diamond Air was one I contacted. They offered exactly what I needed, did not upsell me and were right on target on what would solve my issue. Preston, my Service Tech, was ready to answer my questions, was super knowledgeable, professional and just a charm beaming with honesty, kindness and all I could pray for in a service tech. You will not be disappointed putting your A/C equipment in their hands! Thank you Diamond Air Team! You have my business.
DarinJon Christopher
DarinJon Christopher
September 6, 2022
Just another Professional service from Diamond Air Design. We started using this company when Brandon was just starting his business and learning from his dad. His Mom was in the office and we loved it was family assisting other families whom needed help. Preston the young gentleman who came today was very professional and a service tech who explained everything as I like to know what's going on with my equipment.Thank you Sir and I hope you continue to make your career with Brandon's team as you continue to learn. Thanks again Diamond
Ronald Specker
Ronald Specker
August 11, 2022
I had an American Standard Platinum HVAC System installed. Brandon, Stewart, and Preston did the install work. They were scheduled to start at 8:00 am. Stewart arrived at 7:45 am and immediately went to work. Brandon and Preston arrived at 8:00 am with the new HVAC System. I tried to offer them drinks and something to eat but they were more concerned with completing the job. The crew was absolutely fantastic. They completed the install work in about 7 hours. They never stopped working until the job was completely finished. They did an outstanding job installing the new system. The company even filed my warranty paper work for me. I had to do nothing but sit back at let them do all the work, from the install, warranty registration, and setting up the county inspection. They even provided financing for 0% interest rate for 60 months. I would ABSOLUTELY recommend Daimond Air Design for HVAC System Replacement!!!

NEED FINANCING? YOU HAVE SEVERAL OPTIONS!

Related Articles

Best Thermostat Setting for Summer and Winter

It’s natural to think about the best thermostat setting when you experience some of the coldest or warmest temperatures outside. Changing your thermostat temperature consistently can make your home uncomfortable. In addition, if your thermostat is not set to the right...

What is a Dual Fuel System in HVAC Units?

The winter and summer seasons can be starkly different in Florida. Freezing winter days offer an excellent challenge for HVAC systems to keep your places warm, but it's not always easy to use the same system on hotter days to keep your homes cool. Here dual fuel...

What Are SEER Ratings for HVAC Systems?

If you're considering upgrading or replacing your old HVAC system, you might be concerned about the logistics of replacing or repairing your unit. These worries are valid because every homeowner wishes to get the finest-quality unit to enjoy maximum energy savings and...