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Serving the Greater Los Angeles Area


Serving the Greater Los Angeles Area


JMS Air Conditioning and Heating Blog

Is Your AC Haunted? 5 Sounds It Shouldn’t Make

Scared woman covering mouth with hands

Unusual air conditioner sounds are never a good sign. They can make you cringe no matter what time of the year that they happen. However, during “spooky season,” unusual AC sounds can be even more terrifying.

Unusual AC sounds that give you a fright are an indication that you need to schedule air conditioning repair in Los Angeles, and fast! Allowing unusual sounds to continue on will only make matters worse. Keep reading to learn more about some of the scariest sounds that can come from your air conditioner. 


If you hear a loud banging sound there’s a good chance that it’s coming from your compressor. We often see connector rods or piston pins that come loose and bang around the inside of the compressor. This is an easy enough problem to fix unless you allow the banging to continue long enough that your entire compressor is damaged and needs to be replaced. Then a repair that might have been hundreds of dollars turns into a repair that costs thousands of dollars–a truly terrifying scenario you don’t want to experience!

Clanking or Clanging

If you hear a sound that is like clanking or clanging, there’s a good chance that you have fan blades either off-balance or bent. These fan blades are hitting against other metal components as they rotate around, resulting in a clanging or clanking sound. Just like banging sounds that can come from your compressor, you want to address the issue sooner rather than later. 

Ideally, you want to turn your air conditioner off completely so that the clanging sounds don’t have an opportunity to do any more damage than they already have. When you address the problem early, there’s a chance that we can simply re-secure your fan blades and get them back into their proper position. However, if the noise continues on, the damage will only worsen and lead to more expensive repair needs.


This sound can happen from a variety of sources inside your air conditioner. If you hear buzzing, our team will have to troubleshoot and figure out where the sound is coming from. In some cases, the isolation feet that help to balance your air conditioner are uneven, resulting in a buzzing sound during operation. 

Other times the amperage inside of your compressor is off, resulting in a buzzing sound. But it’s also possible that you hear a buzz when there’s an electrical issue inside the air conditioner’s capacitor. Rest assured that no matter what the problem is, our team can troubleshoot and come up with a solution.


Squealing is a particularly alarming sound because it can indicate that there is too much pressure building up inside the air conditioner. As the air pressure builds up, the air escaping can make a squealing sound. You definitely want to get this checked out before the additional pressure damages your air conditioner beyond the point of repair. Our team can figure out why the pressure is off and fix it, even preventing it from happening again in the future.

Bubbling or Hissing

If you have a refrigerant leak inside of your air conditioner, it will either make a hissing or a bubbling sound. The bubbling sound happens when the refrigerant leak occurs in an area of the refrigerant line where the refrigerant is in its liquid form.

Alternately, you will hear a hissing sound if there is a leak in the line where refrigerant is in its gas form. The high-pressure gas will hiss as it escapes the line. Either sound is an issue that needs to be addressed because refrigerant can be a very dangerous chemical to come into contact with.

JMS Air Conditioning and Heating has your back. Call us today to schedule an appointment for an air conditioning repair in Los Angeles, CA!

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