Why is My Air Conditioner Making a Loud Buzzing Noise?

air conditioner making loud buzzing sound

The soft hum of a functioning AC unit is always reassuring, especially in the sweltering heat of a 95-degree summer day. But what does it mean when that delightful sound turns into a loud buzz? When in doubt, it’s a good idea to contact a licensed heating and cooling professional to give your unit a checkup. There are a few different scenarios that could be responsible for your noisy AC, and each should be addressed as quickly as possible.

It Could Be a Refrigerant Leak Coming from Your AC

One of the most telltale signs of an improperly functioning AC unit is that it’s frozen. You may notice that your house isn’t cooling efficiently, but the AC unit itself feels cold to the touch and has a visible casing of ice over the coils.

In this case, your air conditioner unit may have a refrigerant leak that is causing condensation to freeze. This is a common issue that may cause buzzing sounds from your AC. It is a definite sign that your unit is not working properly or efficiently and should be attended to promptly.

Your Air Conditioner Unit Might Have Worn or Missing Isolation Feet

noisy air conditioner unit

Your air conditioner compressor is situated on the base of your unit and vibrates constantly when in use. It is mounted on small, rubber “isolation feet.” Much like a washing machine that becomes unbalanced, your AC compressor will make a loud buzzing noise if the isolation feet have become damaged or missing over time.

Check for Loose, Missing, or Broken Parts in Your AC

Your AC unit is comprised of a multitude of moving parts which must all work together to keep it running efficiently – and quietly. A loud buzzing sound may signal that something has come loose over time, is broken, or is missing. Identifying a potential missing or broken part can be tricky and dangerous, so your best bet is to have a licensed professional take a look inside.

It Could Be an AC Compressor Malfunction or Incorrect Amperage

The compressor in your unit is responsible for pressurizing and cooling refrigerant and is one of the most vital components of your air conditioner. A buzzing sound may indicate that the voltage running through your outdoor unit is not set at the correct amperage or that your compressor itself is not functioning properly. If your AC compressor fails, the unit will not be able to cool your home. Making sure your compressor is working correctly is essential to both the health of your unit and your comfort.

At Herrmann Services, our expert technicians are highly trained, knowledgeable, and able to service all brands of air conditioners and furnaces. We can assure you our professionals know their stuff and will have your noisy air conditioner unit buzz-free in no time!

If you need help with your air conditioner, call Herrmann Services at (513) 737-8423 or contact us online. We are always here to assist you with any of your heating or cooling needs.