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Why Is My AC So Loud?

August 16, 2023 | Blog

Your air conditioner is working as normal, then one day it starts making loud sounds. It’s rattling or squealing and you’re not sure what the problem is.

Not only is a loud AC annoying and distracting, but it’s a good idea to find the source of the problem. At Baldwin Heating & Cooling, we’re here to provide you with a few reasons as to why your air conditioner is so loud.

Common Sounds From An Air Conditioner Unit

While it’s normal for your AC system to make a noise when it first turns on, frequent, constant, or loud sounds are usually a sign of an issue with your unit. Here are a few common loud sounds that may come from your indoor or outdoor cooling unit and their causes and solutions.

Loud Rattle From Cooling Unit

If a sudden loud rattling sound occurs from your unit, it may be one of three problems:

  • Loose parts
  • Motor damage
  • Debris caught in AC

Loose parts and motor damage will likely need professional AC repair. Sometimes a piece of debris like twigs can get stuck in the outdoor air conditioner’s compressor fan. To resolve the problem, turn off the AC and remove any debris that is preventing the fan from working properly.

Squealing From Your AC

If you hear squealing from your cooling unit, this could mean the indoor AC’s belt is worn out or misaligned. The squealing sound can vary as the fluctuating humidity and temperature levels can cause the belt to expand and contract.

To fix the problem, schedule system repair with our team to replace the belts and motor bearings. Having regular AC maintenance from a professional in the Daphne area can help keep these parts in optimal condition.

Hissing Sounds From Ductwork

It’s reasonable to hear a quiet rush of air from your air conditioner’s ductwork. If you hear hissing or whistling though, this could mean that the ducts are leaking and that the system is improperly sealed. Air leaks must be addressed immediately as they decrease your system’s efficiency and drive up your energy bills. It’s not enough to patch your ducts, but to be sure that your AC repair includes fixing and properly installing your ductwork.

Buzzing Sounds From Your Air Conditioner

Buzzing sounds may indicate a few possible issues, including:

  • Refrigerant leak
  • Condenser fan not working
  • Cooling unit wearing down

A refrigerant leak or broken condenser fan can cause a frozen AC system. When ice forms on your system’s evaporator coils, buzzing noises can often be heard.

Other times, a frozen AC means that your AC unit is wearing down altogether. This is caused by use over time – like with any other appliance. In this instance, there really isn’t anything you can do other than to start looking for a new air conditioner installation as soon as you can.

Professional AC Repair From Baldwin Heating And Cooling

When your cooling unit makes a loud sound, it isn’t something to ignore. It’s important to check and find the source of the noise so you can fix the problem. A loud AC could result in more costly consequences and damages to your air conditioner. Regular HVAC maintenance from our professional technicians can also help some of these issues from occurring before they even happen!

If you need help diagnosing the source of any loud noises coming from your cooling system, professional AC repair at Baldwin Heating & Cooling is here for you! We can help you get a quiet AC again. Contact us today!

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