AC Sound Issues: What You Should Know About Necessary Repairs

10 November 2019
 Categories: Construction & Contractors, Blog


When it comes to determining when your air conditioner needs repair, it's important that you be aware of what the noises your system makes can mean. It's easy to dismiss unusual sounds as nothing to worry about, especially if those sounds are not excessively loud. However, some noises, while they may not seem harmful, can be indications of problems that necessitate AC repairs. Here are some sounds you need to be attentive to from your air conditioner.


Although it can be hard to hear hissing sounds coming from your air conditioner over any other noises, when you do hear them, you need to be attentive to what hissing can mean. Any kind of hissing is usually an indication of some type of air escaping from your AC system, but the question is what type.

If you're hearing the hissing from inside your house, it's likely an indication of air escaping from the air ducts in your home. You'll have to locate the source of the leak by tracing your air ducts and finding the hole. Then, you can patch the hole to eliminate the hissing and the air loss. This may even improve the efficiency of your HVAC system.

When the hissing noise is centered outside, that often means that you have a leak in the air conditioning condenser itself. If that's the case, the unit is most likely leaking refrigerant. In a case like this, you'll need to call an AC repair technician to address this. They can test the pressure in the system to confirm the leak, locate and patch the leak source, and then recharge the system.


The sound of banging from your air conditioning unit is another cause for concern. Banging is usually a sign of something inside the condenser hitting another component inside. If the banging is coming from outside, that means you need to call an AC repair technician for an inspection and repair.

If, however, the noise is coming from inside your home, that's probably a sign that your air ducts are shifting under the pressure of the airflow. You should check all of the mounting brackets and tighten them securely to stop the noise.


When your air conditioning unit starts screeching, that's usually a result of lubrication problems. The noise is caused by the lack of lubrication in the system. As soon as you start hearing sounds like these, you need to call for an AC repair technician right away. He or she can help you solve the problem.

Reach out to a company such as Nathan's Heating & Air Conditioning, Inc. to learn more.