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These Sounds Spell Disaster for Your Air Conditioner


Some air conditioner sounds are completely normal as a part of every day operation. But other AC sounds can mean major problems if you don’t get them addressed quickly. The question is, which sounds are OK to hear and which sounds are bad?

When you understand how your air conditioner operates, and know what to listen for, you can identify problems early on before they lead to air conditioner damage. If you hear any of the sounds below, give our team a call for AC repair in Lancaster, TX. Keep reading to learn more about the sounds that mean it’s time to call in the experts. 


The only time you should hear clicking is when your air conditioner turns on and off before and after a cooling cycle. Hearing clicking at any other time is a red flag. It may mean that your thermostat is malfunctioning and needs to be recalibrated or replaced. 

Your thermostat is important because it tells your air conditioner when to turn on and off. If it is malfunctioning, your air conditioner may not be cooling like it should. You may notice that your home is warmer than usual, or that cooling cycles are shorter and more sporadic.

Replacing your thermostat may seem like an easy task, but there’s a lot that goes into connecting your thermostat the correct way. Give us a call instead of attempting a DIY repair or replacement. We can make sure it is calibrated correctly and even give you tips on using your thermostat to maximize your air conditioner’s energy efficiency. 

Hissing or Bubbling

If you hear a hissing or a bubbling sound, it can indicate that your AC has a refrigerant leak. As refrigerant cycles through your air conditioner to provide cooling, and alternates between being in a gas form and a liquid form. If the line of your AC leaks where the refrigerant is a gas, you will hear a hissing sound. 

If the refrigerant is making a bubbling sound, that means it is in its liquid form at the source of the leak. If your refrigerant is leaking out, your air conditioner cannot provide adequate cooling for your home. Plus, refrigerant can be very dangerous for your health if you breathe it in, and touching it can leave burns on your skin.


A banging sound is usually a sign that something is wrong with your compressor. While it is intended to be a single part of your AC, there are many components inside of it that help at work to cool your home. It is normal for these parts to come loose and rattle as the system ages, although any sounds to do need to be addressed and fixed. 

A banging sound usually means that something larger is loose and knocking around. If you get the problem looked at sooner, we may be able to get inside the compressor and fix it. But waiting can mean and that you need to replace your entire compressor, and maybe even your entire air conditioner.

Contact Republic Heating & Air Conditioning, Inc, today to schedule an appointment with our professionals. Revolutionizing the Customer Experience.

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