8 Common Noises Your AC Can Make

Are you a homeowner who wants to know precisely when your AC needs help? If so, then this blog post is for you! Knowing the signs of trouble that come from your mini-split AC can give you plenty of time to address issues before they become more severe. From strange banging noises and bubbling sounds, there’s a list of noises your AC communicates with you about its health.

Keep reading to learn how to spot problems with your air conditioning system before it’s too late!

Banging Noises

If your air conditioner is making a banging noise, this indicates a problem with the compressor. This component distributes refrigerant through your HVAC system. The banging sounds start when separate components hit the compressor’s exterior framing. A leak in the system or a worn-out part can cause this.

Screeching Sounds

Screeching noises indicates the motor’s fan failure or a broken engine in the compressor of the condenser system. (outdoor condenser unit).

Humming Noises

A defective contactor relay switch may cause a humming noise inside your air conditioner. This part starts the outdoor condenser unit when it receives cues from your thermostat. If you don’t take care of electrical issues in your system, though, severe damage will occur to your central air conditioning system—and that damage will be expensive to repair.

Buzzing Sounds

A buzzing sound from your outdoor condenser unit may indicate that the fan blades are loose or unbalanced. This noise can also be caused by problems such as faulty outdoor fan motors, dirty condenser coils, and loosely attached components.

Rattling Noises

If you’re hearing mysterious rattling coming from your condenser unit, it’s likely due to some loose sticks or leaves. In more severe cases, the noise may be caused by a damaged electrical contractor in your system.

Clicking Sounds

If you’re only hearing a clicking noise at the beginning or end of your cooling cycles, that’s normal. However, if you’re attending a continuous clicking sound, this could indicate that your thermostat is malfunctioning.

Hissing Noises

A hissing noise from your air conditioner indicates a leak in your house’s air ducts. It could also mean the expansion valve might malfunction, or the filter might not be compatible with your system.

Bubbling Sounds

When the air gets trapped in the pipes, you’ll hear a bubbling sound from your unit. The issue is that the refrigerant and water are not mixing correctly due to a blockage in the line.

Train Your Ears & Pay Close Attention To Your Unit

If your air conditioning system is making strange noises, it’s best to call an experienced HVAC technician to check your system. At Cosmic Comfort, we offer professional services that can help diagnose, repair, or replace all AC units, including ductless mini-split ac systems. Our knowledgeable and reliable technicians are waiting for you!

Choose Cosmic Comfort

At Cosmic Comfort, we’ll help you achieve the cool air you’ve been dreaming of. From thermostat adjustments and AC cleaning to replacing capacitors or fan motors, our capable team has the tools and experience to handle all your cooling needs.

Book with the reliable team that provides Atwater, CA, residents and commercial property owners with air conditioning services, whole-house cooling solutions, and heating repairs and replacements. Cosmic Comfort has great prices and highly qualified technicians.

Call 209-222-3161 to schedule air conditioning installation, tuneups, or repair services!

Services in Atwater, CA, with Cosmic Comfort


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