AC noises: What They Might Mean and How to Fix Them

Air conditioning systems are noiseless than ever, thanks to advancements in technology. Therefore, it is alarming when you hear some strange noises that come from your AC. These sounds shouldn’t be ignored, whether they originate from the condenser or the AC unit itself. Here are a few commonly heard AC noises and what they signify, and how one can fix them. This will help you be ready for any issues during the AC season.

Some common AC noises and how to fix them

  • Screeching sounds

A broken fan motor in the outside condenser unit is the most frequent cause of a screaming sound coming from an air conditioner. Your home’s central air conditioning system has a fan that’s intended to remove heat from the refrigerant. 

The fan motor may be malfunction if your AC is generating a shrill noise. A damaged motor in the compressor of the condenser system may possibly be the cause of this noise. A broken blower fan motor inside your home might potentially produce a screeching or squealing sound. 

Besides, the blower fan is designed to draw warm air from all of your home’s rooms. In addition, worn bearings in your fan motor may cause a screeching sound near your home’s HVAC system. Additionally, this noise could potentially be the result of a damaged fan belt. Immediately turn off your air conditioner and contact a qualified HVAC contractor if you hear loud AC noises.

  • Buzzing Sounds 

Never overlook your central air conditioning system’s buzzing noise. This noise could indicate that the fan blades in your outdoor condenser unit are imbalanced or loose. Additionally, problems like a broken exterior fan motor, filthy condenser coils, and loose parts may be to blame for this noise. 

An obstruction close to the copper wires that are linked to your AC may be the cause of a buzzing sound. A refrigerant leak is the most serious issue that could be the source of this problem. Do not disregard a buzzing noise, please. By engaging a qualified expert to do an air conditioner tune-up, you can be proactive and get ready for the summer.

  • Banging Sound

Another common disturbing AC noise is the banging sound. The compressor may malfunction if the air conditioner is generating a banging noise. This item has come up with a design that helps to transfer refrigerant to various HVAC system components to eliminate extra heat from your house. 

It is usual for parts to become loose inside the compressor as your central air conditioning system nears the middle or end of its lifespan. When this happens, your air conditioning system may start to rattle when you turn it on. Detachable parts striking the compressors outside framing are the source of this noise. 

It is necessary for you to spend money on a new energy-efficient air conditioner. It is because the compressor is not designed to be easily dismantled. Call a professional HVAC technician in your neighborhood if the air conditioner is making a banging noise for help with this issue.

  • Humming sounds

Someone humming a song can be lovely to hear but your AC making a humming sound is surely not the sound you want to hear. A contactor relay switch that is broken may cause your air conditioner to start making humming noises. If it receives a signal from your thermostat, this part helps to turn on the outdoor condenser unit. 

Unfortunately, until a qualified expert examines the problem, you won’t be able to turn on your AC. Do not disregard your system’s electrical problems. The central air conditioning system will suffer serious harm; as a result, necessitating costly repairs.

  • Whistling sound

Who doesn’t love a nice whistling sound? The sound of the wind whistling! Sounds wonderful, isn’t it? But when your AC makes such whistling sounds, it’s quite disturbing. There are mainly two reasons why the AC makes a whistling sound, i.e., either the AC duct has a leak or there’s an obstruction in the flow of the air. 

If the central air conditioner has a leaky duct, it may produce whistling-like noises. In that case, you need to properly seal the ducting as a fix. The leaky duct not only makes noise, but also wastes energy that raises your expenses. 

High pressure on the blower engine, compelled by the dearth of air, will result in whistling noises (high-pitched) if an obstruction restricts the airflow of the air conditioner. Because the air filters are clogged, the blower motor must work harder to pump air into the appliance. The air leaking through the cracks will produce whistling noises. Regular air filter cleaning will stop this problem from happening again.

  • Cracking Sound

Getting to hear a cracking sound from AC is not a good sign. The evaporator coils in the HVAC system are able to freeze when you set the temperature too low, if you keep the fins unclean or when the moisture is unable to drain properly. These coils release ice, and as it does so, a loud cracking sound resounds throughout your body. 

Take apart your AC to reach the fins as well as begin troubleshooting. Clean the fins carefully with dish soap before drying. If you haven’t successfully disassembled an AC previously, don’t do it; instead, call a technician.

Some of the AC noises that you might hear are these. After reading this article, you’ll understand what causes these noises and how to stop them. You can either hire an HVAC expert for assistance or attempt to fix them yourself. If you are looking for an expert, you can contact Plumbing Concepts Inc. They have the best plumbing and service and repair facilities. With 35 years in this field, they have managed to satisfy many customers and give them the best services.


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Disclaimer: The information provided on this blog is curated using online data and sources. We encourage readers to check for accuracy and always consult with a licensed professional before making any decisions. For the latest information and expert plumbing services, please call our office at (951) 520-8590.

Plumbing Concepts, Inc. © 2024. All rights reserved.

Plumbing Concepts, Inc. © 2024. All rights reserved.

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