Downtown Air and Heat Blog

Why Is My AC Unit Making a Buzzing Noise When Off?

April 18th, 2024

When the sweltering heat of summer hits, your air conditioner becomes your best friend, offering a cool refuge from the relentless warmth. But what happens when your source of comfort starts making mysterious noises, even when it’s turned off? This is where Downtown Air and Heat can step in—your trusted HVAC company specializing in air conditioning services.

With a reputation for expertly diagnosing and resolving AC unit issues, Downtown Air and Heat understands the importance of addressing these noises promptly to prevent further damage and ensure your air conditioner’s optimal performance.

The Mysterious Buzzing: Unveiling the Causes

An air conditioner making a humming noise when off is not just an annoyance—it’s a call for attention. There are a few reasons for this:

  • Electrical Issues: One of the most common reasons for a buzzing sound is an electrical problem. This could be due to a faulty relay or contactor in the outdoor unit. Even when the AC is off, electricity flows to the unit, and a malfunction can cause a continuous buzzing noise.
  • Vibrations: Sometimes, the noise may be due to parts of the AC unit or ductwork expanding and contracting, causing vibrations that result in buzzing sounds.
  • Refrigerant Leaks: A hissing or bubbling noise may indicate a refrigerant leak. While this sound may not be a buzz per se, it’s often lumped together with other unexplained AC noises.
  • Debris: Debris trapped in the indoor or outdoor unit can also cause noises. Twigs, leaves, or even small animals can create a buzzing sound if they interfere with the fan blades or other moving parts.

Ignoring the Buzz Can Impact the Overall Performance of Air Conditioners

The buzzing noise from AC units is not just a minor inconvenience—it can be a harbinger of more serious electrical issues that can quickly impact the overall performance if not addressed.

System Failures

The buzzing noise could be indicative of an electrical problem within your AC unit. Equipment such as capacitors, contactors, or wiring, may be failing. If this type of malfunction is not rectified, it can lead to a total system shutdown. In extreme cases, faulty wiring or overheated components can even pose a fire hazard, putting your property and safety at risk.

Increased Energy Bills

An air conditioner that operates with a fault will often consume more power. The system compensates for the inefficiency by running longer cycles or working harder to maintain the desired temperature. This inefficiency translates to higher energy consumption, which will be reflected in your utility bills. Over time, this not only costs you more money but also puts undue strain on the environment due to increased energy usage.

Costly Repairs

A buzzing noise is often a sign that something within the AC unit is not working as it should. When such warning signs are ignored, what might have been a simple fix can evolve into a major repair. Components that might have been saved can become irreparably damaged, leading to the need for more extensive and expensive repairs or even a complete replacement of the unit.

Component Wear and Tear

The strain of operating with a fault can cause additional wear and tear on other components of the AC system. For example, if the buzzing is due to a failing fan motor, continuing to run the unit can cause the motor to burn out completely. This not only necessitates the replacement of the fan motor but can also affect other parts of the system that rely on the fan’s functionality.

Reduced Lifespan

The overall lifespan of your air conditioning unit can be significantly reduced if problems are not addressed promptly. Continuous operation under stress can lead to early degradation of the system’s components, meaning you’ll have to replace the entire unit sooner than you would have with proper maintenance and timely repairs.

Health Risks

In some cases, the cause of the buzzing could be related to the refrigerant circuit of the AC unit. A leak or pressure issue could not only cause noise but also lead to the release of refrigerant gasses, which can be harmful to health if inhaled over time.

Comfort and Peace of Mind

Lastly, an AC unit that is not functioning correctly can affect your comfort within your home. The stress of knowing there is an unresolved issue, coupled with the potential for a sudden breakdown, can also take a toll on your peace of mind.

The risks of ignoring a buzzing noise from your AC unit are numerous and can have far-reaching consequences. It’s always best to address such issues promptly to ensure the longevity of your system, your financial well-being, and your safety.

Photo of people turning on AC with the remote control

Silencing the Buzz: Common Solutions

To fix the buzzing noise issue, consider the following solutions:

  • Electrical Inspection: Have a professional inspect the electrical components of your AC unit. Replacing a faulty relay or contactor can often resolve the issue.
  • Tightening Components: Loose parts can cause vibrations. Tightening screws and securing components may eliminate the noise.
  • Sealing Refrigerant Leaks: If a refrigerant leak is the culprit, a qualified technician will need to seal the leak and recharge the system with refrigerant.
  • Clearing Debris: Regularly cleaning your AC unit and removing any debris can prevent buzzing noises caused by obstructions.

Downtown Air and Heat: Your Noise-Canceling Experts

At Downtown Air and Heat, we don’t just silence the noise—we diagnose the root cause to provide a lasting solution. Our team of skilled technicians is equipped to handle all aspects of AC noise troubleshooting. We offer:

  • Thorough Inspections: We meticulously inspect your AC unit to identify the source of the noise.
  • Expert Repairs: Our technicians are trained to repair any issues, from electrical faults to refrigerant leaks.
  • Preventative Maintenance: We provide regular maintenance services to keep your AC running smoothly and noise-free.

Preventative Measures: Keeping the Quiet

To prevent buzzing noises and maintain the tranquility of your home, regular AC maintenance is key. Here are some tips:

  • Regular Cleaning: Keep your AC unit clean and clear of debris to prevent obstructions and noise.
  • Seasonal Servicing: Schedule professional maintenance at least once a year to ensure all parts are in good working order.
  • Prompt Repairs: Address any issues as soon as they arise to prevent them from escalating.

A buzzing air conditioner can be the first indication of underlying issues that shouldn’t be ignored. With Downtown Air and Heat, you have a partner in ensuring your AC’s longevity and efficiency. Our expertise in diagnosing and resolving AC unit issues, coupled with our commitment to customer satisfaction, makes us the go-to HVAC company for all your air conditioning needs. Don’t let a buzzing noise disrupt your comfort. Contact Downtown Air and Heat today and enjoy the sound of silence once again.

Continue Reading

Why Does My AC Sound Like Water Running? Unveiling the Mystery Behind the Noisy Air Conditioning Unit

April 18th, 2024

Air conditioning systems serve an important function in your home. They keep you cool and comfortable, even on the hottest days. Your AC is perhaps the most vital appliance you own, and it’s imperative to take care of it. Air conditioners make ambient noise that tends to blend into the background, which is why you may not notice it on most days. When you hear a strange noise, it’s certainly a cause for concern.

If you’re hearing sounds like running water, hissing, or other unusual noises, it’s time to get your air conditioner checked out. Downtown Air and Heat helps keep the Greater Orlando Area cool by offering expert AC repair. In this blog post, we explore the reasons why your AC unit may be making water noise and how we can resolve your air conditioner problems.

Unusual Water Sounds Your Air Conditioner May Make

A running water sound and other water-related noises aren’t normal for any AC system. Here are the common running water noises you may hear when your AC has an issue.

Dripping Noise

A dripping noise may not be a major issue immediately, but if the drip is constant over a period of time, you likely need AC maintenance. Your air conditioner takes in warm air, which is collected on the evaporator coil, where it is exposed to refrigerant to cool the air it blows out. During this process, it creates condensation, then drips into the drain pan or drip pan beneath.

While the water should fall into your drip pan, if you hear splashing, it may be due to the water dripping into a full pan. In the process of removing humidity from the air, that pan can fill up with water if the condensate drain line becomes clogged.

It will only be a matter of time before these water sounds lead to a breakdown of your AC system. Often, it will trigger the float switch, which is designed to shut down your AC before the pan can overflow and cause further damage. A little condensation is usually nothing to worry about, but if you hear that persistent drip, it’s time for AC service.

Running Water Sounds

If you hear a sound like running water coming from your AC unit, then you should not hesitate to make a service call. An AC unit creates condensation during the cooling process, but it does not use water to operate. This sound is a likely indication that your evaporator coil has frozen over and is leaking water all over.

The causes could range from something simple to a much larger issue.

Hissing AC Sound

If you hear a continuous hissing sound, you may have refrigerant leaking. Compressor problems, such as a malfunctioning compressor or an internal valve leak with the compressor valve, can also create this strange hissing sound.

Gurgling or Bubbling

When this essential appliance makes gurgling or bubbling sounds, it could be the pressurized gaseous refrigerant flowing through the copper refrigerant lines. If there is a leak or something is stuck in the line, you will hear this frustrating sound.

Photo of air conditioner

Common Causes of Water Dripping

Filthy Air Filter

An air filter that is caked with dust, dirt, and pet hair will restrict the airflow to your unit. When this happens, the evaporator coil may get to temperatures below freezing. It can then freeze the condensate that has built up on the coil. Additionally, the coil itself may be dirty and in need of cleaning.

Low Refrigerant

The chilled refrigerant liquid circulates and draws heat out of the air in your home to bring your indoor air temperature to a comfortable level. When you are running low on refrigerant or your refrigerant leaks, ice can form.

Broken Thermostat

If your thermostat has gone haywire, it may cause your AC to run constantly, even when it hits your set temperature. This can also cause the coil to freeze and make running water sounds.
Ultimately, if your AC sounds like running water, there are numerous causes that an HVAC professional can repair and get your unit back on track.

How to Deal with AC Water Noises

Whether you hear the sound of excess water, drips, hisses, splashes, or bangs, you should arrange for immediate AC service. Even if your AC is still running, it will only be a matter of time before it breaks down.

The best way to keep issues like this from arising is to keep up with regular AC maintenance. When you have a professional HVAC company come out each year, they can perform essential cleaning and inspection services. Your HVAC technician can spot any minor issues before they become major problems. In Central Florida, it’s always a smart move to keep your AC running smoothly to prevent any downtime that will cause you to suffer from sweltering temperatures indoors.

You can count on Downtown Air and Heat to help keep your Orlando area home cool and comfortable at an affordable price. With same-day service, you won’t have to wait long to get your AC back up and running. Contact us now to get an expert HVAC technician out to your home today!

Continue Reading

What Should I Set My Thermostat to When I’m on Vacation?

November 9th, 2023

Changing your thermostat settings before leaving the house is a simple and effective way to save energy, reduce your utility bills, and enjoy an eco-friendly living environment without sacrificing having a comfortable home. Doing so will have several important benefits.

Continue Reading

Should You Install Your New Air Conditioner on the Roof or Ground?

February 28th, 2017

If you live in Orlando, you’ve probably noticed air conditioners on the roof and on the ground. When you are faced with the dilemma on which location will be better for your home, you should first identify the differences between the options. Here is a number of aesthetic and practical factors to consider.

Continue Reading

Improve Your Heater’s Efficiency Before Winter

December 12th, 2016

Winter is still a few days away, and here in Casselberry, FL, it’s not exactly going to be a frozen wasteland. Even so, you’re going to be using your heater much more often than normal, which means higher bills and increased wear on the system. Some of that is inevitable, but just because you pay more to keep your home comfortable in the winter doesn’t mean you need to pay more than you should. You can improve your heating system’s efficiency before winter hits with the judicious installation of an upgrade to your existing system. We’ve provided a brief list of options below.

Continue Reading

Time for a New Thermostat?

December 5th, 2016

The holidays are here, and in addition to gifts for your friends and family members, you might want to think about giving your Orlando, FL home a present or two as well. Consider, for example, the current state of your thermostat. Thermostats are designed to last for decades without trouble, and if yours is more than ten years old, you’ve likely gotten a lot of use out of it. But there’re a drawback to that longevity: older thermostats can’t take advantage of some of the exciting developments in the field of the last few years. You might consider a replacement thermostat as a present to yourself and your family.

Continue Reading

How to Notice a Duct Breach

November 28th, 2016

Most homes in the Maitland Park, FL area use forced-air furnaces to heat their homes, which is an effective means of keeping warm during our brief and mild winters. But the same ducts that distribute air from your heater do so for your air conditioner, and while they’re built to last, that year ’round effort can eventually lead to problems. Breaches, in particular, can be real trouble if you let them linger.

Continue Reading

Watch for These Heating and Cooling Issues This Thanksgiving

November 21st, 2016

Thanksgiving is upon us, and just because the weather in Winter Park, FL stays much warmer than it does in the rest of the country, that doesn’t mean you won’t have concerns with your HVAC system if you’re going to be entertaining guests in your home this year. Proper heating and cooling is essential to a comfortable home, and you want your guests to be as comfortable as possible when they come to visit.

A little foresight and some judicious use of your thermostat can eliminate potential issues and ensure that everyone feels at their best. It may mean operating your heater or your air conditioning, depending on the weather on Thursday (or later in the year, if you’re hosting anyone in December).

Continue Reading

Problems with Older Furnaces

November 14th, 2016

Furnaces are designed to last a long time, and with our mild winters here in Casselberry, FL, they can last even longer. But that doesn’t mean they will go on forever, and as they age, specific problems are bound to crop up. Once the warranty on your heater expires, you need to take careful note of any problems that arise. Some of them can be dealt with by timely repair sessions, but eventually one or more of them will likely require you to purchase a new heater. These problems can include, but are not limited to, the following:

Continue Reading

Schedule a Heater Servicing Session Now!

November 3rd, 2016

Air conditioning season lasts a long time here in Orlando, FL, which is why we’re such a thriving tourist spot. Long summers and mild winters have a way of putting people at ease, and local residents justifiably spend more time concerned about their air conditioning systems than their heating systems. But with fall well underway, temperatures are going to drop, and while an operating heater isn’t as pressing a concern as an operating air conditioner, you don’t want your furnace to run into trouble on the coldest nights of the year.

Continue Reading