5 Easy Solutions to A Whistling Air Duct

Whistling isn’t always an unpleasant sound. When it’s a small child who just learned how to do it, or if a loved one is whistling their favorite song (mostly in tune, at least), whistling may be something you altogether don’t mind.

Until it’s your air vents making those high-pitched noises, that is.

Typically, an air vent will make a whistling sound when it is starved of proper air flow, resulting in an increase in both air pressure and velocity.

So, to end the whistling sound, you essentially have to open the airways back up. Here are a few ways you might accomplish that:

  1. Change Your Air Filter

    Dirty air filters won’t just degrade the level of air quality in your home — they’ll block airflow and make it harder for your vents to “breathe.” An easy fix may simply be to buy a new air filter.

  2. Clean Your Return Vent

    The return vent is the vent that sucks air from your home and into the HVAC system itself. But dust, debris, and other allergens can block the flow of air in this area, so it may behoove you to check the vent and simply dust it out.

  3. Open Your Supply Vent

    The return vent is the other end of the equation: it’s the one that blows conditioned air back into your home. But many people, particularly if their thermostat is set low, might shut these vents to mitigate cold air flow. But this can hinder your system’s overall efficiency and create whistling, so you’ll want to open these vents back up.

  4. Check the Position of Your Dampers

    Dampers are metal valves that provide you more control over the A/C in your home, as you can shut them off to prevent airflow to a certain area. However, this presents a similar problem to that of your supply vent — when they’re shut, they can cause whistling. Consider keeping them open to see if they end the noise.

  5. Clean Your Ducts

    Dust, debris, and even small toys or other objects might sneak their way into the ducts of your supply vent side. Try cleaning out the ducts or removing any objects blocking the airflow in that area before you grab your earplugs.

While these five solutions are easy DIY fixes, there could also be some causes of the whistling that you need to turn to a professional to fix. An oversized system, for instance, or an issue with your blower wheel might merit another phone call.

So why not contact Bold City Heating and Air? Not only are we your trusted heating and air conditioning experts in repair, maintenance, and installation, but we’re dedicated to helping you experience the bold difference! Call us today at (904) 379-1648!

Extending the Life of Your Air Filter

Your air filter isn’t just key in ensuring that the air you breathe is clean — it’s also a crucial component with regard to your HVAC’s overall functionality and long-term longevity.

This is why it’s important that you be mindful of your air filter, it’s quality, and it’s overall lifespan.

A clean and well-maintained air filter will translate to a clean and well-maintained home, so you’ll want to make sure you’re getting the most out of it! Here are a few easy ways to do so:

Keep your air conditioning fan set to “AUTO”

When your A/C fan is set to the “ON” position, it’s going to be blowing continually, rather than only when it needs to. This alone can be an energy (and money) waster, but it also will grind down on your air filter’s lifespan much quicker.

Because air is being sucked in and cycled through on a non-stop loop by your blower, your air filter is going to absorb contaminants at a faster rate, thereby clogging it and also forcing your system to work harder.

Setting your fan to “AUTO” will not only mitigate this issue and expand the overall lifespan of your filter, but it will also help your entire HVAC unit to run more efficiently.

Set regular replacement reminders

The fact that a person needs to replace their air filter at regular intervals is mostly common knowledge.

But forgetting to replace that filter in a timely manner is also common.

Depending on your home’s indoor air quality and your personal health, it’s important to have an idea how often you want to replace your air filter. Once you’ve determined that timeframe, setting an alarm on your phone or writing the chore into your calendar is a simple way to remember to change the air filter, thereby reducing the likelihood that yours will become clogged, wet, or otherwise damaged.

Know your household’s requirement and plan accordingly

Did you know not all air filters are created equal? This is because they are not a “one size fits all” type of item. For one, you need to know what specific filter measurements fit your unit in order to ensure maximum dirt and dust reduction.

For two, you actually have a variety of air filter options based on filter rate and strength.

In this case, you’ll be looking out for the MERV rating, which indicates just how many particles your unit can catch (and how big those particles can be).

  • MERV 1 through 4 filters are the most common in households, though the least effective.
  • MERV 5 through 8 filters will function more efficiently overall.
  • MERV 9 through 12 filters will be the most effective at improving and maintaining healthy indoor air quality.

But what else helps to expand the life of your air filter? Routine HVAC maintenance! If you’re ready to schedule a maintenance appointment for your HVAC unit, call Bold City Heating and Air today at (904) 379-1648! Not only are we your locally trusted heating and air conditioning experts in repair, maintenance, and installation, but we’re dedicated to helping you experience the bold difference!

Help! What’s the black stuff coming out of my air conditioner?

Maybe it’s time to look up — at your air conditioning vents, that is. If you’ve been noticing a consistent output of black particles from your HVAC system, it may be easy to let your fears slowly build up alongside the matter on your vents, but we think it’s time to eliminate both.

So, you may be wondering: what exactly are those black particles? It could actually be several things! Potentially, it’s …

It’s What’s In the Air

Sometimes the culprit of the black particles blowing out of your HVAC system is not a result of the HVAC itself; rather, it’s the result of what’s near to your system.

For example, if you have a fireplace or multiple candles in your home, soot and smoke may be inadvertently sucked in and trapped within your system, only to be spat back out as “that black stuff.”

Dark dust particles that tend to float about your home or behind your ducts may also get pulled in, meaning the dark particles aren’t a threat to your health so much as they are an indication that you need to clean your home and change your air filter.

It’s Mold Spores

A more concerning problem — and a threat to your health — mold spores are commonly found in your air conditioning system because it is dark, moist, and warm by default.

That humidity means mold will naturally grow in and around your ducts, leading to its circulation around your home when the air conditioning fan pulls it in. Mold can also end up trapped around the fan motor itself, leading to its perpetual presence until your system is cleaned thoroughly by a professional.

You’ll notice mold because the spores are more likely to appear as black flakes around your vents, rather than as dusty particles.

It’s What’s Inside of Your Unit

When the components of your HVAC are burned or otherwise deteriorating, that breakdown will make itself known as black particles.

Deteriorating duct liners, for instance, will be easily carried through air conditioning vents and may even end up on your walls. Meanwhile, a burnt component — such as a heat exchanger — will produce soot internally, resulting in black particles that appear more like ash than dust.

In this case, you may need to completely replace a component or overhaul your system.

Don’t wait until your indoor air quality suffers to call for help. Here at Bold City Heating and Air, we don’t just care about ensuring the adequate maintenance of your HVAC unit, we care about how that maintenance can result in the long-term well-being of those who live in your home! If you’re ready to schedule an inspection or other routine HVAC work, contact us today to experience the bold difference and get the best AC repair Jacksonville!

Tricks to Maximizing the Effectiveness of your AC Unit

We have written several blogs in the past all about the different ways you can save money in the summer when it comes to your air conditioning. Tips such as, making sure windows and doors are properly sealed, that your ducts are free of obstructions, that you change your filters every three months, and so on. If you would like to reference these suggestions, you can visit those blogs HERE.

This summer, we’re back with a couple additional tricks to make sure you can really get the most out of your air conditioning dollars, ensuring your system is functioning to the best of its ability.

Keep your thermostat away from the heat.

This is an effective adjustment that can help your system remain accurate to the true temperature in your house. If your thermostat believes it’s warmer in your home than it actually is, it could be pumping additional cold air into your house that is unnecessarily driving up your costs. Take some time to observe the position of your thermostat throughout the day, is it in the sun, near a window, or maybe by a door that is frequently used? All of these little details could make a big difference when it comes to how often your system will kick on throughout the day – regardless of whether the temperature in your home is actually heating up. If you believe your thermostat may not be in the best place, contact your friends at Bold City Heating and Air to come out, and we would be happy to take a look for you.

Place your air conditioning unit in a shaded area

This may not seem like much, and could sound like a hassle if not already the case, however having your outside unit in the shade could save your system a lot of work when it comes to cooling the air for you. You see, air in the shade is already cooler than the air that’s been cooking in direct sunlight. Therefore, if your air conditioner is in the sun, its efficiency could be affected. If at all possible, you should move your unit to a place where it remains shaded throughout the day, such as under a tree or structure. If you think that your unit may not be in the best location, again, you can give us a call at any time, and we can come out and discuss your options with you.

There’s no avoiding the fact that when summer rolls around, things heat up, leading to outrageous cooling bills. There are little things we can do, however, to not only lessen the sting, but also save energy, which is also good for the environment. For more energy saving tips, or if you think you’re due for an inspection or any type of air conditioning repair Jacksonville FL, give us a call at (904) 379-1648, or visit our contact page. Be BOLD and hire the best, with our 100% satisfaction guarantee.

In Knots and Coils: Fixing Your Evaporator Coil

The loss of your air conditioning Jacksonville FL is probably the last thing you need in the midst of the relentless July heat.

And when you start to notice high energy bills in tandem with longer cooling times while lazing around the house, it’s easy to break a sweat in figuring out where, exactly, to point your finger. If this sounds a little too familiar, we’d like to take this opportunity to introduce you to a key element on your home’s cooling system: your evaporator coil.

A single piece of your overall HVAC unit, you may think to fix a damaged or inefficient evaporator coil would be a quick fix… but that isn’t always the case.

What is an evaporator coil?

The evaporator coil is the coil of your HVAC unit that aids in cooling and dehumidifying your home.

It is one of the most important components of your system, as it plays a major role in regulating your home’s temperature year-round.

How do I know if something is wrong with the evaporator coil?

If your home is becoming more hot and humid despite constantly turning down the temperature on your thermostat, your evaporator coil might be in need of attention.

For one, it may be an issue of cleaning. When the coil collects dirt and debris, it won’t be able to absorb any moisture from the air around it, rendering it essentially ineffective.

Leaks of the coil may also occur, however, when the joints are otherwise not connected well or if portions of the coil are corroded and weak. A leaky evaporator coil will lead to a loss of refrigerant in your overall HVAC system, and thus a warmer indoor temperature.

Okay, what do I do from here?

If the evaporator coil is in need of a cleaning or routine maintenance, a simple replacement may be all that’s in order.

But in some cases, replacing your entire unit may actually be more cost-effective. You should opt to replace the entire unit instead of a single coil if:

● Your A/C unit is more than 8 years old
● Your evaporator coil is an obsolete model
● Your evaporator coil relies on R-22 refrigerant (as the industry standard is currently being transitioned to the R-410A refrigerant)

If you’re unsure about what may benefit your system the most — or if you’re in need of a professional diagnosis for your evaporator coil — be sure to contact Bold City Heating and Air today! A locally owned and trusted Jacksonville business who is dedicated to ensuring that you experience the bold difference, we guarantee we can blow some cool air on your summer stresses.


Now that summer is here, you can anticipate walking out your front door and being slammed by a wall of humid air just about every morning, even if the sun hasn’t been up all that long.

One of the most common (and dreaded) factors about Florida weather, the humidity, is usually only escapable upon setting foot indoors and closing the door securely behind you. But what if it’s still humid in your home?

Why isn’t your HVAC system dehumidifying the air as it should?

  1. Your refrigerant is leaking
    A refrigerant leak is actually one of the most common air conditioning problems. Refrigerant is a working fluid that serves to remove heat and moisture from your home and effectively move it back outside.But your refrigerant lines are susceptible to daily wear and therefore… daily tear. And when they’re a little older, they’ll likely leak or lose overall cooling power, meaning your home will remain more humid until they are properly repaired.
  2. Your ducts are leaky

    If the rooms in your home are only becoming increasingly difficult to cool or heat during a given season, leaky ductwork may be to blame. When your ducts are not secure at the joints or are otherwise not properly sealed, outdoor air is going to pass more easily both in and out of your home, meaning you’ll be out of control of the indoor temperature and also out of more money as your electric bill begins to skyrocket.

    If you’ve noticed humidity creeping in where it shouldn’t, consider calling your local professionals to come and test your ducts for leaks. They can then seal or repair them accordingly.

  3. Your evaporator coils are dirty
    Evaporator coils perform a similar task to that of your refrigerant — they’re designed to absorb surrounding heat and moisture, rendering your home both cooler and drier. When your coils get dirty, however, they won’t be able to do their job. Thus, the humidity will move back in pretty quickly and spoil your summer comfort.If you believe your coils are covered in a layer of grime, you’ll want to hire a reputable air conditioning company to come out and clean them properly.

Don’t let the sweltering heat bog you back down. If you’re tired of the humidity and ready to take advantage of a free air conditioning estimate, contact Bold City Heating and Air today! Not only are we your trusted heating and air conditioning Jacksonville FL experts in repair, maintenance, and installation, but we’re dedicated to helping you experience the bold difference.

Why are my ducts making popping noises?

Why are my ducts making popping noises?

Hearing all sorts of snaps, crackles, and pops may be delightful when you’re pouring milk into your cereal, but not so much when you realize it’s your home making those noises. However, the good news is not all odd sounds are a sign of danger.

Popping ducts, for instance, are actually relatively common and easy to fix!

But if you’re wondering why, exactly, those popping noises are occurring, the answer is probably just the good ol’ Florida weather, which sees dramatic fluctuations in pressure throughout the year.

Ducts frequently pop due to changes in pressure, and both the size and shape of your overall ductwork will determine how your system will react to such changes in surrounding pressure.

For instance, round ducts are most capable of withstanding changes in pressure, which makes them the quietest duct shape. Rectangular or square ducts, however, will be more likely to pop. Similarly, pressure increases will cause your ducts to expand, leading to popping and rattling once they contract again.

In either case, you’ll want to contact your local professional to modify your ductwork properly, so as to increase your ductwork’s ability to withstand changes and pop less.

Additionally, your ductwork has a sheet of metal that will also expand or contract in response to pressure changes and the thinner it is, the more it will pop.

If you find that the popping is relentless even with round, clean ductwork, you may want to invest in a thicker sheet of metal for your duct system.

But here at Bold City Heating and Air, we understand that any noise your HVAC system makes just might be cause for stress, especially if you aren’t sure who to turn to. That’s why, if you’re left scratching your head over your ducts, indoor air quality, or general maintenance, be sure to contact us today!

Bold City Heating and Air is a family-owned, state certified, heating and AC repair company dedicated to ensuring that you experience the bold difference.

Defeating Dust In Your Home: What You Can Do Differently

Defeating Dust In Your Home: What You Can Do Differently

If your feather duster is your weapon of choice, we commend you on your commitment to dusting and cleaning your home! But, sadly, a feather duster won’t arm you properly against poor indoor air quality if you’re not approaching your HVAC system correctly.

We get it — defeating the dust bunnies ravaging your home and health can feel impossible, especially when you’re contending with whatever pollutants blow through the front door with you on any given day. But it doesn’t have to stay that way.

So, before you reach for yet another allergy pill, here are three steps you can take to reduce the dust and improve the air quality in your home first:

Clean Out Your Ducts

Nothing makes you realize just how behind you are on your spring cleaning than… when summer rolls around. Seasonal changes aside, you know you’ve officially hit the, “it’s been too long” mark when you dust and dust and dust, but your sniffles just always come back around.

Step one to reducing dust is to simply catch up on cleaning out your ducts and ventilation system — take those particles out of circulation completely.

Seal Your Ducts

You’ve cleaned out your ducts? That’s great! Now, the key is to maintain them. Leaking air ducts are one of the most common sources of perpetual dust, which is why step two is to have your ducts sealed by a professional so that more dust isn’t simply pulled back into your system post-cleaning.

And if you’re not sure whether duct-sealing is warranted, we recommend you schedule a routine duct inspection with your local professionals.

Take Advantage of Your Thermostat

While you’re dusting your home, you can actually find a little help in the form of your thermostat. By switching your thermostat’s fan to the “ON” position, the blower will circulate air continually throughout your home, essentially pushing dust particles back through the return vent and trapping them in an air filter, making it easier to remove them altogether.

Once you’re done dusting, however, remember to switch your fan back to “AUTO” so that you don’t waste extra energy!

If you’re struggling to keep up with the battle to keep your home dust-free, know that you don’t have to give in to relentless sneezing and wheezing. Instead, be sure to call Bold City Heating and Air today! When you schedule an appointment with the company who offers best air conditioning repair Jacksonville FL, you’ll experience the bold difference both in and around your home.

Don’t Let Your Wallet Feel The Heat: Summer Energy Saving Tips

Don’t Let Your Wallet Feel The Heat: Summer Energy Saving Tips

We all know the allure of a heat-induced afternoon nap. Whether you’ve been mowing the lawn, watching the kids at swim practice, or just going for a walk, being out in the summer heat for too long during the day can really suck the energy out of you.

But does it have to suck the energy from your home and your wallet, too? The answer is no! Not if you take the right steps:

Watch your windows

One of the easiest ways to save money on cooling costs is to simply seal and cover your windows. Blackout curtains will deny entry of sunlight in your home, reducing the need for cooling by virtue of designing your own indoor shade. Also, be sure to check around your window edges, where cracks and structural inconsistencies can be the culprit for unwanted warm air flow — if you come across any leaks, use caulk as a quick and efficient DIY solution.

Program your temperature changes

Setting your thermostat to “cool” is the natural action to take when lounging around at home in the mornings and evenings. But during the day, you’re likely away at work while the kids are at camp or with a friend. When nobody is home, you can actually save money by turning your HVAC system off or setting your thermostat to a higher temperature. Particularly if you have a Smart Thermostat, you can program is to start cooling down prior to your return at the end of the day.

Invest in preventative maintenance

Nobody wants to be drenched in sweat and fuming further when their HVAC system breaks down during the blistering summer months. By investing in preventative maintenance, you’re not only prolonging the life of your AC system — thus avoiding costly replacements — but you’ll actually be saving your money by increasing your system’s overall efficiency. And as a bonus? You may actually protect your warranty, as many systems require annual maintenance by a qualified professional to stay active.

If you’re ready to start prepping your HVAC system for the summer, contact Bold City Heating and Air. We’re a locally owned and trusted company, so call us today to schedule your pre-summer inspection and experience the bold difference!

We assure you the best heating, ventilation, and AC repair Jacksonville. 

The Importance of Air Quality

The Importance of Air Quality

The heat of the coming summer has a lot of us around Jacksonville already reaching for the thermostat to bring in some cooling reinforcements against the sweltering temperatures. While the comfort of a well-cooled home or office is a nice sanctuary against the summer (or late spring) heat, that comfort can disappear quickly if you or a loved one are susceptible to the angry inflammation, stuffy head and watery eyes associated with seasonal allergies.

Pollen is a byproduct of the natural beauty that surrounds us here in Northeast Florida. And while we wish no harm on any of the beautiful local flora, we could stand to have less pollen to sneeze through in our homes. Pollen enters the house attached to shoes and clothes, and through open doors and windows. Proper maintenance and regularly changing out of the filters in your AC system are easy ways to fight pollen in your home.

Dirty filters and dusty HVAC systems can lead to problems with excessive condensation as well. One of the issues that comes with the rising temperatures of summer is an increase in the humidity in the air. This can lead to mold and mildew infiltrating your system due to clogged lines and blocked filters. The importance of maintaining and monitoring your HVAC system cannot be expressed enough.

Pet dander can also trigger sneezing fits, and the increase in temperatures can lead to your pets shedding their coats. Loose pet hair and excess dander often accompany an increase in temperatures when the seasons change. Regular brushing and general grooming are not only good ways to keep your pet healthy and happy, they’re excellent methods of minimizing the impact that pet dander has on you and your loved ones.

If you are experiencing any of these issues, don’t hesitate to give us a call to set up a consultation on cleaning, maintaining or replacing your AC system today!