How a Faulty Thermostat Will Affect Your Heating in Dunwoody, GA

Wednesday, November 12th, 2014

The thermostat in your home is the instrument that controls when your heating system turns on and off. It may be a small device, but it is an important one, and when your thermostat malfunctions it can cause several kind of problems for your heating system in Dunwoody, GA. It can sometimes be difficult to diagnose a faulty thermostat, because the problems that develop can look like other issues. We’re going to outline below some of the more common effects a faulty thermostat can have on your heating system, but for all your heating repair needs, call the people you can count on: Cool Air Mechanical.

Problems Caused by a Faulty Thermostat

Here are some of the more common problems that can develop from faulty thermostats:

  • Short-cycling – short-cycling is the rapid turning on and off of your heating system. Short-cycling can cause overheating and damage, so it’s important to repair short-cycling as soon as possible. A couple of reasons why a thermostat can cause short-cycling is faulty wiring and too much dirt and dust on the instrumentation inside the thermostat.
  • No heat – there are a couple of ways a thermostat can cause your home to be without heat. If your thermostat uses batteries and the batteries die, this will cause the thermostat to turn off completely. Another problem can be the settings; make sure your thermostat hasn’t accidentally been switched to off or cooling. If you have a programmable thermostat, check to see if the program has been changed. Lastly, corroded or faulty wiring can result in no heat as the connection between the thermostat and the furnace may be damaged.
  • Reading the wrong temperature – older thermostats need to be calibrated properly in order to work correctly. If the calibration of your thermostat isn’t correct, it can misread the temperature inside your home, leading to incorrect temperature setting.

Your thermostat is the control center for your heating system in Dunwoody, GA. If you experience problems with your thermostat, or feel it may be time for a new one, call Cool Air Mechanical and schedule an appointment with one of our experts.

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Signs That It’s Time for New Commercial HVAC Installation in Dunwoody, GA

Thursday, September 25th, 2014

Your commercial HVAC system is important to your business, keeping clients, customers, tenants, and/or employees as comfortable as possible. These large systems are built to last a long time, but any unit will fail eventually and require new commercial HVAC installation. So how do you decide whether you need a new system or if you only need repairs?

Often, problems with your commercial unit simply indicate the need for repair. With commercial units, every component of both your heating and air conditioning system is combined in a single outdoor cabinet. As this cabinet is usually placed on the rooftop and is often fairly exposed to the outdoor elements, repairs are to be expected from time to time. Usually, a technician is the best person to decide whether it’s best to repair or replace your system. But the following signs may indicate a need for replacement.

  • Frequent Repairs: Because your commercial heating and air conditioning unit is so large and complex, you should expect to call for repairs from time to time. But if you have had to call for repairs many times in recent years, it likely means that parts of your AC are failing beyond repair. Simply put, replacing your entire unit will be less expensive than replacing failing parts one by one.
  • High Energy Bills: High energy bills may indicate a number of problems with your HVAC unit, many of which can be fixed with repairs. But if you’ve scheduled maintenance and made any necessary repairs, high bills could actually indicate that many components of your HVAC unit are too worn to efficiently cool or heat your business. This is particularly true of units that are over ten years of age.
  • Old Age: Older systems are more likely to break down right in the middle of a busy work day. Check the expected lifespan of your unit and be sure to replace it before this time runs out, particularly if you’ve noticed problems with your unit in recent years.

If you need help deciding whether repairs will keep your unit running for a few more good years or if it’s time for commercial HVAC installation in Dunwoody, call the experts at Cool Air Mechanical today!

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How Air Conditioning Repair Can Improve Efficiency

Wednesday, August 6th, 2014

For most homeowners, it’s important to save money wherever possible. When your AC runs into problems, you may be tempted to put off calling for air conditioning repair to save some money until the problem seems more serious. But delaying repair can cause your system to break down sooner than you’d expect. Furthermore, your damaged system will most likely add to your energy bills. Calling for air conditioning repair at the first sign of trouble can actually improve efficiency.

If your system has trouble starting up, or if you hear unusual noises from your indoor or outdoor unit, notice limited cooling, or see ice along the evaporator coil of your unit, you may be tempted to wait to schedule repairs. Sometimes, problems don’t seem urgent enough to interrupt your daily life with a service call. However, you may spend a lot more money in cooling costs than is necessary if your air conditioner needs repair.

Often, when one component of your AC system doesn’t work quite the way it should, the other components must work harder to compensate. Your system must run for a longer time period to get your home to the correct temperature. Because of this, you end up paying more for problems such as these.

  • Frozen Coil: The indoor coil is responsible for helping refrigerant to absorb heat from your home. It may become frozen if there is not enough airflow across the coil for evaporation to occur. When the coil is blocked, it cannot efficiently remove heat, which means it takes much longer to cool your home.
  • Faulty Fan Motor: The indoor and outdoor fan help to distribute air throughout the home and release heat outdoors. A faulty fan motor can prevent your home from ever reaching the correct temperature, reducing efficiency significantly.
  • Low Refrigerant: Refrigerant is vital to your air conditioner and, without the proper charge, your system is unable to efficiently remove heat from your home, which means your air conditioner runs for longer time periods.

When you call Cool Air Mechanical for air conditioning service in Dunwoody, GA, you may see lower cooling costs in the upcoming months. Call us today!

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How Does Humidity Affect Air Conditioning Systems?

Friday, May 23rd, 2014

Your air conditioner is responsible for making your home comfortable during the hot months of summer, but that equation involves more than just lowering the temperature. Humidity plays a huge role in determining the comfort levels of your household, and the levels of humidity in your home can affect your air conditioning system accordingly. When it comes to air conditioning service in Dunwoody, GA, residents need to keep that in mind: our summers are as humid as they come, and if you’re not careful, it could adversely impact your AC unit.

Humidity refers to the amount of moisture in the air. The higher the humidity, the more moisture is present. This affects our comfort levels because we sweat to cool off. As the sweat evaporates off of our skin, it lowers the temperature of our bodies. However, if the humidity in the nearby air is too high, the sweat won’t evaporate, and our bodies won’t get cool. Human beings tend to be most comfortable with relative humidity levels between 25% and 50%. As you probably know, things can get much steamier here in the South.

Your air conditioning system can help somewhat. As it cools the air inside of its system, the humidity solidifies into beads of condensate, which drip into a pan and can then be carried out via a line. That helps lower the humidity in your home and make it more comfortable. Unfortunately, it also tends to put a lot of extra strain on your air conditioner, which ends up using more power than it should to keep your home cool, and if too much condensate builds up in the system, it can overflow into the rest of the system.

In cases where the humidity affects the air conditioning system unduly, you can install a whole house dehumidifier to keep it in check. Not only will it improve comfort levels overall, it will reduce the strain on your air conditioner and lower the risk of a breakdown. For this and similar upgrades to your air conditioning, Dunwoody, GA residents have an answer in Cool Air Mechanical. We have the personnel and experience to do the job right, so give us a call today!

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Damaged Air Ducts and Air Conditioning Repair in Atlanta

Monday, July 8th, 2013

When you turn on your air conditioning system, all of the cool air circulated in your home has to travel through a series of ducts. While most homeowners don’t give this system of ducts a second thought, it is actually a critical part of your comfort. Any issues with your ducts can have a serious impact on your home’s comfort and on your home’s efficiency. If you need any kind of duct or air conditioning repair in Atlanta, just call Cool Air Mechanical. Check out our quick explanation of how damaged ducts can impact your home’s air conditioning system.

Over the years your ducts can actually experience quite a lot of wear and tear. Here are a few common things that can cause your ducts to be damaged.

  • Poor installation – Probably the most common cause of duct repair is bad installation. If your ducts weren’t properly secured they can rub or chafe against a ceiling joist or brace which can wear holes into the ducts.
  • Insects and rodents – Mice, rats, ants, cockroaches and other pests can be incredibly damaging to your home’s ductwork. After you have an exterminator take care of your pest problem, you should have an HVAC professional clean and examine your ductwork.

How to Tell If You Need Duct Repair

In most homes the ductwork is installed in the ceilings or under the floor which makes it difficult to tell if there are any problems with it. But there are still a few ways that you can tell if you need duct repair:

  • Hot or cold spots – If you notice that only certain parts of your house are getting cool air from your AC it could mean that there are holes and leaks in your ducts and you need them sealed.
  • Noises – Do you hear whistling, rattling, rumbling or any noises coming from your ducts? It could mean that you have cracks in your ductwork.
  • Inefficient operation – Keep an eye on your air conditioning bills. If you notice a sudden spike in your utility bill and your AC unit is functioning normally, you might have have a problem with your air ducts.

When you need air conditioning repair in Atlanta, make sure that you work with the professionals at Cool Air Mechanical.

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Atlanta Air Conditioning Repair Tip: Why Your AC Blows Warm Air

Tuesday, June 4th, 2013

There’s simply no substitute for the crisp, refreshing cool air that flows out of your air conditioning system. During the high temperatures and dense humidity of the summer, you need to make sure that your AC is ready to work well no matter what the outside temperature is. But one of the problems confronting homeowners occurs when their AC begins to blow warm air. This is probably the last thing you want to have happen. After all, you’re paying to stay cool. That’s what makes professional repair so important. Without the technical expertise and knowledge of an HVAC technician, your AC will simply not get the attention it deserves. Call Cool Air Mechanical today if you need Atlanta air conditioning repair services.

Why does your AC blow warm air? Let’s take a look at a few possible options.

  • Low refrigerant: Refrigerant is the chemical designed to produce radical temperature fluctuations under different pressurized conditions. But in order to absorb and dissipate thermal energy so that you can enjoy cool air, you need the correct amount of refrigerant in your system. During installation, your AC was “charged” with refrigerant, and shouldn’t expend it during operation. But if you have low refrigerant levels, then your AC may not function efficiently, and it may be subject to such problems as warm air. Low refrigerant is typically caused by a leak somewhere in the coils, because of either puncture or corrosion. The leak will need to be repaired before the system can be recharged. 
  • Dirty condenser coils: The condenser coils reside in the outdoor unit with the compressor. They have a single purpose: to dissipate the thermal energy from the indoors. The compressor heats up and pressurizes the gaseous refrigerant as it comes from the evaporator, and then sends it to the condenser. By raising the temperature above even the hottest outdoor air, the compressor allows the condenser coils to let the heat flow into the air by means of an exhaust fan. Obviously, this process cannot work well if there is dirt and other debris caked onto the coils. It impairs the dissipation process, and thus reduces the ability of the other components to do their parts.

Call Cool Air Mechanical today for comprehensive Atlanta air conditioning repair services.


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Atlanta Air Conditioning Repair Question: Why Is My AC Making a Banging Noise?

Monday, May 6th, 2013

We rely heavily on our air conditioners in Atlanta for the long hot summer. It keeps us cool and refreshed when the heat and humidity are at their highest. Of the various problems that can occur with your AC during the course of its service life, a loud noise can often be the most ominous. Is my AC broken? Should I turn it off? Such concerns and questions are common, but don’t let them get the better of you. When you need Atlanta air conditioning repair, look no further than the experts at Cool Air Mechanical. If you find that your AC is making a loud, banging noise, shut it off and give us a call today!

Let’s take a look at what that banging noise could be. While descriptions of sound are often subjective and different according to the listener, there are several possible causes.

  • Blower fan: One of the major components of your AC system is the blower fan motor in the indoor air handler. It’s responsible for extracting the warm air from the interior of your home, and sending cool air through the various air ducts installed throughout the home. It is vital to AC operation. But if there is something wrong with one of its components, or a loose fan blade, the result may sound like a banging noise coming from inside your air handler. If it sounds also like rattling, then it could be a loose panel, which has come loose.
  • Compressor: If you hear a banging noise coming from your outdoor unit, it could be a loose part, or a damaged fan blade. But, unfortunately, it might also be a problem with the compressor itself. A loose connecting rod, piston, or other internal part within the compressor may be broken. You’ll have to check with your local professional to see if your compressor can be repaired. Many of today’s compressors are sealed in order to prevent the accumulation of dust, and it may need to be replaced.

We hope this gives you some idea about the banging noise you hear coming from your AC. To schedule Atlanta air conditioning services, including repair and replacement, call Cool Air Mechanical today! 

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Atlanta HVAC Tip: Dryer Vent Cleaning Benefits

Monday, March 11th, 2013

When you turn your dryer on, it exhausts dust, lint, and other particles. Like any other part of your exhaust ventilation system, your dryer vent can get clogged with debris and require cleaning. Because of the lint that builds up during drying cycles, it can become both harmful to your indoor air quality and a fire risk. Don’t let your dryer vent become a hazard. For dryer vent cleaning in Atlanta, call Cool Air Mechanical today. We can clean out your vents in no time.

The average load of wet clothes that you put in your dryer contains about a half-gallon of water. Drying removes very small amounts of the fibers during this process known as lint. While there is a mesh filter that catches much of the lint produced by your dryer, it still allows lint through into the dryer ductwork. While your hot air exhausts outside, that lint can accumulate on the inside of your ductwork.

Let’s take a look at some dryer vent cleaning benefits:

  • Reduce fire hazards: Most homeowners are unaware of the risks clogged dryer vents pose. Every year, this causes fires. Having been heated at consistent high temperatures, lint is extremely dry and therefore highly flammable. When hot air cannot exhaust quickly and efficiently, your vent can overheat.
  • Increase dryer efficiency: You may notice that your clothes do not really dry to the same extent they once did, or that the outside of the dryer gets very hot. Keeping your dryer vent clean can actually make your dryer work less to heat and tumble your clothes, which can only improve its energy-efficiency.
  •  Improve air quality: Beyond the fire risks and energy improvements, blocked dryer vents don’t remove fumes and hot air exhaust from your home efficiently, which can significantly reduce indoor air quality.  

While often overlooked, dryer vent cleaning is a necessary part of home maintenance. It should be performed annually or on an as-need basis by a professional. At Cool Air Mechanical in Atlanta, we offer comprehensive ventilation and duct cleaning services. Call us today! 

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Atlanta Heating Installation Tip: Is a Heat Pump Right for Me?

Monday, December 10th, 2012

If you are considering a heat pump installation for your Atlanta area home, call the HVAC experts at Cool Air Mechanical. We can provide you with information about the different types of heat pumps available and help you decide whether or not this is a cost-effective choice for your home.

Benefits of Air Source Heat Pumps

Air source heat pumps are the most common type of heat pump system, and they provide both heating and air conditioning for your home. They are highly efficient at both in the right conditions because they draw in the air from outside the home and either warm it up or cool it. This means that the only energy used is the electricity to operate the compressor, which uses refrigerant to compress or evaporate the air depending on the time of year.

Typically, ductwork is connected to the indoor unit, and then the air is distributed throughout the home through the supply vents. The main disadvantage is the expense of installing ductwork if your home does not already have a heat pump system or furnace.

Ductless Mini Split Heat Pumps

If your home does not have existing ductwork, you can also choose to install a ductless heat pump system. These are also called mini split systems because they are not “split” into just the indoor and outdoor units. They consist of many smaller units installed throughout the home that are connected to the main compressor through conduits inside the walls. They are efficient mainly because there’s no chance of air loss through leaky ductwork.

The next time you are in the market for a new heater, call the Atlanta heating specialists at Cool Air Mechanical. We take pride in our installation services, and we can help you make an informed decision about which heating system is right for you.

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Atlanta Heating Question: What Is a Gas-Fired Infrared Heater?

Monday, October 1st, 2012

Put simply, a gas-fired infrared heater is a device that heats people and objects directly (as opposed to heating the air) and is powered by a gas-combustion burner. These types of heaters come in many shapes and sizes, and they can be very useful in a variety of situations. To find out which type of gas-fired infrared heater is right for your Atlanta home, you will have to compare the relative power, orientation and other features of the various available products.

Why Choose Infrared Heating?

While conventional forced-air heating systems work well in residential and office settings, they are extremely inefficient when applied to larger open spaces like those found in warehouses, garages and airplane hangars. In these types of situations, infrared heating is much more appropriate because the energy of the infrared rays the heaters emit is only converted into heat once they strike an object.

For example, an infrared heater mounted on the ceiling of a warehouse is not intended to heat the products stored on the top shelves – it’s meant to make the workers in the warehouse comfortable. It is very effective at this because even though it is located up high, its energy only turns to heat when it strikes the floor, allowing for the re-radiation of that heat at exactly the right level to keep people warm without losing heat to the vast open space above.

A forced-air system installed in a similar setting, even when the vents are right at floor level, will simply be pumping hot air up towards the ceiling (or out an open bay) leaving workers on the ground cold and uncomfortable. Of course, this technology isn’t just useful in a large commercial setting. It can also be applied on a much smaller scale in your own garage, allowing you to work comfortably with the garage door open even in the middle of winter.

For more information about gas-fired infrared heaters in Atlanta, give Cool Air Mechanical a call!

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