Know Your HVAC System Components: Major Components Of Heating and Air Conditioning Systems And Air Conditioning Service | Mansfield, TX

Know Your HVAC System Components: Major Components Of Heating and Air Conditioning Systems And Air Conditioning Service | Mansfield, TX

Photo By fstop123 at istock

HVAC systems, written in full as heating, ventilation, and air conditioning systems, play an essential role in maintaining indoor comfort within your Mansfield, TX, residence. Aside from keeping you and your family cozy during adverse weather conditions, they can also help remove or dilute hazardous gas emissions as well as filter dust, odors, and chemical contaminants.

HVAC units rely on chemical and carbon activated filters to keep these contaminants at bay. Your home’s heating and air conditioning service can also ensure that buildings and equipment last longer. This is by effectively maintaining room temperatures of between 69.80 and 75.20 degrees Fahrenheit and relative humidity levels of between 50 to 60 percent. As a result of the above-named benefits, it’s estimated that close to 100 million American homes have a functional air conditioning system.

Past that, only a few of them understand the various types of HVAC systems, how they work, what parts they’re made of, and their inherent components. This knowledge can help them ensure that their units remain functional all year round. It also assists in identifying the signs that show it’s time to schedule an HVAC service to prevent more inconveniences down the road.

In that regard, you should first understand the various types of heating and cooling systems that a heating and air conditioning service expert can install in your home. Your HVAC technician can mount a conventional heating and air conditioning split system.

These are the most common and mostly comprise both indoor and outdoor units. Besides split systems, your HVAC service contractor can also install a hybrid split system, ductless HVAC unit, or packaged heating and AC system based on your tastes and preferences.

Even though the physical characteristics of these units may differ, they’re typically made up of three major parts, heating, air conditioning, and ventilation. Heating and air conditioning service providers near Mansfield, TX, may also install a thermostat to help in adjusting the thermal conditions based on the prevailing weather conditions. These parts rely on the action of the following components to perform their functions.

Heat Exchanger

The heat exchanger along with the combustion chamber and blower motor are found within the furnace, which is the source of heat in most households. According to HVAC service experts, the heat exchanger’s main role is to facilitate heat transfer within the furnace.

It particularly exposes untreated air from your residence to the heat produced by the combustion chamber based on the current thermostat settings. The conditioned air then gets distributed indoors with the help of the ductwork installed by your heating and air conditioning service professional.

Some central heating systems may have an extra duct that allows cool air from your living space to enter the heat exchanger much faster, making your home warm up quicker. Although HVAC service experts consider the heat exchanger quite resilient due to its stainless steel and alloy composition, it may still get damaged as a result of standard wear and tear.

Cracks and holes may develop, creating a carbon monoxide hazard that you should never ignore. Carbon monoxide leaks, which are quite hard to discern since the gas is colorless and odorless, can not only cause death but also troublesome symptoms, ranging from nausea and headaches to dizziness.

Luckily, you can tell when there’s a leak by asking your heating and air conditioning service expert to install a carbon monoxide detector in your house. If leaks do happen, attempting to remedy the situation alone can quickly become catastrophic, so it’s best to leave the issue to professionals in heating and AC repair.

Combustion Chamber

The combustion chamber inside your home’s heating and air conditioning service is where the unit’s fuel combines with oxygen transported via a diversion in the return duct and another source of ignition to produce heat. If your home’s fitted with a gas furnace, the pilot switch is often the main source of ignition and in electric central heating systems, an electric switch is used for this purpose.

In oil or gas-burning furnaces, the fuel should first come into contact with air for it to vaporize so it can reach the ignition switch for combustion. If a fault occurs during the vaporization stage, the chamber may become flooded and collapse due to the pent-up pressure.

Under such circumstances, you may need to contact your heating and air conditioning service provider for a replacement. Depending on the type of HVAC system installed in your home, your technician can install an open or sealed combustion chamber. Most HVAC systems use open models since they’re cheaper. However, HVAC professionals recommend closed combustion chambers because they’re safer and more efficient. They can capture and relight escaped carbon monoxide particles, thereby protecting you and your family from the gas’s dangerous effects.

Blower Motor

After the air in the combustion chamber has reached the temperature prescribed by your home’s thermostat, the blower motor jumps into action, pumping the treated air through the ventilation components for distribution throughout the residence. It runs continuously during the heating cycle as well as after to ensure the conditioned air gets effectively distributed throughout the house.

You can notice as it goes on and off during the heating cycle since it produces a rumbling sound as it pushes the warm air indoors. During HVAC installation, your heating and air conditioning service professional can mount any one of several types of blower motors. However, most technicians recommend the variable speed models since they can adapt to blow at the same rate as the air circulating within your premises. This allows them to effectively compensate for HVAC issues associated with air circulation.

The Refrigerant and Refrigerant Loop

If your local heating and air conditioning service contractor installed a conventional HVAC system, then you may have noticed two components. The above-described components belong in the furnace, which is responsible for keeping your household warm during colder weather.

During the summer, your home relies on the air conditioning system or heat pump to remain cool under the relentless Texan heat. To do this efficiently, these units use the refrigerant, a chemical that’s known for its ability to change from gas to liquid and vice versa with ease since it’s a chlorofluorocarbon. Although these compounds can cause harm to people and the environment, they perform exceptionally when used in vapor compression refrigeration systems.

Past that, for the refrigerant to effectively reach the various components of your home’s air conditioning service, it passes through a network of pipes known as the refrigerant loop. Damage to these pipes may result in a refrigerant leak. That’s why you should always have them inspected by a skilled air conditioning service professional. Besides that, refrigerant leaks can lead to ice buildup within the system, consequently reducing its efficiency and prompting the need for repair or replacement solutions.

Compressor or Condenser Coil

Otherwise known as the condenser coil, the compressor is an essential part of your home’s air conditioner or heat pump. HVAC installation professionals often place it outside and its main job is to cool your indoors by releasing untreated air outdoors.

During such instances, it condenses or compresses the aforementioned refrigerant, changing its state from a warm gas into a cold liquid. A fan then blows air over the condenser coil to eradicate the heat and cool the refrigerant faster. After this process, your residential air conditioning service then distributes the liquid refrigerant to the evaporator coil via a network of aluminum or copper ducts.

To ensure that the HVAC system remains efficient all year long, air conditioning service experts advise that you keep dirt, grass clippings, and fallen leaves away from the condenser coil. They also recommend that you schedule an annual cleaning service with a professional technician to ensure that the outdoor unit remains clean.

If the system is relatively new, you should ask your HVAC service contractor to install an awning more shade. During the AC installation service, you should also make sure that the contractor leaves enough free space around the unit to guarantee effective air circulation.

Expansion Device

After the hot refrigerant liquid has left the condenser at high pressure, it enters the expansion valve, which should significantly lower its temperature and drastically reduce the pressure. Once the refrigerant’s pressure and temperature have lowered, it then travels to the evaporator coil as a cold liquid.

Evaporator Coil

Found inside your home’s air handler, the evaporator coil is a vital part of the larger air conditioning or heat pump system. Through several expansion valves and small nozzles, it sprays the refrigerant to help it change from liquid to gas quicker, leading to the absorption of heat, which in turn creates the cooling effect you experience during the summer.

During the process, your system’s fan blows warm air via the return ducts over the evaporator coil. After all the heat has been removed, it then distributes the conditioned air through the ductwork to the rooms of your home. Thereafter, the AC unit then sends the heated refrigerant back to the compressor for the cooling cycle to start all over again.

For the entire cooling process to be complete, warm air passes over the evaporator coil, causing condensation to occur. Consequently, this action lowers indoor humidity levels, making the house feel cooler during hot weather.

If you asked your heating and air conditioning service contractor to install a heat pump instead of a standard air conditioner, you may still be able to keep your indoors comfortable regardless of the conditions outside. Heat pumps can reverse heat transfer during the cold season, bringing in heat from outside and removing the cold air. Although heated air can make your indoors less humid, your air conditioning service provider can install industrial-grade humidifiers to help improve the air quality.

Past that, similar to most of the other HVAC components, the evaporator coil may also develop problems if you deliberately ignore its maintenance needs. For instance, condensation may start forming on its surface, a scenario that could result in mold growth and excessive dirt or dust accumulation. Leaks within the refrigerant line can also result in ice buildup on the evaporator coil even during the hot season.

Besides losing efficiency, such issues may lead to an unprecedented breakdown of the system and reduced indoor air quality. For example, failing to address mold and ice issues on time can obstruct airflow, arising the need for costly heating and air conditioning services in Mansfield, TX.


Air conditioning service professionals near Mansfield, TX, may install fans in homes with larger HVAC systems that may have an extensive network of ducts coursing through the building. Their main function is to regulate airflow, ensuring that it remains optimal.

You should probably have them installed if you live in a large house and notice that the HVAC components therein aren’t performing optimally. This phenomenon often implies that the air pressure may be too low within the ductwork and fans can help remedy the situation.

Although fans are used more commercially than in residential properties, you can ask your AC service contractor to install exhaust fans in the kitchen to help prevent smoke and condensation buildup.

Air Filters and Dust Collectors

Most ventilation systems seldom require air filters and dust collectors for efficient operation. However, it would be a good idea to have them installed by an experienced heating and AC service professional since they can trap pollutant particles, preventing them from being distributed indoors. This can go a long way in ensuring that the air you breathe is clean, thereby reducing the risk of respiratory infections.

Modern air filter models may have electrostatically charged pleats designed to capture even the smallest of microbes, including bacteria and fungi that could cause respiratory illnesses.

Air filters can easily be integrated into your system’s ductwork while dust collectors are much larger since they’re actively involved in eradicating contaminants from the air you breathe. For that reason, air conditioning service professionals around Mansfield, TX, recommend the usage of the latter in commercial settings rather than at home.

Request an HVAC Service Today

At Minuteman Heating & Air, we uphold the belief that every Mansfield, TX, homeowner deserves to reside in a comfortable house. Therefore, we offer a full range of heating and air conditioning services, covering AC installation, repair, and maintenance. We also provide heat pump and furnace repair.

Our technicians are trained in the latest HVAC industry codes and standards, which allows them to deliver professional and long-lasting solutions for common HVAC problems.