The document discusses the key components of an air handler unit and their functions: - The evaporator coil extracts heat from warm indoor air to cool it. - The compressor compresses refrigerant to transform it from a gas to a liquid to remove heat. - The condenser coil expels heat from the refrigerant outside. - The expansion valve expands the refrigerant back into a gas to absorb heat inside. Together, these four main components work in a cycle to circulate refrigerant and cool indoor air for air conditioning.

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Different Parts Of The Air Handler Unit And Their
Functions
mmihomeimprovement.com/2022/03/29/different-parts-of-the-air-handler-unit-and-their-functions
An air handler unit consists of four primary parts. The four components are the
evaporator, condenser, compressor, and expansion valve. Each of these AC components
communicates with one another and has a particular purpose — to keep your AC
functioning like a well-oiled machine.
1. Coil Of An Evaporator:
We mainly install an evaporator coil in the interior unit of a mini-split AC. Whereas, in
the central unit, this coil is located in the air handler of a central system. The system’s
refrigerant is cooled to a low temperature before entering the evaporator coils. When
heated air from your house enters your HVAC unit, it is fanned over the cold evaporator
coils, which extract heat and cool the air. Fans situated behind the evaporator coil then
blow this cold air back inside, lowering the temperature of your home.
Most Companies make these coils out of Copper, although we can also make coils out of
steel or aluminum. Moreover, Copper is the ideal material. Firstly, Copper has superior
heat conductivity. Secondly, it is easy to maintain.
However, maintain your coils clean since dirt and dust can accumulate over time and
diminish their performance. This dust can also clog the condensation drain, resulting in
refrigerant leakage. While the air filter protects it, regular cleaning will help maintain
your evaporator coils in good condition.
2. The Compressor:
The compressor is the workhorse of air conditioning and is perhaps the most crucial of all
AC components. We normally install the compressor in the outside central and split
systems unit. The compressor consumes the bulk of an air conditioner’s electricity, and it
is typically the most expensive component of the system.
As the name implies, the compressor’s goal is to compress the refrigerant, which is heated
vapor. It arrives at the compressor. As a result, the compressor compresses it into a hot
compressed liquid.
As the air conditioning process proceeds, this is chilled and expanded to remove heat
from the inside air.
The size of the compressor will vary depending on the size of your air conditioner. You
can keep the most critical AC component in good working order by often checking for
refrigerant leaks, preventing dirt and contamination, cleaning the condenser coils, and

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keeping your AC properly lubricated. Always prefer professional cleaning over DIY
methods. You may approach air duct repair and replacement Atlanta.
3. Condenser Coil:
The condenser coil, located opposite the evaporator, draws heat from the refrigerant and
expels it to the outside environment. You can find it in your air conditioner’s external
unit.
The evaporator coil operates in the opposite direction of the condenser, with a fan
blowing heat away from it. You might feel hot air coming out from your air conditioner’s
outside unit if you stand outside it. The condenser emits the heat while transforming the
refrigerant from hot vapor to hot liquid.
4. Valve Of Expansion:
An expansion valve is a small device that sits between the condenser and the evaporator.
Because the refrigerant is now a liquid, it cannot absorb heat. After experiencing a
pressure decrease, the refrigerant expands into a gas and swiftly cools in the expansion
valve. This cooled gaseous refrigerant is then injected into the evaporator coils to repeat
the air conditioning process.
How Do AC Parts Work Together?
Now that you’re familiar with the key components of air conditioners, it’s a good idea to
understand how they all interact with one another.
Let’s begin with the cooling process. Firstly, the refrigerant is compressed and
transformed into a heated, high-pressure liquid in the compressor. Secondly, This liquid
flows towards the condenser coils, which are cooled by a huge fan. The expansion valve
follows, swiftly expanding the refrigerant and transforming it into a chilly, low-pressure
gas. This cooled gas is what keeps your room cool. All of this is happening in the
evaporator coils. Lastly, When the rings get cold, a fan in the interior unit circulates warm
indoor air over them, lowering the temperature.
What Are The Other Components Of The Air Handler Unit?
The building’s roof has an outside air conditioning unit. The above-mentioned AC unit
components are the most important. However, there are a few more:
1. A Filter For Air:
An air conditioner filter functions similarly to a screen mesh in that it keeps dirt, dust,
and other airborne particles away from the air conditioner. We can find it in the indoor
unit.
2. Refrigerant:

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We’ve spoken a lot about refrigerant above, and you might be wondering what it is. It is
the chemical that accomplishes natural cooling. It flows within an air conditioner’s
network of copper or steel tubes. Moreover, it has qualities due to which it compresses the
air and extends it to cool or heat a space.
R-410A and R-22 are common refrigerants, with the latter gradually becoming outdated.
For more information on AC refrigerants, see our page on them.
3. Fan:
The Air handler unit uses a fan to transport air from one component to another and blow
conditioned air into your rooms. Fans are also necessary to keep your external device
from overheating by dissipating heat.
4. Thermostat:
The thermostat is in charge of maintaining the ideal interior temperature. It is where you
tell your AC unit what kind of cooling you desire, and it turns the AC on or off to maintain
the ideal indoor temperature. It can readily read the temperature of your space because it
has temperature and humidity sensors built-in.
You may regulate your AC temperature from your phone using programmable or smart
thermostats, as well as establish clever instructions such as scheduling or geofencing.
Suppose you have a ducted air conditioner, like a mini-split or window unit. In that case,
you may utilize a smart AC controller, which functions similarly to a thermostat for
central systems.
Common AC Component Issues
An HVAC technician inspects the air conditioner for problems. As we all know,
mechanical equipment does not always want to keep running smoothly indefinitely, no
matter how much we would like it to. There are numerous frequent issues with air
conditioner components that might cause the AC to perform below optimally or stop
operating entirely.
These issues might take many forms. Typical examples include:
1. AC is emitting a noxious odor.
2. Dust and debris may clog your air filter.
3. The interior unit is leaking water.
4. Cold air is not flowing out of the air conditioner – this is a refrigerant issue.
5. Noises from the air conditioner
Aside from the discomfort, these issues may increase energy expenditures for your house.
As a result, it is preferable to have them repaired as soon as possible by a skilled
specialist. Immediately call commercial air duct and dryer vent cleaning Atlanta
to solve all these issues. They are professional and competent.

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Conclusion:
In conclusion, we can say that With your greater understanding of air conditioner
components, you should be able to comprehend better how your air conditioner works.
Furthermore, you are now eligible to identify any possible faults with your AC and
determine when to tune up your air handler unit.
Must Read: What Is The Purpose Of HVAC Diffusers And Grilles