If you’ve ever wondered about the inner workings of ductless mini-split systems, you’re in the right place. Doc Dancer installs Bryant ductless mini-split systems, which rely on several important parts to provide the comfort your home needs. In this comprehensive guide, we will delve into the intricate details of the various components that make up mini-splits, shedding light on their individual functions and contributions to the overall efficiency of your heating and cooling setup – allowing you to maximize your ductless mini-split.


The Condenser Unit

On the exterior of your home, you’ll find the condenser unit, which is either a mini-split air conditioner or a heat pump. This outdoor unit contains many main components, including:

Control Board

The control board serves as the brain of the mini-split condenser unit, coordinating the functions of various components to ensure seamless operation. It receives signals from thermostats and other sensors, directing the compressor, fan, and other parts to work together harmoniously. This orchestration is crucial for maintaining precise temperature control and energy efficiency.


At the core of the condenser lies the compressor, often considered the heart of the cooling process. The compressor’s primary function is to pump and pressurize the refrigerant, transforming it from a low-pressure, low-temperature gas into a high-pressure, high-temperature gas. This compressed refrigerant is then ready to release heat as it moves through the system.


Working in conjunction with the compressor, the capacitor provides an extra boost of electrical energy to kick-start the motor. This is particularly important during the system’s startup, ensuring a smooth and efficient operation. The capacitor stores electrical energy and releases it when needed, enhancing the overall performance of the condenser unit.

Condenser Coil

The condenser coil is responsible for releasing the heat absorbed from the indoor air. As the high-pressure, high-temperature refrigerant enters the condenser coil, it releases heat to the surrounding outdoor air. This phase change transforms the refrigerant back into a liquid state, preparing it for the next cycle of the cooling process.

If you have a ductless heat pump, the condenser unit will also absorb heat from the outdoor air when in heating mode. Refrigerant cycles this heat energy back indoors to the air handler, where it is released to warm your indoor air.

Condenser Fan

Mounted within the condenser unit is a fan that’s crucial for expelling heat into the outdoor environment. As the refrigerant releases heat in the condenser coil, the fan assists in the rapid dissipation of this heat. This ensures that the refrigerant is ready to absorb more heat during the next cycle, maintaining the efficiency of the entire cooling system.

Reversing Valve

For ductless mini-split system heat pumps, the reversing valve is responsible for reversing the flow of refrigerant, altering the system from a cooling mode to a heating mode. During the cooling season, the refrigerant flows in one direction, absorbing heat from the indoor air and releasing it outside. However, when the heating mode is activated, the reversing valve switches the direction of the refrigerant flow.


The Air Handler

Mounted on the walls or ceilings, multiple indoor units distribute the conditioned air throughout the room. Each indoor air handling unit contains:

Evaporator Coil

At the heart of the air handler unit is the evaporator coil, a pivotal component responsible for cooling the indoor air during the air conditioning mode. As warm air from the room is drawn into the air handler, the refrigerant within the evaporator coil absorbs the heat, leaving behind cool and comfortable air to be circulated back into the living space. When in heating mode, this coil releases heat into the space to warm the air.

Blower Fan

Mounted within the air handler, the blower fan is tasked with distributing the conditioned air throughout the room. It propels the air across the evaporator coil and into the living space at the desired temperature, ensuring a consistent and comfortable environment. Mini-split air conditioners and heat pumps deliver conditioned air directly into your home instead of using ducts like central forced air systems.


To provide personalized comfort, many air handlers come equipped with adjustable louvers. These louvers allow you to control the direction and distribution of the conditioned air. Whether you prefer a focused stream of air or a broader distribution, the louvers give you the flexibility to tailor the airflow to your liking.

Air Filter

Ensuring the indoor air is clean and free of dust and allergens, the air handler contains an air filter. This filter captures particles as air passes through, enhancing indoor air quality and contributing to a healthier living environment. Regular cleaning or replacement of the air filter is essential to maintain optimal performance.

Remote Control

The air handler unit often includes a receiver for the remote control. This allows users to adjust settings such as temperature, fan speed, and mode with ease. The remote control adds a layer of convenience to the operation of the ductless mini-split system.


The Conduit

The conduit runs between the indoor and outdoor units, serving as the pathway for crucial components including:

Refrigerant Lines

Refrigerant tubing carries refrigerant, the heat exchange medium, between the outdoor unit and indoor units. In the cooling mode, the refrigerant absorbs heat from the indoor air at the evaporator coil and releases it outside at the condenser coil. During the heating mode, this process is reversed, with the refrigerant extracting heat from the outdoor air and releasing it inside.

Power Cable

Running alongside the refrigerant lines is the power cable. This cable is responsible for supplying electrical power to the outdoor unit and indoor units. The power cable ensures that mini-split systems receive the necessary electricity for energy-efficient operation.

Condensate Drain Line

While not always housed within the conduit, the condensate drain line is a key component in managing moisture produced during the cooling process. This line allows condensed water, a byproduct of the cooling cycle, to be safely and efficiently drained from the indoor unit to the outdoors. Proper drainage prevents issues such as water damage and mold growth.


Caring for Ductless Mini-Split Systems

From the condenser unit to the air handlers and remote controls, each part plays a crucial role in the overall efficiency and effectiveness of ductless mini-split heating and air conditioning systems. Armed with this knowledge, you can make informed decisions about maintenance, troubleshooting, and optimizing the performance of your ductless mini-split system.

Doc Dancer Heating & Air takes pride in keeping you well informed about the technology that keeps your home comfortable year-round. Take a look at our Ductless Mini-Splits FAQ page. If you’re thinking of installing mini-splits in your home, Bryant ductless equipment is a great choice for energy-efficient heating and cooling! For installation of Bryant mini-split systems, contact us today