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5
A Basic A/C Overview
Evaporator with Blower Fan
1
evaporator allows the refrigerant to absorb the heat from the air passing over it. The blower fan moves cool air out into the car
interior.
2
Compressor
The compressor pumps and circulates the refrigerant through the system.
Condenser
3
The condenser is a heat exchanger mounted at the front of the vehicle. Heat drawn out of the interior of
the car is expelled here.
Receiver/Drier
4
The drier not only dries refrigerant, it also filters the refrigerant and stores it under certain
operating conditions.
5
High Pressure Switch
detected, basically it acts as a safety switch.
S U C
3
In order to remove the heat from the air in the vehicle, the A/C
A pressure switch is used to shut down the system if high or low pressure is
1
L I Q
U I D
T I O
H O
N H
S E
O S
E
2
5
4
G R O
U N D
P O W
E R
The air conditioning system in your car is comprised of a compressor, condenser,
expansion valve, receiver/drier, and evaporator. Refrigerant (also known as Freon) is
compressed in the compressor and turns into a gas. In the condenser, this gas is cooled to a
liquid state and travels to the expansion valve. As the liquid refrigerant goes through the
expansion valve it rapidly cools in the evaporator. A fan blows over the evaporator and cools the
air that blows out your vents. The receiver-drier separates gas and liquid.
www.classicautoair.com • 866.435.7801 • OVERVIEW
OUTSIDE AIR
Receiver
Drier
Condenser
Expansion Valve
AIR FROM INSIDE VEHICLE
Evaporator Unit
COLD AIR INTO VEHICLE
Suction
Discharge
Valve
Valve
Compressor
Firewall
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