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Automotive Technology

This guide will help with understanding the basics of Automotive Technology, maintenance, and repair.




Automotive Climate Control

Components of Automotive Climate Control system



The main components of an automotive's climate control system are:


Refrigerant: The most common refrigerant used in automobiles is R134a. This gaseous material is what helps keep a vehicle cool all year round. It will eventually need to be recharged in vehicles when the temperature in the cabin can no longer stay cool.


Expansion valve or orifice tube:  Removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator.


Evaporator: a small radiator inside the dashboard that changes the freezing liquid refrigerant to a vapor allowing cold air to enter the condenser which provides cold air to the cabin of the vehicle


Compressor: The power unit of the air-conditioning system that puts the refrigerant under high pressure before it pumps it into the condenser, where it changes from a gas to a liquid.


Condenser: A radiator positioned between the car’s grille and the engine-cooling radiator in which the gaseous refrigerant sheds heat and returns to a liquid state. 


Accumulator: positioned on the outlet of the Evaporator. This device helps regulate moisture in the air conditioning system.


Thermostat: Regulates flow of engine coolant from the engine to the radiator


The cabin air filter: serves to clean the air drawn in by your car’s ventilation system.


The blower motor:  The fan that pushes heated or cooled air through dashboard vents based on the climate system settings and the fan speed selected.


Heater Blower Motor Resistor: Reduces or increases the amount of air blowing through the dashboard vents based on the fan speed selected or, in an automatic climate control system, the interior temperature and other factors. 



A/C and Heat: Heating, Ventilation, Air Conditioning (HVAC) Service & Repair 

How Automotive Air Conditioning Works 
What Is Climate Control? 
Troubleshoot Air Conditioning 
The Mobile Air Conditioning Society (MACS) Worldwide 
Climate Control 
AriaZone Air Conditioning Training Manual