The air conditioning compressor is the heart of the AC system, and Freon is the blood. The compressor pumps Freon throughout the AC system, either the older type R12 which is expensive, or the new environmentally-friendly R134A Freon.
This expansion and contraction makes the Freon gas very cold. This cold gas makes its way via metal lines into the dash area of your vehicle to the evaporator core. This evaporator core is like a small radiator, except it has cold Freon circulating inside and not hot antifreeze. A small fan (the AC blower fan which you control from the control panel on the dash) sits in front of the evaporator core and blows air across this cold evaporator and then through the vents inside your vehicle.
The other objective of the air conditioning system is to remove the heat from inside the cab of the vehicle. This heat is removed by the Freon with the help of the AC condenser located at the front of the car (usually in front of the radiator). The Freon coming back from the evaporator carries the heat from the cab to the condenser via rubber and metal hoses. Just like your radiator, the condenser is lightweight aluminum with many internal winding coils.
The Freon travels through these coils and in between these coils are small slits or fins that the Freon is forced through. The condenser will have an electric cooling fan mounted in front or behind it to push or pull air through these fins to remove the heat from the Freon. Some vehicles still use the old fashioned fan blade driven by the engine to pull air across the radiator and the condenser.
Car Air Conditioning & Heating/Cooling System Symptoms & Warning Signs:
A/C System Doesn't Cool Vehicle To Set Temperature
Fan/Blower Does Not Work When Set In A/C Mode
Fan/Blower Is Louder Than Usual
Some Or All Of The Dash Controls Do Not Work
Heater, Top And Side Vents, Or Defroster Do Not Work
A/C Or Engine Makes Loud Noises When The Heat Or A/C Is Turned On
Vehicle Stalls Or Idles Roughly When A/C Is Turned On
Vehicle Runs Hot Or Overheats When A/C Is On
There Is Water On The Car's Floor
Electric Engine Cooling Fan Quickly Cycles On And Off
Unusual Odors Come From Interior Vents
A/C Unit Has Not Been Serviced Regularly
Windows Fog When Defroster Is Turned On
Car Air Conditioning Repairs
All Trans Auto Electrics and Air Conditioning follow the vehicle manufacturer's recommendations and use only R134a as the replacement refrigerant for the older R12 refrigerant. Late model vehicles need special attention with regularly servicing at a 2 year interval.
Beware of cheap shortcuts of the blend refrigerant pushers. As blend refrigerants are not recommended by anyone other than the refrigerant manufacturer & the sales person. All new cars are R134a worldwide; due to its non-flammable ozone friendly properties and millions of hours of in-service testing in all climates.
Our Car Air Conditioning Service list:
Identify The Type Of Gas In The System
Diagnose And Repair All Air Conditioning Problems
Remove And Replace The Filter Unit If Necessary
Check Condition Of The Compressor And Condenser Unit
Check Condition Of All Hoses And Wiring Harnesses
Pressure Test The System
Vacuum System For A Minimum Of 30 Minutes
Recharge With R134A Refrigerant, Fluro Dye And Oil