It's actually a gas, and it's known as refrigerant - depending on model year, it may be CFC-12 (R12) or HFC-134 (R134A). A lot of people call it Freon, but it's sort of a misnomer.. Freon is a trademark name by Dupont for a line of CFC and HFC refrigerants they manufactured, so it's not actually Freon unless Dupont made it and marketed it under that name.
Refrigerant which is R134a today, and compressor oil. Older cars (pre-1995) may have R12 refrigerant.
Refrigerant.
The air comes from the air outside and the air conditioning system in the car turns this into cold or warm air.
The 1939 Packard was the first car with a true air-conditioning system.
Automotive air conditioning is the ac unit in your car. It's what "conditions" the air in your car, ie keeping the temperature inside the car cool or warm.
No use for exhaust in car air conditioning
No, but it will effect the heater. The only fluid that will effect the AC will be your refrigerant known as R-134a
No cars "need" air conditioning. It is a personal preference of the owner. Most people would want air conditioning in their car as an option. Mississippi's hottest day was 115 degrees!
The only fluid in an air conditioning system is the compressor oil - the refrigerant itself, if you were in a situation where you'd be able to see it before it turned to a vapor, would be clear.
changes the air temperature inside
I am not sure what the national chain is where you can get the air conditioning in your car serviced. Ask your car manufacture or your local garage or ask family and friends.
If you want to get new air conditioning for your car, I would suggest you go to ABC Auto Care in Ventura, California. Rhodes Automotive is also a good place to get air conditioning for your car.
kwik fit
If a 1988 Lincoln Town Car is blowing both hot and cold air when the air conditioning is on, there could be a problem with the thermostat. There might also be a problem with the level of refrigerant in the air conditioning pump.