Description: A specially formulated chemical used in the A/C system for exchanging heat. Generally speaking, cars older than 1995 models use R-12 refrigerant, also known as Freon® or CFC-12 (CFC stands for chlorofluorocarbons). R-12 contains chlorine, which depletes the earth's delicate ozone layer. For this reason, the production of R-12 in the U.S. stopped at the end of 1995. Cars 1995 and newer use R-134a refrigerant, also sometimes abbreviated as HFC-134a.
Purpose: Removes heat and moisture from the interior of the vehicle and releases it to the outside air. When circulating in the system, refrigerant also helps to move refrigerant oil to key parts throughout the A/C system.
Maintenance Tips/Suggestions: Symptoms of a low refrigerant charge include
poor cooling and frequent engagement and disengagement of the A/C
compressor. This may also be accompanied by an engine that changes
speed with the cycling of the A/C clutch and compressor. A low
refrigerant charge can also affect system lubrication, since good
refrigerant flow ensures the flow of refrigerant oil. The phaseout
of R-12 created a hotbed of confusion for motorists due to the
introduction of numerous alternative refrigerants. In turn, these
alternatives created confusion for technicians, who were then unsure
as to whether an alternative was safe, or even legal, for use. Since
R-134a has been the standard refrigerant for nearly a decade, issues
related to the R-12 phaseout have faded away. Nonetheless, there are
some important things to keep in mind if your car needs A/C system
service. First, A/C system service costs more than it did in years
past. Specialized recovery and recycling equipment, refrigerant
identifiers, leak detectors, certification and training, and ongoing
changes have increased the cost of A/C service. The threat of
cross-contamination, where different types of refrigerants wind up
being mixed together, is a nightmare for most technicians and shop
owners. That's why it's wise to seek out a professional technician
with a proven track record if your car needs A/C service.
Addtional information on
professional A/C Service &
Repair.
