Description:
The air conditioning (A/C) electro-magnetic clutch mounts to the front of the air conditioning compressor and electrically engages and disengages according to commands from the A/C system. Compressor designs may vary from one manufacturer to the next as to internal design and components. The A/C system is divided into two sides: high-pressure and low-pressure. The low-pressure side connects to the inlet of the compressor and the high-pressure side connects to the outlet, or discharge, of the compressor.
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.
SOURCE: CAR CARE COUNCIL |
