A compressor may also fail if there is sludge or debris in the air conditioning system. If the seals no longer hold, you will need a new compressor, as the seals cannot be replaced. The compressor may start leaking refrigerant and/or the AC oil. It is also common for the seals in the AC compressor to go bad. Sometimes replacing the entire compressor with a remanufactured one can be cheaper than replacing an individual clutch or bearings. If the bearing or clutch have failed, it is recommended that the compressor be replaced. The clutch can burn or the bearing can fail. The clutch is driven by a drive/serpentine belt, which engages the compressor when you switch on the AC. Consequently, it is a requirement to replace the orifice tube and the receiver dryer when replacing the compressor since some of the debris may have ended up there.įor an AC compressor to work, it needs a clutch, bearing, and an electrical connector. It is common for the internal parts of the compressor to come apart and disperse metallic debris throughout the system. These internal parts can fail, causing the AC compressor to stop working. The AC compressor has several moving parts (including pistons and valves). The compressor, the “heart” of the car’s air conditioning system works like a pump taking refrigerant, (R-12 in older cars, R-134a in 1995 and newer cars) and pressurizing it, passing it along to the evaporator. Not getting enough air flow? Check out or selection of blower motors, blower motor resistors, and cabin air filters.An AC system has many components: compressor, condenser, receiver dryer, evaporator, and hoses. We carry a variety of A/C parts, including A/C compressors, A/C condensers, A/C evaporators, A/C receiver driers, and A/C accumulators for most cars, trucks and SUVs. If your A/C system is not working correctly, O’Reilly Auto Parts is here to help. The blower motor then pushes air across the evaporator, resulting in cold air through the vehicle’s vents. This process absorbs heat, causing the evaporator fins to become cold. After the refrigerant leaves the receiver-drier, it passes through an expansion valve, which allows it to expand into a low pressure liquid so it can be turned into gas in the evaporator. This is usually found on the low pressure side of the A/C system, between the evaporator and compressor. If the A/C system has an orifice tube, there will be an accumulator instead of a receiver-drier. This high pressure liquid then goes to the receiver-drier to filter out any moisture to help protect the A/C system from contaminated refrigerant. The gas then flows into the condenser where it is cooled by air, turning the gas back into a liquid. On the high pressure side, the compressor pressurizes cool, low-pressure gas refrigerant, converting it to high-pressure, high-temperature gas. The cycle is split into two main intervals of high pressure and low pressure, based on the state of the refrigerant. This is referred to as the refrigeration cycle. These components work to move refrigerant through the system, converting it from a liquid to a gas, to provide cool air through the cabin vents. The major components of the A/C system include the compressor, condenser, receiver-drier or accumulator, evaporator, and an orifice tube or expansion valve. The air conditioning (A/C) system helps keep the vehicle’s cabin comfortable by cooling and removing humidity from the air.
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