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One of the major components in the Air Conditioning system is the Expansion device. It regulates the flow of gas inside your car Air Conditioning system. The Expansion valve receives the cool liquid refrigerant under high pressure circulated by the receiver-drier. It allows the liquid to pass through an orifice tube by sensing the temperature of the Evaporator, or Cooling coil. According to your cooling demands, the Expansion valve releases the refrigerant. If you increase the cooling level of your BMW A/C system, the expansion valve expands to release more refrigerant. And if you decrease the level, it slows down the flow of refrigerant.
The Expansion valve has three pressure points to regulate the amount of refrigerant entering the Evaporators. They are the Evaporator, bulb and the spring. If the A/C Expansion device for your BMW does not work properly, you will feel the difference in the usual cooling effect of your Air Conditioning. At Discount AC Parts, you will find quality car parts at wholesale prices. We offer high quality auto replacement parts at incredibly low prices.
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