Some automobiles incorporate an orifice tube in place of the accumulators. The orifice tube does the same function as the accumulator. It makes the refrigerant expand, thereby lowering its pressure before it enters the evaporator. It also makes sure that the refrigerant flows at a constant rate. As with any part of the automobile, the orifice tube may also get contaminated with impurities over time. Replacing a damaged orifice tube is necessary for the proper functioning of the AC system. The video below demonstrates the installation of an orifice tube.
Video Transcript:
Now, we're ready to install the new orifice tube. All you want to do is, with your refrigerant oil, keep the O-rings on the orifice tube wire; this helps installation. An orifice tube is directional. There will be an arrow located on it and that is the flow of the refrigerant, in this case going down.
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