LAMBORGHINI MIURA LAMBORGHINI MIURA
Symptoms of a restricted orifice tube.
A restricted orifice tube would cause a lower than normal low-side pressure.
A restricted orifice tube may cause frosting of the tube.
The restriction will cause a greater than normal pressure drop that can lead to the refrigerant vaporizing at that point .Vaporization of the refrigerant will produce cold enough temperatures to cause frosting.