Tag: ac system contamination

A/C system restriction.

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.