The plastic expansion (orifice) tube is located
between the following areas:
The plastic expansion (orifice) tube has a mesh screen (3) and
orifice. The plastic expansion (orifice) tube provides a restriction to the
high-pressure liquid refrigerant in the liquid line. In this way, the
plastic expansion (orifice) tube meters the flow of refrigerant to the evaporator
as a low-pressure liquid. The expansion (orifice) tube and orifice are
protected from contamination by filter screens on both the inlet and outlet
sides. When system diagnostics indicate a restricted expansion (orifice)
tube , you may need to replace the plastic expansion (orifice) tube. If
you find any of the following items on the screen remove them with compressed
air:
Reuse the expansion (orifice) tube if the following conditions exist:
| • | The plastic frame is not broken. |
| • | The brass expansion (orifice) tube is not damaged or plugged. |
| • | The screen material is not torn. |
| • | The screen is not plugged with a fine gritty material. |
