Sight Glass

A/C Refrigerant System Component Description

Sight Glass

If system is equipped with a sight glass, a properly charged A/C system can be confirmed when, with the A/C Clutch engaged and engine running at 1,500 RPM, the sight glass remains clear and bubble free.

• The mixture of R-134a refrigerant and refrigerant (PAG) oil may appear milky in the sight glass.