If the sight glass is blue/green, what condition does the refrigerant indicate?

A blue/green sight glass indicates that the refrigerant is dry, meaning it does not contain excessive moisture. In refrigeration systems, sight glasses are used to visually confirm the condition of the refrigerant within the system. A dry refrigerant is crucial because moisture can lead to numerous issues, including freezing and corrosion within the system.

When the sight glass shows blue/green, it confirms that the moisture content is low, which is essential for the efficient operation of the refrigeration system. It helps to ensure that the system functions properly without the risk of damage that moisture can cause. Other conditions such as oversaturation or moisture presence would typically manifest as different colors or cloudiness in the sight glass, indicating potential problems that require attention.