Which color indicates moisture present in the sight glass of a refrigerant system?

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Multiple Choice

Which color indicates moisture present in the sight glass of a refrigerant system?

Explanation:
Moisture indicators in the sight glass are designed to show when water is present in the refrigerant. In this setup, the indicator changes to yellow when moisture is detected, signaling the system is not dry. A blue color means the refrigerant is dry. Seeing yellow means you need to evacuate the system to remove moisture and then recharge with refrigerant (and check the dryer) because moisture can form acids, promote corrosion, and freeze in metering devices, jeopardizing performance and reliability.

Moisture indicators in the sight glass are designed to show when water is present in the refrigerant. In this setup, the indicator changes to yellow when moisture is detected, signaling the system is not dry. A blue color means the refrigerant is dry. Seeing yellow means you need to evacuate the system to remove moisture and then recharge with refrigerant (and check the dryer) because moisture can form acids, promote corrosion, and freeze in metering devices, jeopardizing performance and reliability.

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