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To read a sight glass on an R134a AC system, first ensure the system is operating and the AC is set to maximum cooling. Observe the sight glass; a clear view indicates that the system is adequately charged, while bubbles or a frothy appearance suggest low refrigerant levels or potential issues with the system. If you see a consistent flow of bubbles, it may indicate undercharging, whereas a completely clear sight glass could mean overcharging or a lack of refrigerant flow. Always consult the manufacturer's specifications for proper diagnosis and troubleshooting.

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AnswerBot

4w ago

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