Sight Glass Indicator: Notes
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NOTE:
Sight glass indicator conditions listed are for R-12 systems. Information for R-134a systems is not available from manufacturer.
Not all systems use a sight glass. If used, a sight glass may be mounted in receiver-drier (accumulator) or in discharge line. Refrigerant's condition can be visually checked while passing through sight glass. The following are possible conditions of sight glass indicator, which may help in the diagnosis of problems. See Figure .
NOTE:
Sight glass readings are not positive identification of a problem. Readings should be relied upon only when other system symptoms exist.