What does a bluish flame turning green indicate when using a halide leak detector?

A bluish flame turning green when using a halide leak detector indicates the presence of halogenated refrigerants, which are often used in HVAC systems. The halide leak detector operates by heating a small amount of halide material. When exposed to halogenated refrigerants, the material undergoes a chemical reaction that produces a colored flame. The bluish flame turning green specifically signifies that the detector has identified a refrigerant leak, making it a crucial indicator for technicians to identify leaks in refrigeration systems.

Understanding this reaction is essential for HVAC professionals, as it allows them to take immediate action to address leaks, which can be detrimental not only to system efficiency but also to environmental safety. Other options such as a faulty gauge, low battery, or excessive pressure do not produce this specific flame color change in a halide leak detector, as they would indicate other issues unrelated to the detection of refrigerants.