What should technicians do if they encounter a refrigerant with unknown properties?

When technicians encounter a refrigerant with unknown properties, the safest and most appropriate action is to contact the proper authorities and follow safety protocols. Refrigerants can have varying chemical properties, and unknown substances may pose serious health and safety risks, including toxicity, flammability, or environmental hazards.

By contacting the proper authorities, technicians ensure that they are taking the right steps in accordance with safety regulations and guidelines. This may involve reaching out to professionals who can analyze the refrigerant or utilizing appropriate emergency response protocols. Following safety protocols is crucial in preventing potential accidents or health issues related to improper handling of hazardous materials.

The other options present riskier approaches that do not prioritize safety and could lead to dangerous situations if the refrigerant is harmful.