Reusing Refrigerant After the Black Death?


Joined
Oct 30, 2025
Messages
5
Points
1
City
Cincinnati
State - Country
OH - USA
Other
1990 Mazda Miata
Vehicle Year
2002
Vehicle
Ford Ranger
Drive
4WD
Engine
4.0 V6
Transmission
Automatic
Howdy folks,

AC blowing hot as summer begins rearing its ugly head. I had a local mechanic vacuum out the refrigerant (r134a) so I could investigate, and I discovered the black death had struck. I will be replacing everything I need to but I have one concern: The mechanic said it will be fine to put the old refrigerant back into the system once I get everything replaced, but I don't want all my work to be for nothing by putting contaminated refrigerant into the new clean system. Would a proper AC vacuum pump system at a mechanic be able to filter out the contaminants caused by the black death, or should I just put fresh refrigerant in?
 
most ac recovery systems have filtration on them already
 
What's the black death?
 

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