Can I Mix R12 And 134a? Can I mix R12 and 134a? Mixing R12 and R-134a refrigerants is illegal, and even if you previously bleed out the R12, the system has to be adjusted to use R-134a, or it will cause leaks, copper corrosion, and lack the lubrication required for optimal operation. Is R12 compatible
Does 609 Certification Expire? Does 609 certification expire? Do technicians who already have a 609 Certification need to be re-certified? If a technician was certified anytime since 1991, there is no required re-certification. Their certification is good for life. How long is the EPA 608 certification good for? Section 608 Technician Certification credentials do not