Compressor HVAC: Service Precautions

Important
- R-12 refrigerant and R-134a refrigerant must never be mixed, even in the smallest of amounts. They are incompatible with each other. If the refrigerants are mixed, compressor failure is likely to occur.

- Use only specified lubricant, Polyalkaline Glycol (PAG) for the R-134a A/C system and R-134a components. If lubricants other than those specified are used, compressor failure is likely to occur. All fittings and O-ring seals should be coated with clean 525 viscosity refrigerant oil to provide a leak-proof seal and to aid in assembly and disassembly.