Testing Notes

CAUTION: Do not add R-12 refrigerant to an A/C system that requires the use of R-134a refrigerant. Also, do not add R-134a to a system that requires the use of R-12 refrigerant. These two types of refrigerants are not compatible and should never be mixed. Doing so can cause damage to the A/C system.

NOTE: R-12 refrigerant and refrigerant oil is not compatible with R-134a refrigerant and R-134a oil. In an effort to avoid the use of chlorofluorocarbon (CFC) refrigerants that may harm the ozone layer of the atmosphere, Ford Motor Company has introduced the use of a non-CFC-based refrigerant known as R-134a. This refrigerant has many of the same properties of R-12 and is similar in form and function. However, R-134a refrigerant is a hydrofluorocarbon (HFC)-based refrigerant. Because of the absence of chlorine in its molecular structure, R-134a is not considered an ozone-depleting substance.

REFRIGERANT IDENTIFICATION AND ANALYSIS
Use the A/C refrigerant analyzer 198-00001, or equivalent, to identify the refrigerant type and purity. Refer to the manufacturer's operating instructions.
^ If the purity percentage of the R-134a or R-12 is 98% or greater by weight, a green "PASS" LED will light. Proceed with the refrigerant recovery.
^ If the R-134a or R-12 does not meet 98% purity, a red "FAIL" LED will light. Proceed with the refrigerant recovery.
^ Levels of R-22 and flammable HYDROCARBON'S above 2% will light the red "FAIL" LED. Refer to Recovery of Contaminated A/C Systems in the Service Procedures.
^ If a flammable HYDROCARBON is detected above 5%, both the "FAIL" and "HYDROCARBON" LED's will light and a horn will sound. Refer to Recovery of Contaminated A/C Systems in the Service Procedures.