Underhood A/C Specification Labels
Most R-134a based systems will be identified through the use of underhood labels with R-134a refrigerant clearly printed on labels. (Scheme 1) The underhood label used on Ford Motor Co. vehicles is Yellow. (Scheme 2) Most manufacturers will identify refrigerant type with labels affixed to compressor. Before servicing an A/C system, always determine which refrigerant is being used.
