Underhood A/C Specification Labels
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Most R-134a based systems will be identified through the use of underhood labels, or with R-134a refrigerant clearly printed on labels. See Fig 1 and Fig 2 . Labels may be located on underside of hood, compressor, firewall and/or strut supports. The underhood label used on Ford Motor Co. vehicles is Yellow. Before servicing an A/C system, always determine which refrigerant is being used.