4 Seasons HVAC Pressure Switch For 1990-1998 Mack FDM

1990 Mack FDM OE No. 4379RD546460; 4379RD559761; OE No. 4379RD559760; 4379RD559761;. 1991 Mack FDM OE No. 4379RD546460; 4379RD559761; OE No. 4379RD559760; 4379RD559761;. 1992 Mack FDM OE No. 4379RD546460; 4379RD559761; OE No. 4379RD559760; 4379RD559761;.