4 Seasons HVAC Pressure Switch For 1989-2001 Mack RB

1989 Mack RB OE No. 4379RD546460; 4379RD559761;. 1990 Mack RB OE No. 4379RD546460; 4379RD559761; OE No. 4379RD559760; 4379RD559761;. Part Type: HVAC Pressure Switch. 1991 Mack RB OE No. 4379RD546460; 4379RD559761; OE No. 4379RD559760; 4379RD559761;.