White-Rodgers Furnace Controls White-Rodgers universal controls are designed to help you get more jobs done in one truck roll, increasing productivity and profitability. SKU 21M51U-843 Product Details | Specifications | Check Inventory Please select UNIVERSAL 2 STAGE CONT BOARDUNIV 2-STAGE VS CONTROL BOARDCONTROL BOARD RPLC YORK/LXAIREALL SPARK UNVRSL IGNTN CONTROLUNIVERSAL FURNACE CNTRL BOARD Log in to view price