The LiftMaster 10-30739NM FDO, E-BOX, COVER, LH is a genuine OEM replacement enclosure cover for the left-hand electrical/control box on LiftMaster FDO Series commercial fire door operators. Designed to shield the operator’s internal controls and wiring from dust and incidental contact, this left-hand E-BOX cover helps maintain proper enclosure integrity and supports safe, reliable operation in demanding commercial and industrial environments. It’s ideal for service technicians and facility managers needing a direct-replacement control box cover to restore damaged or missing panels on FDO operators used with rolling or sectional fire doors.
This part is specific to left-hand configurations and is not universal; verify hand and operator series before ordering by referencing the operator’s model/serial tag and LiftMaster parts diagrams. As a non-electrical service part, it requires no programming. For installation, disconnect power and follow lockout/tagout procedures, then align and secure the cover using the appropriate factory hardware per the operator’s service manual. Common search terms include LiftMaster FDO E-BOX cover left hand, control box cover, enclosure cover, OEM replacement, commercial fire door operator part, and 10-30739NM.