The LiftMaster K001D8398 Power Board Kit (1PH, N4, L5) is a genuine OEM replacement power board designed for LiftMaster Logic 5.0 commercial door operators configured as single‑phase units in NEMA 4 enclosures. This board restores proper power distribution and low‑voltage supply to the system’s logic/control electronics while supporting connected safety devices and accessories commonly used on industrial and commercial overhead door openers. Its N4 designation aligns with NEMA 4 operator assemblies, making it suitable for wet or outdoor environments when installed as part of the factory‑sealed enclosure.
Intended as a replacement part or upgrade within the Logic 5.0 platform, this kit helps resolve issues related to power delivery, control stability, or board failures without replacing the entire operator. For compatibility, verify your operator is a LiftMaster L5 (Logic 5.0) single‑phase model in a NEMA 4 housing and match this part number against the existing board or the operator’s parts diagram. Installation should be performed by a qualified technician: disconnect power before service, follow ESD‑safe handling, transfer wiring harnesses one‑for‑one, and confirm all seals and gaskets are correctly reinstalled to maintain the enclosure rating. After replacement, recheck operator settings as needed and test all monitored entrapment protection devices in accordance with UL 325. Common search terms include LiftMaster K001D8398, Logic 5.0 power board, NEMA 4 single‑phase operator board, commercial door operator replacement part, and OEM power board kit.