LiftMaster Logic Board Assembly (FDO, LMPLC, 500 CHIP) | LIF-K79-13493B-500

LiftMaster Logic Board Assembly (FDO, LMPLC, 500 CHIP) | LIF-K79-13493B-500

This is a Logic Control Board Assembly (FDO, FCC, LMPLC, 500V CHIP) Replacement Kit for use with various LiftMaster® Commercial Door Operator Models. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility.

Genuine LiftMaster® replacement part.

OEM FDO/FDC Logic Board Replacement with 500V Chip Upgrade

The LiftMaster K79-13493B-500 is the factory replacement for Fire Door (FDO), Fire Door Control (FDC), and LMPLC commercial operators. It replaces the discontinued K79-13493-1 and K79-13493-500 with an upgraded 500V logic chip designed to withstand electrical noise and voltage fluctuations in industrial environments.

Ships pre-loaded with the latest firmware for interlocks, smoke detector connections, and monitored entrapment protection (LMEP). Its plug-and-play bolt-on design fits existing electrical boxes using the same standoffs and J-terminal wiring harness mapping. Supports MyQ technology for cloud monitoring when paired with the 828LM Internet Gateway.

Resolve Error 8 and Voltage-Related Logic Failures

The most common failure in older boards is Error 8 (8 LED flashes), indicating a processor or memory failure from voltage irregularities. The 500V chip directly addresses this, preventing the "phantom operation" and "memory loss" issues that plagued earlier boards.

Note: this board is specifically for FDO/FDC/LMPLC units, not standard Trolley (T) or Jackshaft (J) operators (those use K001D8395). Browse the full LiftMaster collection or explore all Gate Openers and Operators for compatible equipment.