The Raypak PCB circuit board is designed for compatible 55A, 105A, 155A, and 185A IID heater applications where the supported electronic control board needs replacement. A circuit board is useful because it serves as a central control component for supported electrical and ignition-related functions inside the heater.This replacement is especially useful when the original board is failed, heat-damaged, erratic, or no longer dependable. Matching the correct IID board helps preserve intended control-system compatibility and supports cleaner repair results.The 005086B is a practical service part when a compatible Raypak heater needs a PCB circuit board to restore dependable electronic control support. Raypak PCB circuit board Designed for compatible IID heater applications Supports 55A, 105A, 155A, and 185A models Useful when the original board is failed or erratic Helps restore cleaner and more dependable heater control