Replacement IDXL2DB1930 Display Board for Hayward Universal HSeries Low Nox Induced Draft Heaters H400FDN and HD150FDN Overview This replacement IDXL2DB1930 display board restores the control panel and status readouts on compatible Low Nox induced draft heater models H400FDN and HD150FDN. It is intended as a directfit service part to a failed or damaged display board and bring the heater back to normal operation. Key benefits Restores functionality: Replaces a malfunctioning display to recover error codes, temperature readouts, and control inputs so the heater can be diagnosed and operated normally. Direct compatibility: Designed for use with H400FDN and HD150FDN models in the Universal HSeries Low Nox induced draft heater line, matching original connector locations and mounting points for straightforward replacement. Reliable electronic design: Built as a printed circuit assembly with preinstalled components to match the electrical connections and signal paths of the original board. Saves time and service costs: Quick replacement reduces downtime compared with more extensive repairs or control system replacements. Easy installation for technicians: Compact form factor and matching connector layout simplify removal of the old board and installation of the unit. What it does Provides the visible display and user interface functions for the heater control system. Receives sensor and control signals from the heater and relays status information for troubleshooting and operation. Replaces a damaged or nonresponsive display board to restore normal communication between the control housing and the heating system. Key attributes Part number: IDXL2DB1930 Function: Display and control board for induced draft heater models listed Compatibility: Fits H400FDN and HD150FDN models in the Universal HSeries Low Nox induced draft heater family Construction: Printed circuit board assembly with mounted electronic components and factoryaligned connectors Form factor: Compact board designed to align with original mounting points and connector positions for a direct replacement Use scenarios Homeowner : a blank or unresponsive control display to restore the heater display and check error codes before calling for service. Field service technician: Carry as a spare part for routine maintenance and rapid replacement during onsite troubleshooting. Seasonal commissioning: Swap in a display board when bringing the heating system back into service after an idle period to confirm full control panel operation. Notes Confirm model compatibility by matching part number and heater model before installation. Installation should be carried out by a qualified technician familiar with gasfired heating equipment and electrical components.