Display control board replacement for Hayward h400fdn and hd150fdn pool heaters. Designed for a direct fit and reliable longterm operation. Key benefits Compatibility assurance: Intended specifically for Hayward h400fdn and hd150fdn models; verify model numbers before to avoid returns. Easy installation: Straightforward swap that saves time and effort without complex tools or special steps. Simple identification: Part number idxl2db1930 is printed for quick confirmation of the correct replacement and to prevent ordering errors. Durable construction: Built from strength materials to withstand regular use and provide consistent performance for pool heater operation. Product highlights Function: Replaces the display and control interface on compatible pool heater models to restore normal operation and user feedback. Fit: Engineered to match mounting points and connectors for the listed models, minimizing modification or adjustment. Materials and durability: Constructed for repeated use and long service life under typical pool heater conditions. Performance: Restores display readout and control responsiveness so the heater can be monitored and adjusted as intended. Typical applications a malfunctioning display board to regain temperature readout and control options after electrical faults or display failure. Install during routine heater maintenance when upgrading worn components to reduce future downtime. Swap out a damaged control panel following water intrusion or impact to restore full user interface functionality. Installation note Designed for an uncomplicated replacement process. Confirm compatibility with Hayward h400fdn or hd150fdn and the part number idxl2db1930 before starting the installation. This control board is a practical replacement part when you need to restore the display and user controls on the specified pool heater models.