Replacement LXi/JXi Heater Ignition Module, R0456900 Overview This replacement ignition module, part number R0456900, is a directfit natural gas ignition control for LXi and JXi low NOx pool and spa heaters. It is designed for use with specific heater models and restores the electronic ignition function when the original control fails. Key benefits Restores ignition control function for affected heater models, eliminating unreliable starts or nostart conditions. Direct replacement part number R0456900 for straightforward installation and compatibility with specified models. Built to match the original ignition control interface and mounting points for service convenience. Features and important attributes Function: Natural gas ignition control module for LXi and JXi low NOx pool and spa heaters. Compatibility: Fits models 200, 260, 400 JXi and LXi low NOx heaters and is used in LXI250, LXI300, LXI400 models. Form factor: Designed as a direct replacement module to work with existing heater wiring and mounting; verify fit before installation. Performance: Provides the electronic control needed to initiate and monitor burner ignition for the compatible heater models. Installation and safety note Disconnect the appliance from power and shut off the water supply before servicing to ensure safe installation. Follow the heater manufacturer service procedures and wiring diagrams when replacing the ignition module. If unsure about installation, consult a qualified service technician. Typical use scenarios a failed ignition control module on a pool heater that will not ignite or has intermittent ignition problems. Keep on hand as a spare part for maintenance technicians servicing LXi and JXi low NOx pool and spa heaters. Install during heater refurbishment to restore reliable electronic ignition after component age or electrical fault. Compatibility checklist Confirm the heater model and part number before ordering. This module is intended for models 200, 260, 400 JXi and LXi low NOx pool and spa heaters and is used in LXI250, LXI300, LXI400 units. This replacement ignition module is supplied as a service part to match the original control used in the listed heater models.