Hayward H-Series FD Heater Ignitor Kit | FDXLIGN1930Hayward FDXLIGN1930 Igniter Assembly Universal H Series Low NOx Heater Part # FDXLIGN1930 the replacement igniter assembly for Hayward Universal H Series Low NOx pool and spa heaters. This component restores reliable ignition and burner startup when the original igniter has failed or become defective. Key Features High quality igniter designed for use in H Series heaters to ensure consistent spark and ignition timing. Compatible with factory wiring