Hayward FDXLICB1930 FD Integrated Control Board Replacement Kit for Select Hayward H-Series Pool Heater Fd integrated control board kit Fits hayward universal h-series low nox pool heater models h250fdn, h250fdp Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp