This is the main control panel on the front of your heater that displays a digital readout. From this bezel and keypad you can control the temperature outputs and modes for your heater.  If your heater model number ends with an FDN or FDP this assembly will work.

The Hayward FDXLBKP1930 Bezel and Keypad Assembly fits Hayward H-Series FD heaters that have a model number ending in FDN or FDP. This part is only the keypad and the bezel and does not have the display circuit board attached. It has a ribbon connector that connects to the display board. Hayward has changed the look slightly; the buttons are a different shape and it no longer has "H-Series" printed in the upper corner.