The Hayward H-Series Heater Display Board Only (IDXL2DB1930) is a replacement circuit board specifically designed for the display unit of Hayward H-Series pool and spa heaters.  

Key Features:

• Genuine Hayward Part: This ensures proper compatibility and reliable performance with your Hayward H-Series heater.
• Display Functionality: It is the main component responsible for showing the heater's settings, temperature readings, diagnostic codes, and other operational information.
• Direct Replacement: Designed to directly replace a faulty or damaged display board with the same part number (IDXL2DB1930).
• Compatibility: Based on search results, this display board is compatible with various Hayward H-Series Low NOx induced draft heater models, including:
  • H250IDL2
  • H350IDL2  
  • H400IDL2  
  • H350FDP (and potentially other FDP models like H200FDP, H300FDP, H400FDP)  
  • And potentially other Universal H-Series models.
• Facilitates Troubleshooting: A functioning display board is crucial for diagnosing issues with the heater as it presents error codes.  

Purpose:

The primary purpose of this display board is to allow users to:

• Monitor the current status and temperature of their pool or spa heater.
• Adjust the desired temperature settings.
• View any error codes that may appear, aiding in troubleshooting and repair.

If your Hayward H-Series heater's display is not functioning correctly (e.g., blank screen, garbled information, unresponsive buttons), replacing the display board with this genuine part (IDXL2DB1930) could resolve the issue.

Important Considerations:

• Installation: While some users might attempt DIY replacement, it's generally recommended to have this part installed by a qualified pool technician, especially if you are not comfortable with electrical work. Incorrect installation can lead to further damage or safety hazards.
• Troubleshooting: Before replacing the display board, it's wise to check other potential causes for a non-functioning display, such as power issues or loose connections.
• Model Verification: Always double-check your specific Hayward H-Series heater model number to ensure this display board (IDXL2DB1930) is the correct replacement part.