[Compatibility] Fits low Nox induced draft heater models: W3H150FDN, W3H150FDP, W3H200FDN, W3H200FDP, W3H250FDN, W3H250FDP, W3H400FDN, W3H400FDP, H400FDNASME, H250FDNASME, H400FDPASME, H250FDPASME, H250FDN, H350FDN, H400FDN, H250FDP, H350FDP, H400FDP, H150FDN, H200FDN, H300FDN, H150FDP, H200FDP, H300FDP, H500FDP, H500FDN, H500FDNASME, H500FDPASME. [Installation] Ensure power and gas are off before replacing. Disconnect old wires, install the new board, and reconnect wires. [Durability] Made with upgraded materials for resistance to salt water and chemicals, ensuring longer lifespan. [Efficiency] Optimized for faster pool heating, reducing wait time. Type: Display Board Replacement Fitment: - H350FDP - Universal H-Series Low Nox Induced Draft Heater Models: H250IDL2, H350IDL2, H400IDL2 Note: - Professional installation recommended. - Verify compatibility before purchase. - Product may vary slightly in appearance due to updates or batches. Color: As shown Material: PCB Package Contents: 1 x Display Board Note: Slight color or size variations may occur due to lighting or manufacturing tolerances.