[Compatibility] Display board fit for Hayward 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, and H500FDPASME. [Simple Installation] The key to fixing the low Nox induced draft heater model is to be sure power and gas are turned off. Then you need to know where wires are attached, undo old wires, then replace board and hook wires back to board. [Wear Resistance] With upgraded materials and special processing technology, the display board replacement has good corrosion resistance to salt water and chemicals to ensure longer service life. [Improved Heating Efficiency] The pool heating circuit board can heat your swimming pool faster after our optimized processing, so that you can spend less time waiting and can enjoy your pleasant time quickly. Type:Display Board Replacement Fitment: For Hayward H350FDP For Hayward Universal H-Series Low Nox Induced Draft Heater Models H250IDL2 H350IDL2 H400IDL2 Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:As Shown Material:PCB Package Contents: 1 * Display Board