{"product_id":"hayward_fdxlhxa1400","title":"Hayward Heat Exchanger Assembly for Universal H-Series Gas Heater H400FD | FDXLHXA1400","description":"\u003cp\u003eThe Hayward Heat Exchanger Assembly (FDXLHXA1400) is the OEM replacement heat exchanger for the Universal H-Series H400FD gas heater, restoring the heater's core thermal transfer function with a factory-original component.\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0; color: #856404;\"\u003e\u003cstrong\u003eIMPORTANT: PROFESSIONAL SERVICE REQUIRED\u003c\/strong\u003e\u003cbr\u003eGas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.\u003c\/p\u003e\n\n\u003cp\u003eThe heat exchanger is the primary thermal transfer component in the H400FD heater, circulating pool water through cupro nickel tubing where heat generated by the burner assembly is transferred to the water. Hayward's cupro nickel construction provides resistance to salt water and chemical corrosion, making this assembly suitable for both chlorine and salt water pool applications. The \"totally managed\" water flow design optimises contact time between pool water and the heat source for efficient energy transfer at the H400FD's 400,000 BTU output rating.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eHayward Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eFDXLHXA1400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Heater Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eH400FD (Universal H-Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eConstruction Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eCupro nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e610377073752\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore installing the new heat exchanger, flush the heater's water circuit to clear any scale or debris that may have contributed to the original failure. Inspect the header gaskets and any associated O-rings at the same time — replacing worn seals during this service interval avoids having to re-open the heater shortly after. Because this is an internal gas appliance component, all installation and commissioning must be performed by a licensed pool professional or qualified HVAC technician.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-06-18 --\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":54303470125331,"sku":"FDXLHXA1400","price":1697.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/HPPFDXLHXA1400_0.jpg?v=1781649663","url":"https:\/\/poolaroo.com\/products\/hayward_fdxlhxa1400","provider":"Poolaroo","version":"1.0","type":"link"}