{"product_id":"hayward_fdxlhxa1300","title":"Hayward Heat Exchanger Assembly for Universal H-Series H300FD Heater | FDXLHXA1300","description":"\u003cp\u003eThe Hayward Heat Exchanger Assembly (FDXLHXA1300) is the OEM replacement heat exchanger assembly for the Universal H-Series H300FD pool and spa heater.\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 assembly is the core thermal transfer component of the H300FD heater, responsible for transferring combustion heat to the pool water circulating through the unit. Hayward's Universal H-Series heat exchangers are constructed with cupro nickel, providing resistance to salt water and chemical corrosion in demanding pool and spa environments.\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;\"\u003eFDXLHXA1300\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;\"\u003eH300FD (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\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e610377104579\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eWhen replacing the heat exchanger assembly on an H300FD, have a licensed pool professional inspect all adjacent seals, headers, and manifold connections before reinstallation. Heater components operate under thermal cycling stress — replacing worn companion components at the same service visit reduces the likelihood of a repeat service call.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-06-18 --\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":54303479202067,"sku":"FDXLHXA1300","price":1815.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/hayward-heat-exchanger-assembly-for-universal-h-series-h300fd-heater-fdxlhxa1300-4.webp?v=1787556838","url":"https:\/\/poolaroo.com\/products\/hayward_fdxlhxa1300","provider":"Poolaroo","version":"1.0","type":"link"}