{"product_id":"hayward-heat-exchanger-assembly-h400fd-fdxlhxa1400","title":"Hayward Heat Exchanger Assembly-H400FD | FDXLHXA1400","description":"\u003ch2\u003e\u003cspan\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHayward Heat Exchanger Assembly for H400FD | FDXLHXA1400\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a genuine Hayward replacement heat exchanger designed for compatible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHayward H400FD Universal H-Series Low NOx pool and spa heaters\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. As one of the heater’s most important internal components, the heat exchanger transfers heat from the burner system into the pool or spa water, helping restore proper heater performance and consistent water temperature.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis replacement assembly is ideal for heater repair jobs where the original heat exchanger is leaking, corroded, damaged, or no longer heating efficiently. Designed specifically for the H400FD heater platform, this OEM Hayward part helps maintain proper fit, reliable operation, and factory-style performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eProfessional installation is strongly recommended due to the gas, water, and electrical components involved in heater service.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIdeal For\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eReplacing a damaged, leaking, or corroded H400FD heat exchanger\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRestoring heat transfer performance in compatible Hayward heaters\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePool and spa heater service repairs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eH400FD Universal H-Series Low NOx heater maintenance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCustomers searching by Hayward part number FDXLHXA1400\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProfessional pool equipment technicians and service companies\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIn-ground pool and spa systems using compatible Hayward H-Series heaters\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHayward\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePart Number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFDXLHXA1400\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSKU\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFDXLHXA1400\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eUPC \/ Barcode\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e610377073752\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHeat Exchanger Assembly\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCompatible Heater Model\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHayward H400FD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHeater Series\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUniversal H-Series Low NOx \/ Forced Draft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHeater Application\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePool and spa \/ hot tub heater repair\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHeater Size\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e400,000 BTU model\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePlumbing Connections\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2\" x 2.5\" CPVC union connections\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApproximately 48.5 lb\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApproximately 37.5\" x 8.5\" x 17.5\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInstallation Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eProfessional installation recommended\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSold As\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eComplete heat exchanger assembly\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eManufacturer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHayward Pool Products\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eGenuine Hayward Replacement Part\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eManufactured by Hayward for proper compatibility with the H400FD Universal H-Series Low NOx heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDesigned for H400FD Heaters\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eMade specifically for compatible Hayward H400FD pool and spa heater applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eRestores Heater Performance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHelps restore proper heat transfer so the heater can warm pool or spa water efficiently.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eComplete Heat Exchanger Assembly\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplacement assembly for the heater’s internal heat transfer system.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHigh-Flow Heating Design\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned to support efficient water movement through the heat exchanger for reliable heating performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCPVC Union Plumbing Connections\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFeatures 2\" x 2.5\" CPVC union-style plumbing connections for compatible heater installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProfessional Repair Solution\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIdeal for service technicians replacing a failed or damaged heat exchanger in the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eBenefits\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eHelps Restore Consistent Water Temperature\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA properly functioning heat exchanger allows the heater to transfer heat efficiently into the pool or spa water.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eExtends the Life of Compatible Heaters\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReplacing a failed heat exchanger can help keep an otherwise serviceable H400FD heater operating.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eReduces Heating Problems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCan help correct heater issues related to leaking, corrosion, poor heat transfer, or internal heat exchanger damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eOEM Fit and Reliability\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUsing a genuine Hayward replacement part helps ensure proper fitment and compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIdeal for High-Demand Pool and Spa Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBuilt for the 400,000 BTU H400FD heater model commonly used on larger pools, spas, and combination pool\/spa systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCustomer-Facing Q\u0026amp;A\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eQ: What is the Hayward FDXLHXA1400 used for?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: The Hayward FDXLHXA1400 is a replacement heat exchanger assembly for compatible Hayward H400FD Universal H-Series Low NOx pool and spa heaters.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: What is the SKU for this product?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: The SKU is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFDXLHXA1400\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: What is the UPC \/ barcode?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: The UPC \/ barcode is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e610377073752\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Is this a complete pool heater?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: No. This is a replacement heat exchanger assembly only. It is not a complete heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Which heater does this fit?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: This part is designed for the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHayward H400FD Universal H-Series Low NOx heater\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Always confirm your heater model number before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Will this fit H250FD, H300FD, or H350FD heaters?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: No. This listing is for the H400FD heat exchanger assembly. Other heater sizes typically require different heat exchanger assemblies.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: When should a heat exchanger be replaced?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: A heat exchanger may need replacement if it is leaking, corroded, cracked, damaged from poor water chemistry, or no longer transferring heat properly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: Can a homeowner install this part?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: Professional installation is recommended. Heater repairs may involve gas, water, electrical, venting, and safety controls.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eQ: What should be checked before installation?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA: Confirm the heater model number, inspect the burner system, check for water chemistry damage, verify plumbing condition, and ensure all safety controls are operating correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eTurn off gas, power, and water flow before servicing the heater.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eConfirm the heater model is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eH400FD\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e before ordering or installing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInspect the heater cabinet, burner tray, headers, sensors, wiring, and plumbing unions during repair.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck pool water chemistry history, as poor water balance can damage heat exchangers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReplace damaged seals, gaskets, or related hardware as needed.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInstallation should be completed by a qualified pool heater technician.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAfter installation, test for leaks, proper ignition, safe operation, and correct water flow.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":52762695434550,"sku":"FDXLHXA1400","price":1899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/1167\/9798\/files\/HPPFDXLHXA1400_0.jpg?v=1755535164","url":"https:\/\/poolsupplydepot.net\/products\/hayward-heat-exchanger-assembly-h400fd-fdxlhxa1400","provider":"Pool Supply Depot","version":"1.0","type":"link"}