{"product_id":"hayward-heater-thermistor-fdxlter1930","title":"Hayward Heater Thermistor FDXLTER1930 – Universal H-Series Low NOx Heaters","description":"\u003cdiv class=\"ups-product-desc\" style=\"max-width: 100%; color: #1f2937; line-height: 1.7;\"\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv style=\"background: linear-gradient(135deg,#0f4c81 0%,#1273b8 100%); color: #fff; border-radius: 18px; padding: 24px 20px; margin: 0 0 24px;\"\u003e\n\u003cdiv style=\"font-size: 13px; text-transform: uppercase; opacity: .9; margin-bottom: 8px;\"\u003ePool Heater Replacement Temperature Sensor\u003c\/div\u003e\n\u003ch2 style=\"margin: 0 0 10px; font-size: 30px; color: #fff;\"\u003eHayward Heater Thermistor\u003c\/h2\u003e\n\u003cp style=\"margin: 0; font-size: 16px; color: #fff;\"\u003eGenuine Hayward replacement temperature sensor for compatible Universal H-Series Low NOx Forced Draft, ASME and H135 pool heaters manufactured through December 2020. Designed to monitor heater water temperature and support proper temperature control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WARRANTY --\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 14px; padding: 16px; margin-bottom: 28px;\"\u003e\n\u003ch3 style=\"margin: 0 0 8px; font-size: 22px; color: #1e3a8a;\"\u003eWarranty Information\u003c\/h3\u003e\n\u003cp style=\"margin: 0; font-size: 16px;\"\u003e\u003cstrong\u003e1-Year Manufacturer Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 6px 0 0; font-size: 14px; color: #475569;\"\u003eUltimate Pools is your first point of contact for compatibility verification, installation guidance, and warranty support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- INTRO --\u003e\n\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eHayward Heater Thermistor (FDXLTER1930)\u003c\/strong\u003e is a genuine Hayward replacement temperature sensor designed for compatible Universal H-Series Low NOx pool and spa heaters. The thermistor monitors water temperature and communicates temperature information to the heater's control system, supporting temperature regulation during heater operation.\u003c\/p\u003e\n\u003cp\u003eDesigned for select Hayward Forced Draft, ASME and H135 heater models, this replacement thermistor is specified for compatible residential and commercial heaters \u003cstrong\u003emanufactured through December 2020\u003c\/strong\u003e. It is used when servicing a damaged or malfunctioning heater temperature sensor. Manufacturing date verification is essential because Hayward identifies FDXLTER1931 for residential heaters manufactured January 2021 onward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FEATURES --\u003e\n\u003cdiv style=\"margin-bottom: 32px;\"\u003e\n\u003ch3 style=\"font-size: 26px; margin: 0 0 18px; color: #0f172a;\"\u003eKey Features\u003c\/h3\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 12px;\"\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eGenuine Hayward Replacement Part\u003c\/strong\u003e\u003cbr\u003eOriginal Hayward thermistor designed for specified H-Series pool heater applications.\u003c\/div\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eWater Temperature Monitoring\u003c\/strong\u003e\u003cbr\u003eMeasures heater water temperature for use by the heater's electronic control system.\u003c\/div\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eSupports Heater Temperature Control\u003c\/strong\u003e\u003cbr\u003eProvides temperature information used by compatible heater controls to regulate heating operation.\u003c\/div\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eUniversal H-Series Compatibility\u003c\/strong\u003e\u003cbr\u003eDesigned for select Hayward Universal H-Series Low NOx Forced Draft heater models.\u003c\/div\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eResidential \u0026amp; Commercial Applications\u003c\/strong\u003e\u003cbr\u003eSpecified for compatible residential and commercial heater models manufactured through December 2020.\u003c\/div\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 16px;\"\u003e\n\u003cstrong\u003eHeater Service Replacement\u003c\/strong\u003e\u003cbr\u003eSuitable for replacing a faulty original thermistor after diagnosis by a licensed HVAC contractor.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- COMPATIBILITY --\u003e\n\u003cdiv style=\"margin-bottom: 32px;\"\u003e\n\u003ch3 style=\"font-size: 26px; margin: 0 0 16px; color: #0f172a;\"\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 18px;\"\u003e\n\u003cp style=\"margin: 0 0 14px;\"\u003eCompatible with the following Hayward pool and spa heater models, subject to the manufacturing date requirements outlined below:\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eHayward Universal H-Series Forced Draft \/ Low NOx Heaters:\u003c\/strong\u003e H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHayward Universal H-Series ASME Forced Draft Heaters:\u003c\/strong\u003e H250FDNASME, H250FDPASME, H400FDNASME, H400FDPASME.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHayward H-Series H135 Above-Ground Pool Heaters:\u003c\/strong\u003e H135ID1.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin: 16px 0 8px;\"\u003e\u003cstrong\u003eImportant Manufacturing Date Requirements:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFDXLTER1930:\u003c\/strong\u003e Specified for compatible residential and commercial heaters manufactured December 2020 and earlier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFDXLTER1931:\u003c\/strong\u003e Specified for compatible residential heaters manufactured January 2021 and later.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHayward HDF Heaters:\u003c\/strong\u003e FDXLTER1931 is identified as the only compatible thermistor for HDF heaters. Do not order FDXLTER1930 for an HDF heater.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin: 16px 0 0; font-size: 14px; color: #475569;\"\u003eCompatibility may vary by production year, configuration and installation. Verify your exact model and part number before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- APPLICATIONS --\u003e\n\u003cdiv style=\"margin-bottom: 32px;\"\u003e\n\u003ch3 style=\"font-size: 26px; margin: 0 0 16px; color: #0f172a;\"\u003eApplications\u003c\/h3\u003e\n\u003cdiv style=\"background: #f8fafc; border: 1px solid #dbeafe; border-radius: 14px; padding: 18px;\"\u003e\n\u003cul style=\"margin: 0; padding-left: 20px;\"\u003e\n\u003cli\u003eReplacement of faulty Hayward pool heater temperature sensors\u003c\/li\u003e\n\u003cli\u003eHayward Universal H-Series Low NOx Forced Draft heater servicing\u003c\/li\u003e\n\u003cli\u003eTemperature sensor replacement on compatible ASME commercial heaters\u003c\/li\u003e\n\u003cli\u003eMaintenance of compatible Hayward H135 above-ground pool heaters\u003c\/li\u003e\n\u003cli\u003ePool and spa heater temperature control system repairs\u003c\/li\u003e\n\u003cli\u003eHeater troubleshooting and thermistor replacement following professional diagnosis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin: 16px 0 0; font-size: 14px; color: #475569;\"\u003eConfirm the heater's manufacturing date before ordering. FDXLTER1930 is specified for compatible heaters manufactured through December 2020; later residential models and HDF heaters require verification of FDXLTER1931 instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- INSTALLATION --\u003e\n\u003cdiv style=\"background: #fff7ed; border: 1px solid #fdba74; border-radius: 14px; padding: 18px; margin-bottom: 32px;\"\u003e\n\u003ch3 style=\"margin: 0 0 10px; font-size: 22px; color: #9a3412;\"\u003eProfessional Installation Recommended\u003c\/h3\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eAll service on gas appliances shall be performed by a licensed HVAC contractor.\u003c\/strong\u003e Thermistor diagnosis, replacement and heater servicing must follow Hayward's manufacturer instructions and all applicable electrical, plumbing, gas, bonding and building codes.\u003c\/p\u003e\n\u003cp style=\"margin: 12px 0 0;\"\u003eBefore replacement, the licensed contractor should verify the heater model, manufacturing date and original thermistor part number. The heater must be safely shut down and isolated as required by the manufacturer before servicing. Proper sensor operation and heater safety functions should be verified before returning the unit to service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS --\u003e\n\u003cdiv style=\"margin-bottom: 28px;\"\u003e\n\u003ch3 style=\"font-size: 24px; margin: 0 0 16px; color: #0f172a;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; border: 1px solid #e5e7eb; border-radius: 14px;\"\u003e\n\u003ctable style=\"width: 100%; min-width: 520px; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eFDXLTER1930\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eHayward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003ePool Heater Thermistor \/ Temperature Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eUniversal H-Series Low NOx, ASME Forced Draft and H135\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eWater Temperature Monitoring for Heater Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eSelect Hayward Universal H-Series Forced Draft H150FD–H400FD, H250FD\/H400FD ASME and H135ID1 heater models manufactured through December 2020. See Compatibility \u0026amp; Fitment for exact models and restrictions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eManufacturing Date Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eDecember 2020 and Earlier, for Compatible Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eLater Residential Heater Part\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eFDXLTER1931 – January 2021 and Later\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eHDF Heater Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eNot Compatible – FDXLTER1931 Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003ePool and Spa Heater Temperature Sensor Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003eLicensed HVAC Contractor Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"\u003e1-Year Manufacturer Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\u003cstrong\u003eFinal Sale\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ --\u003e\n\u003cdiv\u003e\n\u003ch3 style=\"font-size: 26px; margin: 0 0 16px; color: #0f172a;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"background: #ffffff; border: 1px solid #e5e7eb; border-radius: 14px; overflow: hidden;\"\u003e\n\u003cdiv style=\"padding: 16px; border-bottom: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eWhat does the Hayward FDXLTER1930 thermistor do?\u003c\/strong\u003e\u003cbr\u003eThe FDXLTER1930 monitors water temperature inside compatible Hayward pool heaters and provides temperature information to the heater control system. This information is used to regulate heater operation.\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px; border-bottom: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eWhich Hayward pool heaters are compatible with FDXLTER1930?\u003c\/strong\u003e\u003cbr\u003eThis thermistor is specified for select Hayward Universal H-Series Forced Draft, ASME and H135 heaters manufactured through December 2020. Refer to the Compatibility \u0026amp; Fitment section for the exact model numbers and manufacturing date requirements.\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px; border-bottom: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eWhat is the difference between FDXLTER1930 and FDXLTER1931?\u003c\/strong\u003e\u003cbr\u003eFDXLTER1930 is specified for compatible residential and commercial heaters manufactured December 2020 and earlier. FDXLTER1931 is specified for residential heaters manufactured January 2021 onward and is the only thermistor identified for Hayward HDF heaters. Always confirm the heater model and manufacturing date before ordering.\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px; border-bottom: 1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eCan I replace the heater thermistor myself?\u003c\/strong\u003e\u003cbr\u003eNo. All service on gas appliances shall be performed by a licensed HVAC contractor. A qualified contractor should diagnose the heater, confirm the correct thermistor and complete the replacement in accordance with Hayward's instructions and applicable codes.\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px;\"\u003e\n\u003cstrong\u003eWhat is the warranty, and is this thermistor final sale?\u003c\/strong\u003e\u003cbr\u003eThe Hayward FDXLTER1930 includes a 1-year manufacturer warranty. This replacement thermistor is final sale, so customers should confirm heater compatibility and manufacturing date before purchasing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":46889400500393,"sku":"FDXLTER1930","price":74.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2647\/4409\/files\/FDXLTER1930.jpg?v=1773673053","url":"https:\/\/ultimatepools.ca\/products\/hayward-heater-thermistor-fdxlter1930","provider":"ultimatepools.ca","version":"1.0","type":"link"}