{"product_id":"hayward-h-series-fd-heater-thermistor-fdxlter1930","title":"Hayward Thermistor for FD Heaters | FDXLTER1930","description":"\u003cp\u003eThe Hayward Thermistor (FDXLTER1930) is the OEM replacement temperature-sensing thermistor for the Universal H-Series FD pool and spa heater line.\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\u003eMounted in the manifold adapter inlet, this thermistor monitors water temperature and communicates with the heater's control system to regulate burner operation. Replacing a failed thermistor restores accurate temperature sensing and proper heater cycle control.\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;\"\u003eFDXLTER1930\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;\"\u003e610377073790\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eA faulty thermistor often presents as erratic temperature readings, a heater that short-cycles, or a heater that fails to ignite when the pool temperature is below the set point. Before ordering, confirm the fault is isolated to the thermistor — check for error codes in your heater's control panel that specifically indicate a temperature sensor fault. Always power down the heater completely and allow the unit to cool before any component access.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-06-22 --\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":51774115217683,"sku":"FDXLTER1930","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/hayward-thermistor-for-fd-heaters-fdxlter1930-1.webp?v=1782890597","url":"https:\/\/poolaroo.com\/products\/hayward-h-series-fd-heater-thermistor-fdxlter1930","provider":"Poolaroo","version":"1.0","type":"link"}