{"product_id":"haywardhseriesfdheaterventpressureswitchfdxlvps1930hppfdxlvps1930","title":"Hayward H-Series FD Heater Vent Pressure Switch | FDXLVPS1930","description":"\u003cdiv class=\"product-description\"\u003e\n\n  \u003ch2\u003eHayward FDXLWPS1930 Water Pressure Switch for Universal H-Series FD Low NOx Heaters (FDXLVPS1930 \/ FDXLVPS1930 Reference)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Hayward \u003cstrong\u003eFDXLWPS1930\u003c\/strong\u003e is an OEM \u003cstrong\u003ewater pressure switch\u003c\/strong\u003e used on Hayward\n    \u003cstrong\u003eUniversal H-Series Low NOx “FD”\u003c\/strong\u003e pool heaters. This safety switch confirms there is adequate water flow\/pressure through\n    the heater before allowing it to fire. If water flow drops (dirty filter, closed valve, pump off, air in the system, etc.), the switch\n    helps prevent heater operation to protect internal components from overheating.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eNote on part number:\u003c\/strong\u003e Many people reference this as \u003cstrong\u003eFDXLVPS1930\u003c\/strong\u003e, but the OEM part is commonly listed as\n    \u003cstrong\u003eFDXLWPS1930\u003c\/strong\u003e (pressure switch for FD heaters).\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFits \/ Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHayward \u003cstrong\u003eUniversal H-Series Low NOx FD\u003c\/strong\u003e heater models including:\n      \u003cstrong\u003eH150FDN\u003c\/strong\u003e, \u003cstrong\u003eH150FDP\u003c\/strong\u003e, \u003cstrong\u003eH200FDN\u003c\/strong\u003e, \u003cstrong\u003eH200FDP\u003c\/strong\u003e,\n      \u003cstrong\u003eH250FDN\u003c\/strong\u003e, \u003cstrong\u003eH250FDP\u003c\/strong\u003e, \u003cstrong\u003eH300FDN\u003c\/strong\u003e, \u003cstrong\u003eH300FDP\u003c\/strong\u003e,\n      \u003cstrong\u003eH350FDN\u003c\/strong\u003e, \u003cstrong\u003eH350FDP\u003c\/strong\u003e, \u003cstrong\u003eH400FDN\u003c\/strong\u003e, \u003cstrong\u003eH400FDP\u003c\/strong\u003e\n    \u003c\/li\u003e\n    \u003cli\u003eAlso used on select \u003cstrong\u003eASME\/commercial FD\u003c\/strong\u003e heater configurations (verify heater model\/serial for exact match)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat It Fixes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHeater won’t fire due to a failed or out-of-range pressure switch\u003c\/li\u003e\n    \u003cli\u003eIntermittent heat cycles caused by unstable switch contact\u003c\/li\u003e\n    \u003cli\u003eCorroded, leaking, or damaged switch discovered during service\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOEM Hayward replacement for reliable fit and correct safety operation\u003c\/li\u003e\n    \u003cli\u003eHelps prevent heater operation when water flow is insufficient\u003c\/li\u003e\n    \u003cli\u003eCritical safety component that protects the heat exchanger from low-flow overheating\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurn off power\u003c\/strong\u003e to the heater at the breaker before servicing.\u003c\/li\u003e\n    \u003cli\u003eAlways troubleshoot the \u003cstrong\u003ecause of low flow\u003c\/strong\u003e first (dirty filter, clogged baskets, closed valves, bypass settings, air leaks).\u003c\/li\u003e\n    \u003cli\u003eIf your heater uses an adjustable pressure switch, adjust only per the heater service instructions after installation.\u003c\/li\u003e\n    \u003cli\u003eInstallation should be performed by a qualified technician.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecs (Quick Reference)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOEM Part Number: \u003cstrong\u003eFDXLWPS1930\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePart Type: \u003cstrong\u003eHeater Parts\u003c\/strong\u003e (Water Pressure Switch)\u003c\/li\u003e\n    \u003cli\u003eTypical Use: \u003cstrong\u003eUniversal H-Series Low NOx FD Heaters\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eWarranty (typical OEM listing): \u003cstrong\u003e1-Year (Parts Only)\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLWPS1930\"\u003eHayward FDXLWPS1930 Pressure Switch (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=FDXLTER1930\"\u003eHayward FDXLTER1930 Thermistor (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Hayward%20H-Series%20FD%20heater%20parts\"\u003eHayward H-Series FD Heater Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=pool%20filter%20pressure%20gauge\"\u003eFilter Pressure Gauges (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=silicone%20pool%20lube\"\u003eSilicone O-Ring \u0026amp; Gasket Lubricant (search)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eIf the heater trips on flow\/pressure, clean the pump basket and filter first—restricted flow is the most common cause.\u003c\/li\u003e\n    \u003cli\u003eKeep valves fully open and verify bypass settings after any plumbing changes.\u003c\/li\u003e\n    \u003cli\u003eMaintain balanced water chemistry to reduce scale inside the heater, which can restrict flow over time.\u003c\/li\u003e\n    \u003cli\u003eIf flow issues persist, inspect for suction-side air leaks (loose lids, cracked fittings) that can reduce pressure through the heater.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":46797879443631,"sku":"FDXLVPS1930","price":53.94,"currency_code":"USD","in_stock":true}],"url":"https:\/\/freshized.com\/products\/haywardhseriesfdheaterventpressureswitchfdxlvps1930hppfdxlvps1930","provider":"Freshized","version":"1.0","type":"link"}