{"product_id":"hayward_fdxlwps1931","title":"Hayward Pressure Switch for FD Series Heaters | FDXLWPS1931","description":"\u003cp\u003eThe Hayward Pressure Switch (FDXLWPS1931) is the OEM replacement water pressure switch for Hayward FD Series pool and spa heaters.\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\u003eThis pressure switch monitors water flow conditions within the heater and prevents the unit from firing when water pressure is insufficient. By blocking ignition under low-flow conditions, it protects the heat exchanger and other internal components from heat damage caused by inadequate water circulation.\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;\"\u003eFDXLWPS1931\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;\"\u003e610377401876\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\u003eChannel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eOpen Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePoolaroo Pro Tip\u003c\/h3\u003e\n\u003cp\u003eBefore replacing the pressure switch, confirm the heater's water flow rate is within the manufacturer's specified range. A faulty pressure switch can mimic symptoms of inadequate flow — such as the heater failing to ignite — but replacing the switch without addressing an underlying flow restriction will not resolve the issue. Always have a licensed pool professional or qualified HVAC technician perform diagnosis and replacement of heater components.\u003c\/p\u003e\n\n\u003c!-- wft:processed:manual:2026-06-22 --\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":54303488377107,"sku":"FDXLWPS1931","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/hayward-pressure-switch-for-fd-series-heaters-fdxlwps1931.webp?v=1782885674","url":"https:\/\/poolaroo.com\/products\/hayward_fdxlwps1931","provider":"Poolaroo","version":"1.0","type":"link"}