{"product_id":"pentair-520403-heater-dual-relay-kit","title":"Pentair 520403 Heater Dual Relay Kit","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair 520403 Heater Dual Relay Kit is a replacement relay kit used in compatible Pentair heater control systems. It manages power distribution within the heater assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eA faulty relay can prevent heater startup or cause intermittent operation. Replacing the dual relay kit restores proper electrical switching. Reliable relay performance supports consistent heating cycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturer part number 520403\u003c\/li\u003e\n\u003cli\u003eHeater dual relay kit\u003c\/li\u003e\n\u003cli\u003eCompatible with select Pentair heaters\u003c\/li\u003e\n\u003cli\u003eControls internal electrical switching\u003c\/li\u003e\n\u003cli\u003eService replacement component\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003eTurn off electrical and gas supply before servicing. Confirm by manufacturer part number before ordering. Follow manufacturer wiring instructions during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Pentair Brand\u003c\/strong\u003e\u003cbr\u003ePentair heaters are widely installed in residential pool systems. Their electrical components are designed for service and replacement. Genuine Pentair relay kits help maintain safe heater operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eCommon during heater ignition troubleshooting or when restoring power distribution inside the control panel.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078636859666,"sku":"520403","price":186.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PEN520403_0.jpg?v=1772563740","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-520403-heater-dual-relay-kit","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}