{"product_id":"stack-flue-sensor-replacement-kit","title":"Pentair ETi400 Stack Flue Sensor Replacement Kit","description":"\u003cp\u003eThe Pentair 475601 is the stack flue sensor replacement kit for the ETi400 pool heater. It is the genuine Pentair part, supplied as a kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it monitors\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe stack flue sensor sits in the exhaust path and reads the temperature of the gas leaving the heat exchanger. The control board uses that reading as a safety input. If the sensor drifts, opens or shorts, the heater stops trusting the reading and shuts the burner down rather than running blind.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA heater that locks out on a stack or flue sensor fault, or that will not complete an ignition sequence, is the usual reason this part gets ordered. Check the fault code in the ETi400 manual before you buy, because other sensors on the heater can produce a similar lockout.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48626213257428,"sku":"PUR-151-0306","price":69.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_e3e5128a-c5ff-49fe-8e5e-72a9a082a47f.jpg?v=1788706267","url":"https:\/\/www.activepoolsupply.com\/products\/stack-flue-sensor-replacement-kit","provider":"Active Pool Supply","version":"1.0","type":"link"}