{"product_id":"weil-mclain-381-356-589","title":"Weil McLain 381-356-589 Temperature Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 381-356-589 Supply Temperature Sensor\u003c\/strong\u003e is a \u003cstrong\u003ethreaded probe\u003c\/strong\u003e \u003cstrong\u003esensor\u003c\/strong\u003e with a \u003cstrong\u003eblue connector\u003c\/strong\u003e. \u003cstrong\u003eWeil McLain\u003c\/strong\u003e's \u003cstrong\u003eCGa Series 4\u003c\/strong\u003e and \u003cstrong\u003eCGi Series 5\u003c\/strong\u003e parts lists name \u003cstrong\u003e381-356-589\u003c\/strong\u003e the \u003cstrong\u003eTemperature\/LWCO sensor\u003c\/strong\u003e, and it appears on the section assembly pages of both lists, so it is a manufacturer-listed part for those \u003cstrong\u003eboiler\u003c\/strong\u003e lines. Parts retailers describe the same number as a \u003cstrong\u003esupply temperature sensor\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eA probe \u003cstrong\u003esensor\u003c\/strong\u003e like this reads the temperature of the water in the \u003cstrong\u003eboiler\u003c\/strong\u003e and passes that reading to the \u003cstrong\u003econtrol\u003c\/strong\u003e. The \u003cstrong\u003eLWCO\u003c\/strong\u003e in the manufacturer's name stands for \u003cstrong\u003elow water cutoff\u003c\/strong\u003e, a safeguard that stops the burner when there is not enough water in the \u003cstrong\u003eboiler\u003c\/strong\u003e. Because the \u003cstrong\u003esensor\u003c\/strong\u003e is a protective and \u003cstrong\u003econtrol\u003c\/strong\u003e input, a failed or drifting unit can cause erratic temperature readings, nuisance lockouts or error codes on the display. Replacing it with the listed part gets the \u003cstrong\u003econtrol\u003c\/strong\u003e back to reading the real temperature.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003esensor\u003c\/strong\u003e installs with its threaded body into the \u003cstrong\u003eboiler\u003c\/strong\u003e and plugs into the harness with the \u003cstrong\u003eblue connector\u003c\/strong\u003e. Take the usual precautions when removing the old one: make sure the \u003cstrong\u003eboiler\u003c\/strong\u003e is cool and the pressure is relieved, then follow the \u003cstrong\u003eboiler\u003c\/strong\u003e manual for sealing the threads and handling the connector. Check the old \u003cstrong\u003esensor\u003c\/strong\u003e against the product photo before you order, and send us your \u003cstrong\u003eboiler\u003c\/strong\u003e model and serial number if you would like our team to confirm fit before you buy.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eListed for CGa Series 4 and CGi Series 5:\u003c\/strong\u003e \u003cstrong\u003e381-356-589\u003c\/strong\u003e appears in both \u003cstrong\u003eWeil McLain\u003c\/strong\u003e parts lists as the \u003cstrong\u003eTemperature\/LWCO sensor\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThreaded Probe Design:\u003c\/strong\u003e The threaded body threads into the \u003cstrong\u003eboiler\u003c\/strong\u003e so it reads water temperature directly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBlue Connector:\u003c\/strong\u003e Plugs into the harness with a connector that is easy to recognize against the old \u003cstrong\u003esensor\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eControl Input Replacement:\u003c\/strong\u003e Restores accurate temperature readings when a failing \u003cstrong\u003esensor\u003c\/strong\u003e is causing erratic behavior or lockouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIs the 381-356-589 a supply temperature sensor or an LWCO sensor?\u003c\/strong\u003e \u003cstrong\u003eWeil McLain\u003c\/strong\u003e's parts lists name it the \u003cstrong\u003eTemperature\/LWCO sensor\u003c\/strong\u003e, and retailers describe the same number as a \u003cstrong\u003esupply temperature sensor\u003c\/strong\u003e. It is one part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhich boilers list the 381-356-589?\u003c\/strong\u003e \u003cstrong\u003eWeil McLain\u003c\/strong\u003e's \u003cstrong\u003eCGa Series 4\u003c\/strong\u003e and \u003cstrong\u003eCGi Series 5\u003c\/strong\u003e parts lists both show it. Send us your model and serial number and our team will confirm fit before you buy.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat does a failing sensor look like?\u003c\/strong\u003e Typical signs are erratic temperature readings, nuisance lockouts and \u003cstrong\u003esensor\u003c\/strong\u003e error codes on the \u003cstrong\u003econtrol\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e\n","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":68008921432242,"sku":"381-356-589","price":114.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/381-356-589.jpg?v=1794513412","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-381-356-589","provider":"GSIstore","version":"1.0","type":"link"}