{"product_id":"weil-mclain-381-359-447","title":"Weil McLain 381-359-447 Wiring Harness","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 381-359-447 Wiring Harness, Control to Junction Box\u003c\/strong\u003e is the \u003cstrong\u003eOEM wire harness\u003c\/strong\u003e that ties the boiler's \u003cstrong\u003ejunction box\u003c\/strong\u003e to its \u003cstrong\u003econtrol module\u003c\/strong\u003e. Weil-McLain's online parts catalog lists \u003cstrong\u003e381-359-447\u003c\/strong\u003e on the \u003cstrong\u003econtrol parts\u003c\/strong\u003e page for the \u003cstrong\u003eEG-45\u003c\/strong\u003e in the \u003cstrong\u003eEG Series 7\u003c\/strong\u003e, a \u003cstrong\u003enatural gas water boiler\u003c\/strong\u003e, both with and without the \u003cstrong\u003etankless heater\u003c\/strong\u003e. It is a small part, but the \u003cstrong\u003econtrol module\u003c\/strong\u003e depends on it for the \u003cstrong\u003epower and signal path\u003c\/strong\u003e back to the \u003cstrong\u003ejunction box\u003c\/strong\u003e, so a tired harness can cause problems that look like a bad module.\u003c\/p\u003e\n\n\u003cp\u003eThe harness is a \u003cstrong\u003epre-built assembly\u003c\/strong\u003e: \u003cstrong\u003eblack, white and green leads\u003c\/strong\u003e, a \u003cstrong\u003emetal conduit connector\u003c\/strong\u003e at one end, \u003cstrong\u003ering terminals\u003c\/strong\u003e, and a \u003cstrong\u003ewhite multi-pin plug\u003c\/strong\u003e at the other. That means there is no cutting, splicing or crimping, and the \u003cstrong\u003eterminated ends\u003c\/strong\u003e land where the factory harness did. Match it by \u003cstrong\u003eboiler model\u003c\/strong\u003e and not by the word \"harness\" alone, because \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e uses different harnesses on different boiler families and sizes. The application confirmed here is the \u003cstrong\u003eEG-45\u003c\/strong\u003e, so for any other \u003cstrong\u003eEG\u003c\/strong\u003e size, check the \u003cstrong\u003emodel number\u003c\/strong\u003e and \u003cstrong\u003eserial number\u003c\/strong\u003e on the boiler before you order.\u003c\/p\u003e\n\n\u003cp\u003eWhen a boiler shows a \u003cstrong\u003edead control\u003c\/strong\u003e, \u003cstrong\u003eintermittent lockouts\u003c\/strong\u003e or a module that seems to \u003cstrong\u003elose power\u003c\/strong\u003e when the wiring is touched, inspect the harness before you condemn the \u003cstrong\u003econtrol module\u003c\/strong\u003e. Look for \u003cstrong\u003echafed insulation\u003c\/strong\u003e at the \u003cstrong\u003econduit connector\u003c\/strong\u003e, \u003cstrong\u003eheat damage\u003c\/strong\u003e on the leads, a \u003cstrong\u003eloose or backed-out pin\u003c\/strong\u003e in the \u003cstrong\u003emulti-pin plug\u003c\/strong\u003e, and a \u003cstrong\u003ering terminal\u003c\/strong\u003e that has worked loose under its screw. With the \u003cstrong\u003epower off and locked out\u003c\/strong\u003e, check each lead for \u003cstrong\u003econtinuity\u003c\/strong\u003e end to end. To replace it, \u003cstrong\u003edisconnect the electrical supply\u003c\/strong\u003e, label or photograph the \u003cstrong\u003eterminal positions\u003c\/strong\u003e, remove the old \u003cstrong\u003eharness\u003c\/strong\u003e from the \u003cstrong\u003ejunction box\u003c\/strong\u003e and the \u003cstrong\u003emodule\u003c\/strong\u003e, fit the new \u003cstrong\u003e381-359-447\u003c\/strong\u003e, secure the \u003cstrong\u003econduit connector\u003c\/strong\u003e, restore power and run a \u003cstrong\u003ecall for heat\u003c\/strong\u003e to confirm a normal \u003cstrong\u003eignition sequence\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFactory-built harness:\u003c\/strong\u003e The \u003cstrong\u003e381-359-447\u003c\/strong\u003e comes with its \u003cstrong\u003eleads, ring terminals, conduit connector and multi-pin plug\u003c\/strong\u003e already assembled, so there is nothing to splice.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMatches the Weil-McLain parts catalog:\u003c\/strong\u003e It is the part \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e lists as the \u003cstrong\u003econtrol to junction box wiring harness\u003c\/strong\u003e for the \u003cstrong\u003eEG-45\u003c\/strong\u003e natural gas water boiler.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSaves a misdiagnosis:\u003c\/strong\u003e A worn \u003cstrong\u003eharness\u003c\/strong\u003e is a small repair compared with replacing a \u003cstrong\u003econtrol module\u003c\/strong\u003e that was never actually bad.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClean, secure connections:\u003c\/strong\u003e The \u003cstrong\u003emetal conduit connector\u003c\/strong\u003e and \u003cstrong\u003eterminated leads\u003c\/strong\u003e keep the \u003cstrong\u003ejunction box\u003c\/strong\u003e wiring tidy and protected.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the 381-359-447 connect?\u003c\/strong\u003e\u003cbr\u003e\nIt connects the boiler's \u003cstrong\u003ejunction box\u003c\/strong\u003e to the \u003cstrong\u003econtrol module\u003c\/strong\u003e. It is described as a \u003cstrong\u003ewire harness, junction box to module\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich boilers use the 381-359-447?\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eWeil-McLain's\u003c\/strong\u003e parts catalog shows it for the \u003cstrong\u003eEG-45\u003c\/strong\u003e, \u003cstrong\u003eEG Series 7\u003c\/strong\u003e, \u003cstrong\u003enatural gas water boiler\u003c\/strong\u003e, with and without the \u003cstrong\u003etankless heater\u003c\/strong\u003e. Confirm any other boiler by \u003cstrong\u003emodel number\u003c\/strong\u003e and \u003cstrong\u003eserial number\u003c\/strong\u003e before you order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I know if the harness is the problem?\u003c\/strong\u003e\u003cbr\u003e\nCheck for \u003cstrong\u003echafed or heat-damaged insulation\u003c\/strong\u003e, a \u003cstrong\u003eloose pin\u003c\/strong\u003e in the \u003cstrong\u003emulti-pin plug\u003c\/strong\u003e, a \u003cstrong\u003eloose ring terminal\u003c\/strong\u003e and any lead that fails a \u003cstrong\u003econtinuity\u003c\/strong\u003e test with the \u003cstrong\u003epower locked out\u003c\/strong\u003e.\u003c\/p\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","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":67900979249330,"sku":"381-359-447","price":39.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/381-359-447.jpg?v=1793906635","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-381-359-447","provider":"GSIstore","version":"1.0","type":"link"}