{"product_id":"bradford-white-239-49817-00","title":"Bradford White 239-49817-00 Harness","description":"\u003cp\u003eThe \u003cstrong\u003eBradford White 239-49817-00 Simulated Resistive Device Harness\u003c\/strong\u003e is a short factory harness that gives the water heater’s gas control a fixed \u003cstrong\u003esimulated resistive device\u003c\/strong\u003e to read as part of its self-checks. Bradford White lists it for the \u003cstrong\u003ethrough-the-wall gas water heaters\u003c\/strong\u003e \u003cstrong\u003eM1TW40S(BN, CX), M1TW50S(BN, CX), M2TW50T(BN, CX) and M2TW65T(BN, CX)\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eBradford White’s service manual for these \u003cstrong\u003eTW series\u003c\/strong\u003e heaters (\u003cstrong\u003emanual 45960A\u003c\/strong\u003e) spells out the check. The control tests the device before it allows outputs to energize, and the reading must fall \u003cstrong\u003ebetween 25,000 ohms and 45,000 ohms\u003c\/strong\u003e. If the harness is out of range, the diagnostic LED flashes \u003cstrong\u003eseven flashes with a three-second pause\u003c\/strong\u003e, the code the manual lists as the \u003cstrong\u003esimulated resistive device harness out of specification\u003c\/strong\u003e, and a related specification-check code shows as \u003cstrong\u003eeight-one flash\u003c\/strong\u003e. The harness is a molded lead with a \u003cstrong\u003eblack heat-shrink sleeve\u003c\/strong\u003e over one end and a \u003cstrong\u003ewhite multi-pin plug-in connector\u003c\/strong\u003e on the other.\u003c\/p\u003e\n\n\u003cp\u003eWhen a TW heater throws that seven-flash code, start with the connector: unplug it, check for a loose or corroded terminal, and reseat it firmly. If the code returns, measure the harness resistance with a meter with the power off and the harness unplugged; a reading outside the \u003cstrong\u003e25,000 to 45,000 ohm\u003c\/strong\u003e window means the harness itself has failed and should be replaced rather than bypassed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMatches the Control’s Spec:\u003c\/strong\u003e Built to read inside the \u003cstrong\u003e25,000 to 45,000 ohm\u003c\/strong\u003e window the gas control checks for, so the self-test passes the way the factory intended.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClears the Seven-Flash Code:\u003c\/strong\u003e Replaces the failed component behind the \u003cstrong\u003esimulated resistive device harness out of specification\u003c\/strong\u003e fault instead of leaving you chasing the gas valve.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlug-In Install:\u003c\/strong\u003e The \u003cstrong\u003emolded white connector\u003c\/strong\u003e plugs straight in — no splicing, crimping or field-built resistor networks.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenuine OEM Harness:\u003c\/strong\u003e A Bradford White factory part for the \u003cstrong\u003eM1TW\u003c\/strong\u003e and \u003cstrong\u003eM2TW\u003c\/strong\u003e through-the-wall platform, not a generic resistor.\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\u003eWhat does this harness do?\u003c\/strong\u003e It supplies the fixed resistance the gas control reads as its \u003cstrong\u003esimulated resistive device\u003c\/strong\u003e. The control checks that reading before allowing outputs, which is why a bad harness can keep a heater from firing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhich heaters use it?\u003c\/strong\u003e The through-the-wall gas models \u003cstrong\u003eM1TW40S\u003c\/strong\u003e, \u003cstrong\u003eM1TW50S\u003c\/strong\u003e, \u003cstrong\u003eM2TW50T\u003c\/strong\u003e and \u003cstrong\u003eM2TW65T\u003c\/strong\u003e (BN, CX). Confirm the model on the rating plate.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow do I know it is the problem?\u003c\/strong\u003e A diagnostic LED code of \u003cstrong\u003eseven flashes, three-second pause\u003c\/strong\u003e points to this harness being out of specification, and a resistance reading outside \u003cstrong\u003e25,000 to 45,000 ohms\u003c\/strong\u003e confirms it.\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","brand":"Bradford White","offers":[{"title":"Default Title","offer_id":67618006958258,"sku":"239-49817-00","price":23.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/239-49817-00.jpg?v=1790964428","url":"https:\/\/www.gsistore.com\/products\/bradford-white-239-49817-00","provider":"GSIstore","version":"1.0","type":"link"}