{"product_id":"521138-suburban-furnace-blower-motor-12v-dc-nt-34-m-s-sp-nt-40","title":"521138 Suburban Furnace Blower Motor 12V DC, NT-34 M S SP NT-40","description":"\u003ch1\u003e521138 Suburban Furnace Blower Motor 12V DC, NT-34 M S SP NT-40\u003c\/h1\u003e\n\u003ch3\u003eFits NT‑34, NT‑34M, NT‑34S, NT‑34SP, NT‑40 Furnaces \u003cspan\u003eMOTOR OLD #231381 MTR W\/BRACKET\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReplaces: \u003c\/strong\u003e231381\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Suburban 521138 is the OEM‑spec 12‑volt blower\/combustion motor used in the NT‑34 and NT‑40 furnace families. These are the highest‑output NT‑series furnaces, requiring a larger motor to deliver both combustion air and heated‑air circulation. When the original motor becomes noisy, slow to start, or fails to reach proper RPM, this replacement restores correct airflow and reliable ignition performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt matches the original Suburban mounting pattern, shaft length, rotation, and electrical characteristics for a direct, no‑modification installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOEM‑style Suburban NT‑34 \/ NT‑40 furnace motor\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFits \u003cstrong\u003eNT‑34, NT‑34M, NT‑34S, NT‑34SP, NT‑40\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eProvides correct combustion‑air and circulation airflow\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFactory‑matched rotation, shaft length, and mounting footprint\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBuilt for high‑temperature RV furnace environments\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRestores proper ignition, heating output, and safety performance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eWhen this motor typically needs replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBlower slow to start or fails to reach ignition airflow\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFurnace locks out or cycles without lighting\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMotor overheats or trips thermal protection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGrinding, squealing, or vibration during operation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWeak airflow from registers despite clean ducts\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Laurelhurst","offers":[{"title":"Default Title","offer_id":43061231943746,"sku":"S521138","price":357.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/files\/521138_32c042cb-70af-4a62-9b26-39ce499c9b37.png?v=1772757361","url":"https:\/\/hvacpartstore.com\/products\/521138-suburban-furnace-blower-motor-12v-dc-nt-34-m-s-sp-nt-40","provider":"HVACpartstore","version":"1.0","type":"link"}