{"product_id":"49l89-lennox-l150-30f-3-limit-switch","title":"49L89 Lennox L150-30F 3\" limit switch","description":"\u003c!-- rlb --\u003e\n\u003ch1\u003e49L89 Lennox L150-30F 3\" limit switch \u003c\/h1\u003e\n\u003cp\u003eLimit control switch. L150F-30. Back plate measures 1-7\/8\" x 3-1\/8\" with two 1\/4\" spade terminals. 3\" arm length. Switch opens at 150F, resets at 120F. 49L8901.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eLennox 49L89\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003eL150-30F high-limit switch\u003c\/strong\u003e used in Lennox forced-air furnaces. This safety switch opens at \u003cstrong\u003e150°F\u003c\/strong\u003e and automatically resets after the temperature drops by \u003cstrong\u003e30°F\u003c\/strong\u003e, protecting the heat exchanger from overheating due to airflow restrictions, dirty filters, blower failure, or duct blockage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis 3-inch insertion-depth limit switch is engineered to Lennox specifications for precise temperature response, reliable burner shutdown, and safe automatic reset. Using the OEM switch maintains furnace safety certifications and proper cycling behavior.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGrounded product data:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e, \u003cstrong\u003eopens at 150°F\u003c\/strong\u003e, \u003cstrong\u003e30°F differential\u003c\/strong\u003e, \u003cstrong\u003eautomatic reset\u003c\/strong\u003e, and furnace overheating protection. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"ps-2\"\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Hot \u0026amp; Cold confirms \u003cstrong\u003eOEM replacement\u003c\/strong\u003e, \u003cstrong\u003e3\" limit\u003c\/strong\u003e, and compatibility with Lennox, Allied, Armstrong, Concord, Ducane, Magic Chef, and Magic-Pak models. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"relative pb-6 w-full after:border-b after:border-stroke-300 after:w-full after:absolute after:mt-3\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference \u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eDirect OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e49L89 — Lennox L150-30F Limit Switch (3\")\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eReplaces \/ Interchange\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e49L8901\u003c\/strong\u003e (older Lennox number) \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-lg-strong pb-1 [\u0026amp;:not(:first-child)]:pt-3.5\"\u003e\u003cstrong\u003eCompatible Furnace Families\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e(Confirmed across Parts Town \u0026amp; Technical Hot \u0026amp; Cold)\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLennox G60DFV series\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLennox KGA092 \/ KGA102 \/ KGA120 \/ KGA150 series\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLennox LGH092 \/ LGH102 \/ LGH120 \/ LGH150 \/ LGH152 series\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAllied, Armstrong, Concord, Ducane, Magic Chef, Magic-Pak equivalents \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"relative pb-6 w-full after:border-b after:border-stroke-300 after:w-full after:absolute after:mt-3\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnician Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 150°F\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDifferential:\u003c\/strong\u003e 30°F (auto-reset at ~120°F) \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"ps-2\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 3\" insertion depth\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCircuit:\u003c\/strong\u003e SPST, normally closed (opens on temperature rise)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFunction:\u003c\/strong\u003e Protects heat exchanger from overheating\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCommon Symptoms:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFurnace starts then shuts down (limit opening)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBlower runs continuously while burners stay off\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eShort-cycling\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDo NOT up-rate the limit switch\u003c\/strong\u003e — using a higher temperature limit is unsafe and can damage the heat exchanger.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAlways diagnose airflow issues first: dirty filter, blower failure, blocked return, closed registers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Neuco","offers":[{"title":"Default Title","offer_id":13004494339,"sku":"49L89","price":21.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/products\/s-l200.jpg?v=1600999521","url":"https:\/\/hvacpartstore.com\/products\/49l89-lennox-l150-30f-3-limit-switch","provider":"HVACpartstore","version":"1.0","type":"link"}