{"product_id":"lennox-50l98-lb-95368a-high-limit-switch-kit-primary-safety","title":"Lennox 50L98 LB-95368A High Limit Switch Kit Primary Safety","description":"\u003ch1\u003eLennox 50L98 LB-95368A High Limit Switch Kit Primary Safety\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eLennox 50L98 Limit Kit\u003c\/strong\u003e serves as the critical \"safety brain\" for your furnace’s heat exchanger, constantly monitoring internal temperatures to prevent catastrophic overheating. This primary limit switch is a normally-closed safety device that automatically breaks the electrical circuit to the gas valve if temperatures exceed factory safety thresholds—usually due to a failed blower motor or a severely clogged air filter. Engineered specifically for \u003cstrong\u003eLennox G24, G32, and G40\u003c\/strong\u003e series furnaces, this kit ensures that your heating system fails safely rather than allowing the heat exchanger to crack or pose a fire hazard.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision OEM Part Number:\u003c\/strong\u003e A direct factory-authorized replacement for \u003cstrong\u003e50L98\u003c\/strong\u003e (LB-95368A), ensuring the temperature trip point and insertion depth match your furnace's original safety specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Reset Technology:\u003c\/strong\u003e Features a bimetal disc that opens on temperature rise and automatically resets once the heat exchanger cools to a safe operating level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical Safety Monitoring:\u003c\/strong\u003e Provides 24\/7 thermal protection, acting as the final line of defense against \"rollout\" conditions and heat exchanger stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed \"No Heat\" Issues:\u003c\/strong\u003e Resolves common \"Primary Limit Open\" fault codes (often a 4-flash or steady light depending on the board) that prevent the burners from igniting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Terminals:\u003c\/strong\u003e Equipped with high-conductivity 1\/4\" spade terminals designed to maintain a solid electrical connection in high-vibration environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Lennox \/ Allied Air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Lennox Industries \/ Therm-O-Disc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart #:\u003c\/strong\u003e LB-95368A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCat #:\u003c\/strong\u003e 50L98\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\/SKU:\u003c\/strong\u003e 662551356775 \/ 50L98\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.10 Pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24 VAC Control Circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e Factory Set (Specific to LB-95368A Specs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Compatible with HSI, Spark, and Standing Pilot Systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eTake a Picture First!\u003c\/strong\u003e Before removing the two mounting screws, photograph the orientation of the switch and the color of the two wires connected to it. Limit switches are \"position sensitive\" within the airflow stream; installing it upside down can lead to \"nuisance tripping\" where the furnace shuts off before the house is actually warm. \u003cstrong\u003eDiagnostic Check:\u003c\/strong\u003e If you are replacing this switch because it is \"open,\" check your air filter and indoor blower wheel first. 90% of limit switch failures are caused by restricted airflow making the switch work too hard—replacing the switch without fixing the airflow will lead to another failure within weeks.\u003c\/p\u003e\n\u003ch2\u003eCross-Reference\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded \/ Legacy:\u003c\/strong\u003e 50L9801, 100072-01, 100072-03\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawing Numbers:\u003c\/strong\u003e LB-95368A, 603411-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTherm-O-Disc Equivalent:\u003c\/strong\u003e 60T11-311545\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther Identifiers:\u003c\/strong\u003e L150-30, L170-40 (Verify Temp Code on Face)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModel Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eG24 Series\u003c\/strong\u003e (Suffixes: UH, DF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG32 Series\u003c\/strong\u003e (Suffixes: V, UH)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG40 Series\u003c\/strong\u003e (Suffixes: UH, DF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG41 Series\u003c\/strong\u003e (Suffixes: UF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG51 Series\u003c\/strong\u003e (Suffixes: MPV)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eML180 Series\u003c\/strong\u003e (Suffixes: 045, 070, 090)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":52572915728747,"sku":"50L98","price":183.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/LB-95368A.jpg?v=1763487750","url":"https:\/\/tophvacparts.com\/products\/lennox-50l98-lb-95368a-high-limit-switch-kit-primary-safety","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}