{"product_id":"3075269-genuine-cummins®-onan-switch","title":"3075269 | Genuine Cummins® Onan SWITCH","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: Onan SWITCH\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 3075269\u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: Cummins\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003e1. Compatible Engine Families\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eThis legacy component is primarily engineered for older, legendary \u003cb data-path-to-node=\"4\" data-index-in-node=\"67\"\u003eOnan twin-cylinder, air-cooled engines\u003c\/b\u003e that are widely regarded for their bulletproof reliability. It explicitly fits equipment powered by:\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003eOnan CCK \u0026amp; CCKA\u003c\/b\u003e series engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eOnan CCKB \u0026amp; CCKM\u003c\/b\u003e series engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003e2. Industry Applications \u0026amp; Equipment Types\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003eBecause these robust vintage engines were heavily used across multiple heavy-duty sectors before modern electrical systems took over, this switch fits:\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eVintage RV \u0026amp; Mobile Generators:\u003c\/b\u003e Installed in classic motorhomes (from the 1970s through the 1990s) utilizing onboard Onan power plants to handle interior AC loads.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eIndustrial Engine-Driven Welders:\u003c\/b\u003e Found on legacy commercial welding machines (like older Miller or Lincoln welders that used Onan CCK\/CCKA engines as their standalone power sources).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eUtility \u0026amp; Agricultural Machinery:\u003c\/b\u003e Antique tractors, industrial pumps, and specialty heavy equipment attachments that rely on original Onan internal combustion designs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Onan SWITCH is an original equipment manufacturer (OEM) electronic sensor switch designed to monitor temperature conditions within industrial diesel engines and heavy-duty generators.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eDepending on the specific engine catalog layout, this component is technically designated as an \u003cb data-path-to-node=\"4\" data-index-in-node=\"96\"\u003eEngine Intake Manifold Temperature Sensor\u003c\/b\u003e or a specialized \u003cb data-path-to-node=\"4\" data-index-in-node=\"155\"\u003eThermal Switch\u003c\/b\u003e. It is built with a heavy-duty, heat-tolerant sensing tip and a ruggedized electrical connector housing designed to survive the severe, non-stop vibrations of an active generator compartment.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003e2. Core Functions\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eManifold Temperature Monitoring:\u003c\/b\u003e It continuously reads the temperature of the air passing through the intake manifold before it enters the engine cylinders.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eCombustion Optimization:\u003c\/b\u003e By relaying accurate, real-time temperature data to the Engine Control Unit (ECU), it allows the vehicle's computer to calculate the optimal air-fuel ratio and adjust injector timing for efficient, stable combustion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eOverheating Protection:\u003c\/b\u003e If internal manifold temperatures spike dangerously high, the switch acts as a safety sensor, communicating the fault to the system to reduce engine output or trigger an emergency shutdown to prevent melting internal components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSigns of Faulty\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"height: 662.25px; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 662.25px;\"\u003e\n\u003ctd style=\"height: 662.25px; width: 100%;\"\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003e1. Rough Running and Misfires at Startup\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eIf the sensor fails or reports an incorrect temperature, the engine block may struggle to calculate the correct amount of fuel required for a cold start. This results in rough idling, engine spitting, or stumbling right after starting up until the engine warms up.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003e2. Black Smoke from the Exhaust (Rich Fuel Mixture)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eIf the switch fails dynamically and gets stuck sending a \"permanently freezing cold\" temperature reading to the computer, the ECU will continuously dump excessive amounts of diesel fuel into the cylinders. This unburnt fuel leads to heavy black exhaust smoke and poor fuel economy.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003e3. Hesitation and Sluggish Engine Response\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eUnder acceleration or varying generator loads, the air density changes rapidly inside the manifold. A lagging, contaminated, or shorted switch cannot adjust its resistance values fast enough, causing the engine to bog down, hesitate, or feel significantly down on power.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003e4. Hard Starting in Extreme Weather\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003eA dead sensor cannot help the engine recognize freezing outdoor temperatures. Without this reading, the computer will fail to activate the optimal fuel enrichment or adjust the timing properly, leading to extended cranking periods in cold winter conditions.\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003e5. \"Check Engine\" Codes \/ Malfunction Lights\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eThe vehicle's onboarding diagnostic system monitors the voltage loop of this switch constantly. Common diagnostic codes indicating a failing sensor include:\u003c\/p\u003e\n\u003cul data-path-to-node=\"13\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,0,0\"\u003e\u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"\u003eP0112:\u003c\/b\u003e Intake Air Temperature Sensor 1 Circuit Low\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,1,0\"\u003e\u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"0\"\u003eP0113:\u003c\/b\u003e Intake Air Temperature Sensor 1 Circuit High\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eCummins®\u003c\/strong\u003e is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days\u003c\/strong\u003e \u003cstrong\u003ewarranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003c\/p\u003e","brand":"Cummins®","offers":[{"title":"Default Title","offer_id":48834207154420,"sku":"3075269","price":269.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/s-l1600_6_1600x_963b00ed-011f-48ca-9f4f-0700451ec60f.jpg?v=1783540995","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/3075269-genuine-cummins%c2%ae-onan-switch","provider":"First Truck Parts","version":"1.0","type":"link"}