{"product_id":"3l05-3-copeland-comfort-control-white-rodgers-210-to-250-degrees-f-adjustable-temperature-diff","title":"3L05-3 Copeland Comfort Control (White Rodgers), 210 to 250 degrees F Adjustable Temperature Diff","description":"\u003ch1\u003e3L05-3 Copeland Comfort Control (White Rodgers), 210 to 250 degrees F Adjustable Temperature Diff\u003c\/h1\u003e\n\u003cstyle\u003e\na {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003e3L05-3 Adjustable Snap Disc Limit Switch (White-Rodgers \/ Copeland Comfort Control)\u003c\/strong\u003e is an automatic reset temperature safety control designed for HVAC, heating, commercial, and industrial equipment requiring adjustable high-temperature protection. Featuring an \u003cstrong\u003eadjustable temperature range from 210°F to 250°F\u003c\/strong\u003e with a \u003cstrong\u003e40°F differential\u003c\/strong\u003e, this \u003cstrong\u003eSPST open-on-rise\u003c\/strong\u003e switch interrupts the electrical circuit when temperatures exceed the selected setpoint and automatically resets after cooling.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCross-Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3L05-3\u003c\/li\u003e\n\u003cli\u003e3L053\u003c\/li\u003e\n\u003cli\u003eWhite-Rodgers 3L05-3\u003c\/li\u003e\n\u003cli\u003eCopeland Comfort Control 3L05-3\u003c\/li\u003e\n\u003cli\u003e74T11 Series Adjustable Limit Switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDirect OEM\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhite-Rodgers 3L05-3\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatible Brands\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWhite-Rodgers\u003c\/li\u003e\n\u003cli\u003eEmerson\u003c\/li\u003e\n\u003cli\u003eCopeland\u003c\/li\u003e\n\u003cli\u003eYork\u003c\/li\u003e\n\u003cli\u003eColeman\u003c\/li\u003e\n\u003cli\u003eLuxaire\u003c\/li\u003e\n\u003cli\u003eGoodman\u003c\/li\u003e\n\u003cli\u003eRheem\u003c\/li\u003e\n\u003cli\u003eUniversal HVAC Applications\u003c\/li\u003e\n\u003cli\u003eCommercial Heating Equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eUsed in HVAC and heating equipment to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProvide adjustable overtemperature protection\u003c\/li\u003e\n\u003cli\u003eOpen the circuit at a user-selected temperature between 210°F and 250°F\u003c\/li\u003e\n\u003cli\u003eAutomatically reset after cooling by approximately 40°F\u003c\/li\u003e\n\u003cli\u003eProtect heat exchangers, electric heaters, motors, and control circuits\u003c\/li\u003e\n\u003cli\u003ePrevent equipment damage caused by excessive temperatures\u003c\/li\u003e\n\u003cli\u003eSupport OEM and replacement service applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eRelated Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable Limit Switch\u003c\/li\u003e\n\u003cli\u003eSnap Disc Thermostat\u003c\/li\u003e\n\u003cli\u003eHigh Limit Control\u003c\/li\u003e\n\u003cli\u003eFan \u0026amp; Limit Control\u003c\/li\u003e\n\u003cli\u003eFurnace Control Board\u003c\/li\u003e\n\u003cli\u003eBlower Relay\u003c\/li\u003e\n\u003cli\u003eTransformer\u003c\/li\u003e\n\u003cli\u003eTemperature Sensor\u003c\/li\u003e\n\u003cli\u003eSafety Cutoff Switch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnician Notes\u003c\/h3\u003e\n\u003cp\u003eThe 3L05-3 is an \u003cstrong\u003eautomatic reset SPST limit switch\u003c\/strong\u003e with an \u003cstrong\u003eadjustable operating range of 210°F to 250°F\u003c\/strong\u003e and a \u003cstrong\u003e40°F differential\u003c\/strong\u003e. The contacts remain closed during normal operation and open when the selected limit temperature is reached. Once the sensed temperature decreases approximately 40°F below the trip point, the contacts automatically reset and restore circuit operation.\u003c\/p\u003e\n\u003cp\u003eThis adjustable design is commonly used where specific overtemperature protection settings are required for OEM equipment, electric heat systems, and specialty heating applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Symptoms of Failure\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFrequent high-limit trips\u003c\/li\u003e\n\u003cli\u003eEquipment shuts down unexpectedly\u003c\/li\u003e\n\u003cli\u003eOpen safety circuit faults\u003c\/li\u003e\n\u003cli\u003eIntermittent operation\u003c\/li\u003e\n\u003cli\u003eNo continuity through switch contacts\u003c\/li\u003e\n\u003cli\u003eHeating system lockouts\u003c\/li\u003e\n\u003cli\u003eFailure to reset properly\u003c\/li\u003e\n\u003cli\u003eTemperature-related service calls\u003c\/li\u003e\n\u003cli\u003eReduced equipment reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect power before servicing.\u003c\/li\u003e\n\u003cli\u003eVerify the required temperature setting before adjustment.\u003c\/li\u003e\n\u003cli\u003eConfirm switch action is \u003cstrong\u003eOpen on Rise\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSet the desired cut-out temperature before installation.\u003c\/li\u003e\n\u003cli\u003eMount securely to the original sensing location.\u003c\/li\u003e\n\u003cli\u003eInspect terminals for corrosion or heat damage.\u003c\/li\u003e\n\u003cli\u003eVerify continuity and operation after installation.\u003c\/li\u003e\n\u003cli\u003eTest equipment through a complete operating cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch3\u003eRecommended Inspection Items\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlower motor operation\u003c\/li\u003e\n\u003cli\u003eAir filter condition\u003c\/li\u003e\n\u003cli\u003eAirflow restrictions\u003c\/li\u003e\n\u003cli\u003eHeat exchanger temperature\u003c\/li\u003e\n\u003cli\u003eElectric heater elements\u003c\/li\u003e\n\u003cli\u003eWiring harness condition\u003c\/li\u003e\n\u003cli\u003eElectrical terminals\u003c\/li\u003e\n\u003cli\u003eFurnace control board\u003c\/li\u003e\n\u003cli\u003eEquipment temperature rise\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eControls, Temperature, 210 to 250 degrees F Adjustable Temperature Range, 40 degrees F Differential Temperature, SPST Open on Rise Switch Action, Snap Disc Auto Reset Limit Switch (74T11-310712)\u003c\/span\u003e\u003c\/p\u003e","brand":"Neuco","offers":[{"title":"Default Title","offer_id":39680513409090,"sku":"3L05-3","price":30.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/products\/th-2022-01-24T014805.879_eb44857e-9a8c-4103-bbb7-c54f40886130.jpg?v=1643015195","url":"https:\/\/hvacpartstore.com\/products\/3l05-3-copeland-comfort-control-white-rodgers-210-to-250-degrees-f-adjustable-temperature-diff","provider":"HVACpartstore","version":"1.0","type":"link"}