{"product_id":"3l09-2-copeland-comfort-control-white-rodgers-board-mount-limit-control-170f","title":"3L09-2 Copeland Comfort Control (White Rodgers) Board Mount Limit Control 170F","description":"\u003ch1\u003e3L09-2 Copeland Comfort Control (White Rodgers) Board Mount Limit Control 170F\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\u003e3L09-2 Board Mount Limit Control (White-Rodgers \/ Copeland Comfort Control)\u003c\/strong\u003e is an automatic reset temperature safety switch designed to protect HVAC equipment, heating systems, and electrical control assemblies from overheating. Featuring a \u003cstrong\u003e170°F fixed open temperature\u003c\/strong\u003e and automatic reset operation, this compact \u003cstrong\u003eboard-mounted bimetal limit switch\u003c\/strong\u003e opens the circuit when excessive temperatures are detected and automatically restores operation after cooling, helping protect sensitive components and control circuits from heat damage.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCross-Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3L09-2\u003c\/li\u003e\n\u003cli\u003e3L092\u003c\/li\u003e\n\u003cli\u003eL170F\u003c\/li\u003e\n\u003cli\u003eWhite-Rodgers 3L09-2\u003c\/li\u003e\n\u003cli\u003eCopeland Comfort Control 3L09-2\u003c\/li\u003e\n\u003cli\u003e74T Series Board Mount Limit Control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDirect OEM\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhite-Rodgers 3L09-2\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\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eApplication\u003c\/h3\u003e\n\u003cp\u003eUsed in HVAC and electrical equipment to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProtect control boards from overheating\u003c\/li\u003e\n\u003cli\u003eInterrupt circuits at elevated temperatures\u003c\/li\u003e\n\u003cli\u003eAutomatically restore operation after cooling\u003c\/li\u003e\n\u003cli\u003eSafeguard transformers and electrical compartments\u003c\/li\u003e\n\u003cli\u003ePrevent temperature-related component failure\u003c\/li\u003e\n\u003cli\u003eProvide automatic overtemperature protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eRelated Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBoard Mount Limit Switch\u003c\/li\u003e\n\u003cli\u003eSnap Disc Thermostat\u003c\/li\u003e\n\u003cli\u003eFurnace Control Board\u003c\/li\u003e\n\u003cli\u003eTransformer\u003c\/li\u003e\n\u003cli\u003eBlower Relay\u003c\/li\u003e\n\u003cli\u003eHigh Limit Control\u003c\/li\u003e\n\u003cli\u003eTemperature Sensor\u003c\/li\u003e\n\u003cli\u003eSafety Cutoff Switch\u003c\/li\u003e\n\u003cli\u003eElectrical Control Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnician Notes\u003c\/h3\u003e\n\u003cp\u003eThe 3L09-2 is an \u003cstrong\u003eautomatic reset, open-on-rise board mount limit control\u003c\/strong\u003e utilizing a compact bimetal sensing disc. The switch remains closed during normal operation and opens when the sensing surface reaches \u003cstrong\u003e170°F\u003c\/strong\u003e, interrupting the circuit to protect equipment from overheating. Once temperatures fall below the reset threshold, the contacts automatically close and restore operation.\u003c\/p\u003e\n\u003cp\u003eOften used on control boards, electrical compartments, blower assemblies, and OEM equipment where compact temperature protection is required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Symptoms of Failure\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEquipment shuts down unexpectedly\u003c\/li\u003e\n\u003cli\u003eOpen safety circuit fault\u003c\/li\u003e\n\u003cli\u003eIntermittent operation\u003c\/li\u003e\n\u003cli\u003eHigh-temperature shutdowns\u003c\/li\u003e\n\u003cli\u003eControl board overheating faults\u003c\/li\u003e\n\u003cli\u003eNo continuity through switch contacts\u003c\/li\u003e\n\u003cli\u003eFailure to reset properly\u003c\/li\u003e\n\u003cli\u003eElectrical compartment overheating\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 temperature ratings match the original component.\u003c\/li\u003e\n\u003cli\u003eConfirm switch action is \u003cstrong\u003eOpen on Rise\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eMount securely to the original location.\u003c\/li\u003e\n\u003cli\u003eInspect terminals for heat damage or corrosion.\u003c\/li\u003e\n\u003cli\u003eVerify adequate airflow around electrical components.\u003c\/li\u003e\n\u003cli\u003eTest continuity after installation.\u003c\/li\u003e\n\u003cli\u003eConfirm proper operation during a complete system cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch3\u003eRecommended Inspection Items\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eControl board condition\u003c\/li\u003e\n\u003cli\u003eTransformer temperature\u003c\/li\u003e\n\u003cli\u003eWiring harness connections\u003c\/li\u003e\n\u003cli\u003eElectrical terminals\u003c\/li\u003e\n\u003cli\u003eBlower motor operation\u003c\/li\u003e\n\u003cli\u003eAirflow restrictions\u003c\/li\u003e\n\u003cli\u003eVentilation around controls\u003c\/li\u003e\n\u003cli\u003eRelay operation\u003c\/li\u003e\n\u003cli\u003eEquipment operating temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Neuco","offers":[{"title":"Default Title","offer_id":45887390744642,"sku":"3L09-2","price":26.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/files\/Screenshot2026-11-02234410.png?v=1793688265","url":"https:\/\/hvacpartstore.com\/products\/3l09-2-copeland-comfort-control-white-rodgers-board-mount-limit-control-170f","provider":"HVACpartstore","version":"1.0","type":"link"}