{"product_id":"a-o-smith-100108899-high-limit-switch-200f-manual-reset","title":"A.o. Smith 100108899 High Limit Switch 200F Manual Reset","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe A.O. SMITH 100108899 is a manual reset high limit switch assembly designed for venting applications on commercial water heaters. This switch monitors flue gas or exhaust temperatures and trips when temperatures exceed the rated threshold of 200 degrees F, shutting down the burner to prevent damage or unsafe conditions. Resetting requires a manual action, making it a positive-shutoff safety device. Installation is typically performed by licensed plumbers or HVAC technicians servicing commercial gas water heater systems.\u003c\/p\u003e\u003cp\u003eThis switch assembly is a direct replacement part for A.O. SMITH power direct vent water heater models. It is used in residential and light commercial applications where venting safety controls are required. The manual reset design ensures the unit does not restart automatically after a high-temperature event, requiring a technician to diagnose the root cause before returning the appliance to service.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eManual reset design requires deliberate technician action before restart after a trip event\u003c\/li\u003e\n\u003cli\u003eRated trip temperature of 200 degrees F for venting overheat protection\u003c\/li\u003e\n\u003cli\u003eOEM replacement assembly for A.O. SMITH GPD and GPDX series water heaters\u003c\/li\u003e\n\u003cli\u003eDesigned for venting circuit safety monitoring on gas water heater systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with A.O. SMITH models GPD 40, GPD 50, GPDX 50, and GPD 75.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber or qualified HVAC technician. Shut off gas supply and disconnect electrical power to the water heater before beginning any service work. Follow applicable local codes and manufacturer service documentation when replacing limit switches or venting safety assemblies. Do not bypass or jumper the switch under any circumstances.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature\u003c\/strong\u003e: 200 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Type\u003c\/strong\u003e: Manual Reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Replacement Part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: A.O. SMITH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 100108899\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TAILWIND","offers":[{"title":"Default Title","offer_id":51150391542066,"sku":"100108899","price":42.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305989186.jpg?v=1778611001","url":"https:\/\/voomisupply.com\/products\/a-o-smith-100108899-high-limit-switch-200f-manual-reset","provider":"Voomi Supply","version":"1.0","type":"link"}