{"product_id":"ao-smith-100109908-flame-sensor-kit-1","title":"Ao Smith 100109908 Flame Sensor Kit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe AO SMITH 100109908 is a flame sensor kit designed for use in gas-fired water heating systems. The flame sensor monitors burner operation by detecting the presence of an established flame through the principle of flame rectification. When the control board no longer receives a valid signal from the sensor, it shuts down the burner to prevent unsafe operation. This kit is installed by licensed plumbers and HVAC technicians during routine maintenance or when a faulty sensor causes nuisance lockouts or ignition failures.\u003c\/p\u003e\u003cp\u003eThis flame sensor kit is suited for residential gas water heater applications where the original sensor has degraded, corroded, or failed. Flame sensors are a common service item and are typically replaced when the unit experiences repeated ignition lockouts, erratic burner cycling, or fault codes pointing to a flame-sensing failure. Install this kit as part of a scheduled service call or during a burner assembly inspection.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement flame sensor kit for gas water heater service\u003c\/li\u003e\n\u003cli\u003eMonitors burner flame via flame rectification signal to the control board\u003c\/li\u003e\n\u003cli\u003eHelps resolve nuisance lockouts and ignition fault codes\u003c\/li\u003e\n\u003cli\u003eDesigned for straightforward field replacement during routine maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement flame sensor kit for AO SMITH residential gas water heaters. Refer to the unit service manual or AO SMITH parts lookup to confirm fitment for your specific model before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber or HVAC technician familiar with gas appliance service. Shut off the gas supply and disconnect power to the water heater before beginning any service work. Handle the sensor rod carefully to avoid contaminating the sensing tip with oils or debris, as surface contamination can degrade the rectification signal. Follow all applicable local codes and the manufacturer service documentation during reassembly.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Flame Sensor Kit\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: AO SMITH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 100109908\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TAILWIND","offers":[{"title":"Default Title","offer_id":51149789233458,"sku":"100109908","price":77.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305987915.jpg?v=1778601487","url":"https:\/\/voomisupply.com\/products\/ao-smith-100109908-flame-sensor-kit-1","provider":"Voomi Supply","version":"1.0","type":"link"}