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AJMRTC SEN01114 furnace flame sensor is an important safety replacement component for compatible American Standard gas furnaces. This sensing rod detects flame presence during burner operation and sends feedback signal to furnace control board. If no flame is detected, the system will cut gas supply automatically to improve household safety. Constructed with highheat resistant metal probe and insulating ceramic sleeve, this sensor can endure continuous hightemperature exposure inside combustion chamber. It effectively solves typical heating equipment problems including furnace shutting down shortly after ignition, flame loss alerts and unstable burner operation. Prepunched mounting flange enables simple directfit installation. Please disconnect power and gas supply before installation work. Suitable for home DIY furnace repair and HVAC technician service jobs to restore safe and stable furnace combustion performance.