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Bard part 9043-427 is an OEM pilot/ignitor assembly used on Bard gas heating sections to reliably light the pilot and prove flame so the main burner can fire correctly. This assembly is commonly referenced as a Q3450 pilot/ignitor style component and is associated with manufacturer number 4103200, making it a good fit when you are restoring intermittent pilot ignition performance after nuisance lockouts, weak pilot flame, or flame-sensing issues. As a genuine Bard replacement, 9043-427 is built to match factory wiring connections and mounting points for proper alignment at the burner and consistent ignition behavior, but you should still confirm compatibility by model and serial number in your Bard parts list before ordering.