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Bard 9044-266 is an OEM flame sensor used on Bard gas heating sections to prove burner flame during ignition and keep the system running safely. This sensor helps the control board confirm flame signal so the gas valve can remain energized, reducing nuisance lockouts caused by a weak or intermittent flame-sense circuit. If your Bard unit lights briefly and then shuts down, or you are seeing flame-proving faults after cleaning and checking grounds, replacing the sensor with the correct Bard 9044-266 part is a smart next step to restore reliable heat operation. Verify fit by matching your unit model and serial number, since flame sensors can vary by mounting and lead configuration.