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The Bard 8400-004 Flame Detector is an OEM safety sensing component used on Bard gas heating equipment to confirm flame presence during burner operation and provide a reliable signal back to the control circuit. If your unit is locking out on flame failure, short-cycling on heat, or showing intermittent ignition issues, replacing the flame detector with the correct Bard part can help restore proper flame proving and safe system operation. Because flame-sensing performance depends on correct mounting position, clean burner flame, and solid grounding, verify your Bard model and wiring layout in the unit manual before ordering, and match the part number 8400-004 exactly for proper fit and function.
* Orders less than $50 may incure a minimum order fee.