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Bard 8554-024 is an OEM DSI spark igniter used in Bard wall mounted gas electric equipment to create the ignition spark that lights the burner during a call for heat. A weak or failed igniter can cause intermittent ignition, nuisance lockouts, or no heat, so replacing it with the correct Bard part helps restore dependable startup and safe burner operation. Confirm the part number and unit model compatibility before ordering, and inspect related ignition components like the ignition cable, flame sensor, and burner grounding while servicing to prevent repeat ignition issues.