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Bard part number 3003-015 is an OEM wire harness used to carry and organize electrical connections inside Bard wall-mounted HVAC equipment, helping ensure the correct plug-to-component fit and dependable signal and power routing for normal unit operation. When a harness has heat damage, brittle insulation, or loose terminals, replacing it with the correct Bard factory harness helps restore reliable connections and reduces troubleshooting time compared with repairing individual conductors. Match this harness to your unit model and wiring diagram to confirm connector style, lead count, and routing before installation.