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The Bard S8401-002 is an OEM 3-pole contactor rated for 25 amps with a 24V control coil, used to reliably switch high-voltage power to major loads like the compressor and outdoor fan on many Bard wall-mount and packaged HVAC units. If your system is chattering, failing to pull in, or showing burnt or pitted contacts, replacing the contactor is a common corrective repair that helps restore dependable starts and protects other electrical components from heat and arcing. Match the coil voltage (24V) and pole count (3P) to your existing contactor and confirm the unit model and wiring layout before installation to ensure proper fit and safe operation with genuine Bard replacement parts.