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Bard part number 8201-011 is an OEM SPST normally open control relay with a 240 volt coil and contacts rated 3A at 250V, used in Bard wall mount HVAC equipment to switch a control or load circuit on command from the unit’s controls. When a relay is weak or has pitted contacts, you may see intermittent operation or components that do not energize consistently; replacing with the correct Bard relay restores proper, reliable switching and helps protect the rest of the control circuit. Confirm coil voltage, contact arrangement, and the specific unit model and serial before ordering to ensure proper fit and function.