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The Bard 8201-079 solid state lockout relay is an OEM 24V control component used in Bard wall-mounted air conditioners and related HVAC equipment to help manage safety lockout operation during a fault or failed start condition. Designed to match Bard control-voltage requirements and wiring logic, it supports dependable unit protection and consistent troubleshooting by restoring the correct factory lockout function when a failed relay causes nuisance shutdowns or no-start complaints. Verify the original part number on the unit wiring diagram or service literature and replace power to the unit before servicing to ensure proper fit and safe installation.