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The Bard 8201-062 is an OEM SPDT switching relay with a 24 VAC coil and contacts rated 3A at up to 277 VAC, used in Bard wall mount and packaged HVAC equipment to let a low voltage control signal safely switch a higher voltage load. When a relay is pitted, sticking, or intermittently dropping out, it can cause unreliable calls for cooling, heating, or alarm functions, so replacing it with the correct Bard part helps restore dependable operation and proper sequencing. Verify the relay style and wiring match your unit and always compare the original relay markings and terminal layout before installation to ensure correct fit and function.