Bard HVAC 8612-043BX Board 321042-401 Variable Speed Control: Automatically compensates

Variable Speed Control: Automatically compensates for external static pressure to maintain constant CFM throughout the heating and cooling cycles

maintaining the factory-specified seal between the flue collector plate and the heat exchanger

Common Questions Can I use a single dry contact to trigger multiple RIB21CDC relays

Can I use this thermostat for a heat pump with emergency heat

Bard HVAC 8612-043BX Board 321042-401 Variable Speed Control: Automatically compensatesThe Bard HVAC 8612 043BX Main Controller Board is the core replacement component for the MC4001 series lead lag logic systems. Specially engineered for solid state dual unit controllers, this Bard part 8612 043BX manages the sequencing and operational cycling between two HVAC wall mount units. It is fully compatible with Bard MC4001 A, MC4001 AC, MC4001 B, and MC4001 BC models, ensuring seamless integration with existing low voltage control circuits.