Bard HVAC 8406-086BX Pressure Switch Replacement is necessary if the

Replacement is necessary if the furnace fan fails to start after the burner has ignited and reached temperature

When resolving issues with furnace burner replacement

Durable OEM Construction: Built by Lennox to match the exact specifications required for Lennox and Allied Air branded equipment

and 277V AC applications at 22 Amps

Constructed with oil and heat-resistant synthetic polymers and reinforced with high-tensile cord members

Bard HVAC 8406-086BX Pressure Switch Replacement is necessary if theThe Bard 8406 086BX Pressure Switch is a critical safety and performance component designed for specific air proving applications within Bard wall mount units and HVAC systems. This 0. 35" WC SPDT pressure switch functions as a differential air pressure sensor, ensuring proper blower operation and venting before allowing the ignition sequence or cooling cycle to proceed. It is a direct factory replacement and is electrically and mechanically identical