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• 8406-041 OBSOLETE

• PRESSURE SWITCH .33 W.C.

Bard part number 8406-041 is an OEM pressure switch rated at 0.33 in. W.C. that helps prove proper airflow and safe operating conditions in compatible Bard wall-mount HVAC equipment. When the unit’s draft or air movement is within specification, this switch changes state to allow the control circuit to run normally, and if airflow drops out it helps shut the system down to protect components and prevent nuisance operation. Because pressure switches are application-specific by setpoint and tubing/port arrangement, match 8406-041 to your Bard model and the unit wiring diagram or service literature before ordering to ensure correct fit and proper system operation.