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8406-043 OBSOLETE
- Pressure Switch .35" W.C.
Bard part number 8406-043 is an OEM pressure switch set for 0.35 in. W.C. that helps verify proper airflow or draft conditions before the unit is allowed to operate. In Bard wall mounted equipment, this switch is used as a safety and control input by opening or closing its electrical contacts based on sensed pressure, helping prevent nuisance operation when airflow is restricted or the draft system is not performing correctly. If you are troubleshooting lockouts, intermittent cycling, or pressure related fault conditions, replacing a weak or out of calibration switch with the correct Bard OEM 8406-043 can help restore reliable, spec level operation. Confirm the required pressure rating and electrical contact style against your unit model and service literature before ordering to ensure proper fit and function.
Official replacement(s):
8406-073
- Pressure Switch .35" WC