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8406-051 OBSOLETE
- PRESSURE SWITCH .45" W.C.
Bard part 8406-051 is a 0.45 in. water column pressure switch used as a safety proving device in Bard HVAC equipment, commonly in gas heat applications where the control board must confirm proper draft or airflow before allowing ignition and continued operation. If a switch is out of calibration, sticking, or has a damaged diaphragm, it can cause nuisance lockouts or prevent the unit from heating at all. Replacing with the correct Bard OEM pressure switch helps restore proper safety interlock function and ensures the unit responds to the designed pressure setpoint. Verify the required setpoint and tubing/port connections against your Bard model and serial number documentation before ordering to ensure proper fit and operation.
Official replacement(s):
8406-074
- Pressure Switch .45" Wc -Boxed