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8406-052 OBSOLETE
- Pressure Switch .35" W.C.
The Bard 8406-052 pressure switch is an OEM air-proving control used to verify proper airflow and enable safe, correct unit operation when the required pressure differential is present. Rated at 0.35 in. W.C., this switch helps prevent nuisance shutdowns and protects key components by ensuring the blower and related airflow conditions meet the factory setpoint before the system proceeds. It is commonly used in Bard wall-mounted HVAC equipment where dependable pressure sensing is required, so confirm the exact part number and wiring/port orientation against your unit’s service manual and model/serial information before ordering.
Official replacement(s):
8406-086
- Press Switch .35"W.C.Open On Fall