Bard 9043-140 - 0.25 in. WC Pressure Switch

Bard 9043-140 is an OEM 0.25 in. w.c. pressure switch used in select Bard gas-fired furnace applications to prove proper draft before ignition, helping the control board confirm the venting and inducer system are operating within specification. When this switch is weak, sticking, or out of calibration, furnaces may short-cycle or lock out on pressure-related safety faults, so replacing it with the correct Bard part number helps restore reliable heat operation and maintains the original safety sequence. Match the pressure rating and furnace model application before ordering, and verify the tubing/port is clean and correctly routed during installation for accurate sensing.

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