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Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours
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This high-quality air pressure switch is a critical safety component designed for HVAC systems and gas-fired furnaces. Often referred to as an air-proving switch or draft inducer switch, its primary function is to monitor the pressure differential created by the inducer motor to ensure the exhaust system is venting correctly before allowing the heating cycle to proceed. This Single Pole Normally Open (SPNO) switch is precisely calibrated to activate at -.21 IWC (Inches of Water Column) on rise. If your furnace is experiencing ignition failure, short-cycling, or a lockout condition, a malfunctioning pressure switch is a common cause. Replacing a faulty switch helps restore reliable operation and ensures that your heating equipment operates safely by preventing the buildup of combustion gases.
Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.
1-778-759-9864Mon–Sat 8AM–9PM PST · Or email parts@bcfurnace.com
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