LENNOX PRESSURE SWITCH 2-STG -0.50" WC / -0.90" WC Air Pressure Switch, Air Proving
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Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours
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This Lennox 2-stage air pressure switch is a vital safety component engineered for high-efficiency gas furnaces. As a dual-stage air-proving switch, it serves as a vacuum-sensing device that monitors the draft created by the inducer motor, ensuring combustion gases are safely vented before the ignition cycle starts. This specific model features two distinct pressure thresholds (-0.50" WC and -0.90" WC) to accommodate both low-fire and high-fire operation modes in multi-stage heating systems. If your furnace is cycling incorrectly, failing to ignite, or displaying pressure switch lockout error codes, this replacement switch restores reliable performance and ensures the appliance operates within safe manufacturer specifications. Built for precision and durability, it helps prevent the accumulation of hazardous flue gases by verifying proper airflow throughout the heating process.
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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