Product description

The Lennox H5889 Vacuum Switch is an indispensable safety device for modern furnaces and pellet stoves, designed to verify that combustion gases are being properly exhausted. This pressure-sensitive switch monitors the draft created by the inducer fan; if it detects a lack of vacuum pressure—which could indicate a blocked flue, a failing motor, or a broken vent pipe—it will immediately signal the ignition control to shut down the system. By preventing the stove from operating under unsafe venting conditions, this vacuum switch protects your home from dangerous carbon monoxide buildup. It features a sensitive diaphragm and precision-calibrated setpoints to ensure accurate monitoring of very small pressure changes. This Lennox-certified switch is a direct replacement for your original safety equipment, providing the peace of mind that comes with knowing your heating system is operating under constant, reliable supervision.

Product highlights

• Combustion Safety: Ensures the furnace only operates when a proper exhaust draft is present.
• Precision Monitoring: Highly sensitive diaphragm detects even minor changes in vacuum pressure.
• Prevents CO Leaks: Protects indoor air quality by shutting down the system during venting failures.
• Durable Housing: Designed to withstand the environment of a furnace's control cabinet.
• Lennox Certified: Built to the exact safety and performance standards of Lennox appliances.

Specs

• Component Type: Vacuum Switch
• Manufacturer: Lennox
• Manufacturer Part Number: H5889

Direct replacement models

Lennox H5889

You will receive the same product or an OEM-Equivalent that meets the highest standard of the OEM with warranty that will be a direct-fit. Manufactured with rigorous industry standards and certified in the USA with superior quality to the OEM.