Lennox 11U72 Pressure Switch 340155-7026 always verify the specific electrode

always verify the specific electrode geometry and mounting pattern against your model and serial number before installation

making it a critical replacement motor for maintaining system head pressure during peak load conditions

managing ignition sequences

making it a versatile LP gas valve kit for field-conversions where natural gas is unavailable

This valve is designed for use in two-pipe hot water and two-pipe low-pressure steam systems

Lennox 11U72 Pressure Switch 340155-7026 always verify the specific electrodeThe Lennox 11U72 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency gas furnaces. As a genuine OEM replacement part (also identified as Lennox 104371 09), this single pole, single throw (SPST) switch features a normally open contact configuration. It is factory calibrated to actuate at a 0. 90" WC (inches water column) set point, ensuring the draft inducer motor is generating sufficient