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making it a critical replacement motor for maintaining system head pressure during peak load conditions
making it a versatile LP gas valve kit for field-conversions where natural gas is unavailable
For technicians performing HVAC diagnostics
making it ideal for commercial refrigeration defrost cycles or ventilator fan control
managing ignition sequences
Lennox 11U72 Pressure Switch 340155-7026 making it a critical replacementThe 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