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Broad Cross-Reference: Compatible with Allied Air
Verified Compatibility: Replaces worn seals in Carrier-family units
Universal Compatibility: Serves as a primary service replacement for numerous 710 series models
Key Benefits: Dual-Speed Versatility: Supports 2-speed operation for enhanced comfort and improved humidity control
Adjustable Airflow: Three discrete speed taps allow for precise tuning of heating and cooling CFM
Lennox 11U72 Pressure Switch 320819-301 Broad Cross-Reference: Compatible with AlliedThe 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