Lennox 11U66 Pressure Switch 320074-702 it ensures proper fitment and

it ensures proper fitment and maintains the original equipment’s narrow operating tolerances

the unit features an integrated combustion blower motor and housing designed to meet strict UL safety standards

For contractors servicing residential and light commercial air handlers

Universal Compatibility: Validated for use across a wide range of Lochinvar Knight boiler parts

Lennox 11U66 Pressure Switch 320074-702 it ensures proper fitment andThe Lennox 11U66 Pressure Switch is a critical safety component designed for precise draft monitoring in high efficiency gas furnaces and HVAC systems. As a genuine OEM replacement, this 0. 55" WC pressure switch is factory calibrated to actuate at 0. 55 inches of water column, ensuring the inducer motor is creating sufficient static pressure before the ignition sequence begins. Built by Cleveland Controls (MPN: 11U66 or 104371 03), this single pole