The unit requires a 24VAC power source

preventing capillary tube blockages and expansion valve fouling

this 5500-watt heat element offers the exact physical footprint and electrical tolerances required to maintain system static pressure and AHRI-rated performance without the need for extensive field modifications

using desiccant packs or proper drainage loops in the conduit can prevent moisture from bridging the gap between the sensing and ground wires

replacing this ignition wire set is the standard solution

Lennox 10U94 Pressure Switch 340793-762 The unit requires a 24VACThe Lennox 10U94 Pressure Switch is the OEM replacement for 103614 09, engineered specifically for high efficiency gas furnace applications. This SPST pressure switch is factory calibrated to a . 90" wc set point, providing critical safety monitoring of the inducer motor and venting system vacuum. Designed for Lennox, Armstrong, and Ducane units, it serves as a direct furnace air pressure switch replacement for several legacy components, including