Lochinvar & A.O. Smith 100109929 Ignition Module 320788-704 Enhanced Durability: Constructed with high-grade

Enhanced Durability: Constructed with high-grade materials to withstand the thermal stress common in electric heat strips

This is the manufacturer-authorized updated version for the 9003626005

including the FBF and NTG series

This model features a built-in transformer and a single-pole double-throw (SPDT) auxiliary switch for integrated signaling

You must verify that your furnace model supports dual-stage firing to ensure the 24V signals are sent correctly to the high and low-stage solenoids

Lochinvar & A.O. Smith 100109929 Ignition Module 320788-704 Enhanced Durability: Constructed with high-gradeThe Lochinvar & A. O. Smith 100109929 Ignition Module is a critical Honeywell Intermittent Pilot Ignition (IID) control designed for precise pilot gas flow management and spark ignition timing. Engineered for high demand gas water heaters and HVAC systems, this direct replacement part (also identified as S8600M3001 or 9004544205) operates on a standard 24V 60Hz electrical loop. Field technicians rely on this module to ensure reliable flame sensing and