Resideo Q4100C9046 Hot Surface Ignitor Maintains airtight combustion seals to

Maintains airtight combustion seals to prevent carbon monoxide leakage into the living space

technicians often use high-temp silicone RTV on cut surfaces or seams as specified in Lochinvar service manuals

specifically for Bard wall-mount units

The 5/16" diameter prevents the rod from bending under the torque generated by high-power spring-return actuators

preventing water ingress along the motor shaft that can lead to premature bearing failure or winding damage

Resideo Q4100C9046 Hot Surface Ignitor Maintains airtight combustion seals toHandle your next service call with the Resideo Q4100C9046, a field proven 120V silicon carbide hot surface igniter designed for maximum durability in gas fired furnaces and boilers. This high temp HSI replacement features a robust ceramic block rated for 392F (200C), ensuring stable performance in both natural gas and liquid propane (LP) applications. The 19 1 8" lead length provides ample slack for complex cabinet routing, while the stripped end