Fenwal 35-665576-111 Ignition Module 321702-401 Built for high-heat environments

Built for high-heat environments

the FS7-4WL is designed for installation in both horizontal and vertical upward-flow piping

Using genuine York HVAC parts ensures exact dimensional tolerances

Can I shorten the capillary tube if it is too long

The assembly is designed to facilitate the consistent updraft of combustion gases

Fenwal 35-665576-111 Ignition Module 321702-401 Built for high-heat environmentsThe Fenwal 35 665576 111 is a microprocessor based 120V HSI Control engineered for high reliability performance in residential furnaces, hydronic boilers, and commercial water heaters. This hot surface ignition module features a 20 second heat up time and a 4 second trial for ignition (TFI) period, ensuring precise sequencing for gas fired heating equipment. As an OEM grade replacement, it provides robust flame sensing using Detect A Flame technology,