Fenwal 35-665576-111 Ignition Module 321702-401 By keeping the sump warm

By keeping the sump warm

Can I shorten the capillary tube if it is too long

Safety-First Design: Redundant solenoid coils provide an extra layer of protection by ensuring positive shut-off if power is lost

and V5197 Series gas valves

Common Questions How do I verify the sensor's health in the field

Fenwal 35-665576-111 Ignition Module 321702-401 By keeping the sump warmThe 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,