making it a critical replacement HVAC sensor for maintaining setpoint accuracy

As the direct replacement for Fenwal 27121-0-325

which should be torqued to 95 in-lbs for optimal seating

Serviceability: The manual ON/OFF switch and LED status indicator allow for immediate power isolation and visual diagnostics

Ensure the PTFE glass seals are properly seated and avoid over-tightening

Fenwal 35-630500-007 Module 321702-401 making it a critical replacementThe Fenwal 35 630500 007 Ignition Module is a high performance 24 VAC intermittent pilot ignition control engineered for precision in gas fired furnaces, boilers, and unit heaters. This microprocessor based module replaces legacy analog systems, utilizing DETECT A FLAME technology for reliable flame rectification and safe start up. Operating with a 90 second Trial for Ignition (TFI) and 0 second pre purge, it ensures immediate response upon a call for