Doing so can lead to heat exchanger fatigue

If you are experiencing seat leakage or inconsistent flow control despite a functioning actuator

Safety Integrity: Acts as an essential fail-safe to cut power to the gas valve if airflow is restricted or temperatures exceed safe limits

This "E" series spring is specifically dimensioned for the 325-5 and 325-5A regulators

If the millivolt output drops below the required threshold

Armstrong Furnace R44992-001 Sensor Ignitor Doing so can lead toThe Armstrong Furnace R44992 001 Sensor Ignitor is a critical OEM replacement component designed for high efficiency gas furnaces. This dual purpose assembly functions as both a hot surface igniter and a flame sensor, ensuring precise ignition sequences and reliable flame rectification. Engineered for high temperature durability, the R44992 001 provides the resistance required for consistent heating cycles while maintaining the millivolt signal