Robertshaw 780-845 Ignition Module Els PW 17895 it functions as a critical

it functions as a critical vent limit switch that interrupts gas flow if hazardous venting conditions or overheating are detected

and Q pilots

The Lennox 98M87 Flame Sensor (Catalog Number 98M87) is a critical OEM diagnostic component for Lennox furnace control systems

which is a critical safety component for preventing thermal runaway in the event of airflow failure

Does this valve require external equalization

Robertshaw 780-845 Ignition Module Els PW 17895 it functions as a criticalThe Robertshaw 780 845 Ignition Module is a veteran standard intermittent pilot ignition control engineered for reliability in gas fired heating systems. Designed as a versatile SP845 factory model, this 24V AC unit features solid state logic and flame rectification for precise automatic sequencing. It serves as the direct replacement for 100 00831 05 and 9004426105, effectively consolidating truck stock for service contractors. The module delivers 4