Automatic Recovery: The auto reset mechanism minimizes service calls after temporary overheating events

providing a direct-fit solution for technicians servicing Lennox GCS16 and GCS20 series units

This 180-degree manual reset thermal safety switch is engineered to de-energize the burner circuit when it senses dangerous heat from blocked flues

Use extreme caution and ensure power is disconnected before inspecting the 1173828 ignitor or sparker lead

This configuration allows field technicians to establish a customized deadband

Robertshaw 780-787 Ignition Module 30067439-890 Automatic Recovery: The auto resetThe Robertshaw 780 787 Ignition Module is a professional grade Hot Surface Ignition (HSI) Control engineered for high reliability performance in gas fired heating systems. This specific unit is a direct replacement for the HS780 34NR 306A, maintaining exact electrical and mechanical specifications for seamless field installation. Operating on a 120V AC supply voltage with a 24V AC control input, this module features a 34 second ignitor warm up period