the switch or its diaphragm inlet hole may be clogged or defective

or failure to open due to worn elastomers or a bent plunger tube

Designed to integrate seamlessly with BMS systems and Fire Alarm Control Panels (FACP)

Service Professional FAQs:

while the polarity-insensitive two-wire configuration simplifies installation for contractors and HVAC technicians

Greenheck 386407 Ignition Control 322056-301 the switch or its diaphragmThe Greenheck 386407 Ignition Control is a critical direct replacement module designed to manage the startup and firing sequences for gas fired HVAC units and makeup air systems. This 24V ignition control switch (cross referenced with CLVLD DNS22 1590 00) is engineered for precise flame sensing and energy management, ensuring that the burner fires only under proven conditions. With integrated safety logic, this Greenheck electronic ignition module