Lennox 12Y80 Sequencer 322057-301 and process fluid monitoring

and process fluid monitoring

Utilizing a genuine York replacement part ensures the bypass and safety loops remain intact

or intended for use as a life-safety gas detector or smoke warning device

thermopile voltage

Lennox 12Y80 Sequencer 322057-301 and process fluid monitoringThe Lennox 12Y80 Sequencer (OEM part number 104284 03) is a critical thermal sequencer relay used to manage staged heating in Lennox electric furnaces and air handlers. As a DPDT normally open component, it acts as a timing controller for 24V circuits, ensuring that heating elements and blower motors activate in a staggered sequence. This staged operation is vital for preventing massive inrush current and potential electrical overload on the job site.