Lennox 12Y80 Sequencer 340155-7026 an "Open Low" or SPDT

an "Open Low" or SPDT model would typically be required

these HVAC ignition spring snaps deliver the mechanical integrity required for long-term operational stability and safety in professional thermal processing equipment

No Electricity Required: The piezo ignition system ensures the unit functions independently of the local power grid

Maintaining proper pressure monitoring with this HVAC pressure sensor is essential for protecting the heart of the cooling system and extending the service life of the equipment

the motor windings or bearings may have failed

Lennox 12Y80 Sequencer 340155-7026 an "Open Low" or SPDTThe 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.