ensuring stable performance across thousands of ignition cycles

preventing nuisance drop-outs in residential and commercial heating equipment

maintaining operational efficiency and safety on the job site

Ensure the switch is set back to 'Auto' after service to return control to the BAS

while the vibration-resistant adjusting screw maintains setpoints in demanding environments

Lennox 36N77 Hot Surface Ignitor ensuring stable performance across thousandsThe Lennox 36N77 Hot Surface Ignitor is a critical OEM replacement part designed for high performance gas fired combustion systems. Also identified by the identical part number 36N7701, this nitride ignitor is engineered to withstand extreme thermal cycling within residential furnaces and boilers. As a direct fit HSI, it ensures precise gas ignition by delivering a robust heat source that interfaces seamlessly with the furnace's integrated control