OEM Lennox Hot Surface Ignitor — 70W16

The genuine OEM Lennox 70W16 hot surface ignitor is the component that lights your furnace's gas burners on every heating call. When the control board sends power, the ignitor heats to a glowing temperature and ignites the incoming gas. As one of the most frequently cycled parts in the furnace, it is a common wear item on compatible Lennox equipment.

A failing ignitor typically shows up as a furnace that runs its blower but produces no heat, an audible click with no ignition, or short cycling that ends in lockout. Visible cracks, blistering, or a dull element that no longer glows brightly are clear signs the ignitor has reached the end of its life and needs replacement.

Selecting the OEM Lennox 70W16 ensures the correct resistance, element material, and mounting bracket for your furnace, so it draws the proper current from the control board and reaches ignition temperature reliably. Generic ignitors often fail prematurely or overdraw the board — a factory-spec part protects your ignition system and restores dependable, on-demand heat.