OEM Lennox Hot Surface Ignitor — 87X86

The genuine OEM Lennox 87X86 hot surface ignitor is the component that heats up and ignites the gas burners each time your furnace calls for heat. Precision-matched to Lennox furnaces, this ignitor is engineered to reach the exact operating temperature and resistance your control board expects, ensuring reliable, safe ignition cycle after cycle.

Hot surface ignitors are one of the most common furnace failure points. Watch for these warning signs that your 87X86 may be worn out: no heat despite the blower running, the furnace clicking but never lighting, a glowing element that cracks or fails to glow, or short-cycling on cold mornings. Because the silicon carbide (or silicon nitride) element is fragile and degrades with every heating cycle, replacement is a normal part of furnace maintenance.

Choosing an OEM Lennox part matters. Aftermarket ignitors often have mismatched resistance or mounting profiles that cause premature failure, nuisance lockouts, or improper flame sensing. The factory-spec 87X86 drops right into your Lennox unit for correct fit, timing, and long service life.