Mini Nitride Hot Surface Igniter for Domestic Furnaces, SSN21

SSN21 Mini Nitride Hot Surface Igniter | 95V | OEM‑Compatible

Brand new SSN21 Mini Nitride Hot Surface Igniter engineered for domestic furnaces. Designed for fast ignition and long service life, this silicon nitride igniter is an ideal replacement for aging or failing igniters in Lennox®, Armstrong®, Coorstek®, and Ducane® heating systems.

️ Product Highlights

• Voltage: 95 VAC
• Amp Draw: 0.3 to 0.8A @ 95 VAC
• Time to Temp: 20 seconds
• Resistance: 50–450 Ohms @ 77°F (25°C)
• Material: Silicon Nitride — high heat resistance & long life
• Plug Type: 2‑prong Molex connector
• Condition: Brand New – Unused

Replaces These Part Numbers

75M21
483396

✅ Compatible Brands

• Lennox
• Armstrong
• Coorstek
• Ducane

️ Common Fixes

• Furnace failing to ignite
• Intermittent ignition or delayed startup
• Igniter cracked, worn, or not heating
• Frequent cycling without flame

️ Installation Tips

• Disconnect furnace power before servicing
• Handle igniter carefully — silicon nitride is durable but can still crack
• Avoid touching heating element with bare hands
• Transfer wiring one connector at a time
• Verify proper gap and alignment before reassembly

Restore fast, reliable ignition performance with this OEM‑compatible SSN21 Mini Nitride Hot Surface Igniter.