Lennox 70W16 Hot Surface Igniter – OEM Replacement Ignitor for Gas Furnaces.

Product Overview

The Lennox 70W16 Hot Surface Igniter is a genuine OEM silicon carbide ignitor engineered to deliver fast, reliable burner ignition in compatible Lennox gas furnaces. Built to Lennox factory standards, this ignitor directly replaces worn or failed components that commonly cause ignition lockouts, delayed startups, and furnace no-heat issues.

Designed for modern pilotless furnace systems, the 70W16 heats rapidly to ignite the burners without a standing pilot. With a factory-style plug connector and durable construction, it installs easily and restores dependable heating performance.

Features & Benefits

• Genuine OEM Lennox replacement ignitor.
• High-temperature silicon carbide construction for long life.
• Direct hot-surface ignition—no pilot light required.
• Fast warm-up time ensures consistent burner ignition.
• Easy plug-in connector for quick installation.
• Helps resolve ignition failures and lockout conditions.
• Engineered to Lennox factory specifications.

Specifications

• Part Number: 70W16
• Alternate Parts: LB-112237B, 100536-03, LXT-03
• Component Type: Hot Surface Igniter
• Material: Silicon carbide
• Application: Lennox gas furnaces
• Connection: Factory-style plug-in harness
• OEM: Yes

Installation Tips

• Turn off furnace power before replacing the ignitor.
• Do not touch the ignitor element with bare hands—use gloves.
• Verify proper burner alignment before tightening the bracket.
• Check furnace control board output to prevent future failures.
• Run a full heating cycle after installation to confirm ignition.

FAQs

1. What does this ignitor do?
   It heats quickly to ignite the furnace burners without a pilot flame.
2. Is this an OEM part?
   Yes, this is a genuine Lennox OEM ignitor.
3. What part numbers does it replace?
   LB-112237B, 100536-03, LXT-03.
4. What problems does it fix?
   Ignition failures, misfires, delayed ignition, and lockout codes.
5. Is installation simple?
   Yes—most units feature a quick plug-in connection for easy replacement.