Lennox 19D31 – Flame Sensor

The Lennox 19D31 flame sensor is a dependable OEM replacement component designed to ensure safe and reliable burner operation in residential and light commercial heating systems. This sensor monitors the furnace flame during ignition and normal operation, providing essential feedback to the control board to prevent unsafe conditions. It offers accurate flame detection, long-lasting performance, and easy installation for HVAC technicians and homeowners performing maintenance.

Features
• OEM flame sensor designed for Lennox heating systems
• Ensures proper flame detection for safe furnace operation
• Helps prevent ignition failures and system lockouts
• Durable construction for long service life
• Quick, straightforward replacement for maintenance and repairs
• Compatible with a wide range of Lennox furnace models

Specifications
• Part Number: 19D31
• Application: Furnace flame detection
• Material: High-temperature ceramic insulator with metal sensing rod
• Function: Confirms flame presence to furnace control board

Shipping Weight & Dimensions
• Weight: 0.10 lb (approx.)
• Dimensions: 5 in x 1 in x 1 in (package estimate)