Flame Sensor fits Lennox Furnace, 69W43

Furnace Flame Sensor Replacement | Lennox® 69W43

Ensure safe and efficient furnace operation with this brand-new Exact Replacement Parts Flame Sensor, designed to replace Lennox® part number 69W43. This OEM-style flame sensor detects the presence of a burner flame during the ignition cycle and signals the control board that ignition was successful. Proper flame sensing helps prevent unsafe gas buildup, furnace shutdowns, and ignition failures while maintaining reliable heating performance.

⚙️ Product Features

• Direct replacement flame sensor for Lennox® furnaces
• Detects burner flame presence for safe furnace operation
• Helps prevent unburned gas buildup during the ignition cycle
• OEM-style fit and construction for dependable performance
• Helps reduce ignition failures and furnace lockouts
• Compatible with select Lennox® heating systems
• Condition: Brand New – Unused

Replaces OEM Part Numbers

69W43
AP7210626

Compatible Furnace Models

NF80D045S3A53 NF80D045S3A54 NF80D070S3A54 NF80D070S3B54 NF80D070T3A52 NF80D090S4B53 NF80D090T4B52 NF80D110S5C53 NF80L045S3A51 NF80L045S3A52 NF80L070S3A53 NF80L070S3B53 NF80L090S4B51 NF80L110S5C51 NF80U045S3A55 NF80U045T3A52 NF80U070S3A56 NF80U070S3B56 NF80U070T3A52 NF80U070V3A53 NF80U070V3A56 NF80U090S4B54 NF80U090T4B52 NF80U090V4B56 NF80U110S5C52 NF80U110T5C52 NF80U110V5C56 NF80U135S5D54 NF80U135S5D55 NF96D045S3B56 NF96D045S3B57 NF96D070S4B57 NF96D070V4B02 NF96D090S4C56 NF96D090S4C57 NF96D090V5C02 NF96D110V5C02 NF96U090S4C56 NF96U090S4C57 NF96U090V5C02 NF96U110S5C56 NF96U110S5C57 NF96U110V5C02 NF96U135V5D02 NF97D070M3B00 NF97D070M3B06 NF97D090M4C00 NF97D090M4C06 NF97D110M5C00 NF97D110M5C06 NF97U070M3B00 NF97U070M3B06 NF97U090M3C00 NF97U090M3C06 NF97U090M4C00 NF97U090M4C06 NF97U090M5C00 NF97U090M5C06 NF97U110M5C00 NF97U110M5C06 NF97U135M5D00 NF97U135M5D06

️ Common Fixes

• Furnace starts then shuts off shortly after ignition
• Intermittent heating operation
• Burner ignition failures
• Furnace lockout conditions
• No heat from furnace
• Flame is present but not detected by the control board

Product Specifications

• Part Type: Flame Sensor
• Application: Gas Furnace
• Function: Detects burner flame during ignition cycle
• Replacement For: Lennox® 69W43
• Condition: Brand New

️ Installation Tips

• Disconnect electrical power to the furnace before servicing
• Allow heating components to cool before handling
• Inspect the flame sensor mounting location for corrosion or debris
• Ensure all electrical connections are secure after installation
• Test furnace operation after replacement to verify proper flame sensing and heating performance

Restore dependable ignition safety, prevent nuisance shutdowns, and maintain reliable heating performance with this OEM-compatible flame sensor replacement for Lennox® 69W43 furnaces.