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Description
69W43 Furnace Flame Sensor - For Lennox, Armstrong & Ducane Furnaces - Replaces 69W4301 LB-74940B LB74940B - 2 Pack69W43 Furnace Flame Sensor Key Features Detects burner flame to enable safe and continuous furnace operation. Constructed with a durable cermet insulator and a corrosion resistant sensing rod. Angled probe design for direct replacement and optimal positioning. Replaces Cross Reference Part Numbers 69W43 69W4301 LB 74940B LB74940B 102431 02 790 801A1 Compatibility & Fitment Designed as a direct replacement part for specific furnace models from: Lennox
69W43 Furnace Flame Sensor
Key Features
- Detects burner flame to enable safe and continuous furnace operation.
- Constructed with a durable cermet insulator and a corrosion-resistant sensing rod.
- Angled probe design for direct replacement and optimal positioning.
Replaces / Cross-Reference Part Numbers
- 69W43
- 69W4301
- LB-74940B
- LB74940B
- 102431-02
- 790-801A1
Compatibility & Fitment
- Designed as a direct replacement part for specific furnace models from:
- Lennox
- Ducane
- Armstrong
- Note: Always confirm compatibility by checking your equipment's service manual and part number.
When to Replace
- Furnace ignites but shuts down after a few seconds.
- Burner flame will not stay lit.
- Visible damage, such as a cracked porcelain insulator on the existing sensor.
- Heavy carbon buildup or corrosion on the sensor rod that cleaning does not resolve.
Installation Tips
- Disconnect all electrical power to the furnace unit before beginning installation.
- Handle the new sensor by the porcelain base to avoid contaminating the metal rod with skin oils.
- Ensure the sensor rod is properly positioned to be enveloped by the burner flame during operation.
- Inspect the connecting wire for damage and ensure a secure connection.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy