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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
4.5 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
The best makeup wipes
Size: 50 count (Pack of 1)
The best makeup wipes- soft and fast and they smell great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
★★★★★ 5
Just love these and they are sometimes hard to find.
Size: 50 count (Pack of 1)
These are great they make you skin feel fresh. They never irritate my face. Always you one before moisturizer.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
Work well, no bad skin reactions
Size: 50 count (Pack of 1), Size: 50 count (Pack of 1)
I can't believe what a great deal these are! It's less than $7 (as an add-on buy) for two packets. I had already bought this brand once before so I knew they'd work for me. They remove make-up pretty well. I don't think they are the very best of all time, but they are up there with the other brands I've tried. This product states that it has no artificial dyes or perfumes. These points are really important. Any fragrance that is added to beauty products can irritate your skin, which has happened to me in the past. I do detect the slightest scent, though. It's actually rather pleasant. I think there's still a slight residue of mascara left over after using the wipes pretty thoroughly, so I only gave them 4 stars. Your experience may differ as the packaging promises to remove all makeup residue. Maybe I'm not using them properly?
I have very sensitive skin and I didn't break out or otherwise react poorly to these. They do the job as well as I think can be expected for facial wipes so I bought them again. I really hope the claims to being simply formulated are true. I have a healthy scepticism of the beauty industry. My experience with these wipes has been positive so I will take it on faith that they live up to their advertising as far as having no unnecessary additives.
One more thing: I like the idea of the added vitamins. It always cracks me up when facial cleansers advertise the addition of helpful vitamins. How can they help when you're immediately rinsing them back off your face? The addition of any vitamins to regular liquid cleansers is just a waste. They do nothing for you. That being said, when they are added to facial wipes, they are spread on your skin and stay there, since you don't generally rinse after using wipes. In this way of cleaning, you may actually be reaping some benefit from the added vitamins.
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Reviewed in the United States on July 18, 2016
★★★★★ 5
facial wipes
Size: 25 Count (Pack of 6)
I love these facial cleansing wipes. I have been using them for years.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Love these!
Size: 50 count (Pack of 1)
Leaves my face feeling fresh and clean. Doesn't leave any type of film behind
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Reviewed in the United States on May 25, 2026