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Description
52W29 Furnace Flame Sensor Replacement - For Lennox Armstrong & Ducane Furnaces52W29 Furnace Flame Sensor Key Features Monitors burner flame to ensure safe furnace operation. Direct replacement for the original manufacturer's part. Overall length: 5. 25 inches. Sensing rod length: 2. 75 inches. Constructed with a high temperature resistant metal rod and ceramic insulator. Replaces Cross Reference Part Numbers 52W29 52W2901 31L71 31L7101 LB 74940A 28PV41 903600 FLS52W29 Compatibility & Fitment Fits specific gas furnace models
52W29 Furnace Flame Sensor
Key Features
- Monitors burner flame to ensure safe furnace operation.
- Direct replacement for the original manufacturer's part.
- Overall length: 5.25 inches.
- Sensing rod length: 2.75 inches.
- Constructed with a high-temperature resistant metal rod and ceramic insulator.
Replaces / Cross-Reference Part Numbers
- 52W29
- 52W2901
- 31L71
- 31L7101
- LB-74940A
- 28PV41
- 903600
- FLS52W29
Compatibility & Fitment
- Fits specific gas furnace models from Lennox, Armstrong, and Ducane.
- Compatible with furnace series including G40, G41, G50, G51, G60, G61, and G71.
When to Replace
- Furnace ignites but shuts down after a few seconds.
- Furnace fails to heat consistently or at all.
- The sensor rod is visibly corroded, cracked, or has heavy carbon buildup that cannot be cleaned.
Installation Tips
- Disconnect all electrical power to the furnace before servicing.
- Handle the component by its metal bracket to avoid damaging the ceramic insulator.
- Ensure the sensor rod is properly positioned in the flame path for correct operation.
- Verify a secure wire connection before restoring power.
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
4.8 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Great For Puppy to Elderly Dogs
Flavor Name: Chicken, Size: 9.7 Ounce (Pack of 1)
All 3 of our dogs love this treat, We like that the treats are free of rawhide. They are soft enough for even our 15 year old dog to enjoy. The treats can easily be cut into pieces to use as training treats or to hide in dog puzzle toys. With 50 sticks per bag, we don't run out of them too soon.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 4
Good Treats, But Too Small for Large Dogs
Flavor Name: Chicken, Size: 9.7 Ounce (Pack of 1)
I purchased these DreamBone Twist Sticks for my large dogs. They had no problem eating them, but the treats were much smaller than I expected for bigger breeds. Because of the size, they didn't last very long and weren't as exciting for them as some of the other chews I've purchased.
That said, the dogs did eat them, and the quality seemed good. My dogs can be pretty picky, so their lack of enthusiasm may have had more to do with their preferences than the product itself. I think these would be a great option for small or medium-sized dogs, or as a quick treat rather than a long-lasting chew.
Overall, a decent product, just not the best fit for my large dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
★★★★★ 5
Excellent quality and value for the price!
Flavor Name: Chicken, Size: 9.7 Ounce (Pack of 1)
I am very pleased with this purchase! Great quality and value. I should have purchased them a long time ago.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Great for older and small dogs
Flavor Name: Chicken, Size: 9.7 Ounce (Pack of 1)
Healthy snack for the pups! I have an Oder dog and small dog both are able to enjoy these treats! They are hard enough to get some chews but soft enough to chew completely before swelling!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
Easy to Digest!
Flavor Name: Chicken, Size: 9.7 Ounce (Pack of 1)
My little dog loves these. They are easy for him to eat and he begs for them every day. They are safe to consume and he enjoys them as a special treat. Every day is special to him!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
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