
FLS51M14 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $15.00 | Condition is New, SUPCO HSI FLAME SENSOR (LENNOX 51M14 REPLACEMENT) FLS51M14, shipping cost = $5.25 | 99.4% |
![]() | $21.86 | Top Pick! Condition is New, FLS51M14 - Supco 2.5'' Flange to Tip Furnace Flame Sensor, FREE SHIPPING | 99.3% |
![]() | $29.02 | Condition is New, Supco Furnace Flame Sensor, 2.5" Flange to Tip, FLS51M14, FREE SHIPPING | 99.4% |
![]() | $33.30 | Condition is New, Supco FLS51M14 Flame Sensor, FREE SHIPPING | 98.5% |

Introducing the SUPCO FLS51M14 Flame Sensor Rod, an essential component for ensuring the safe and efficient operation of your Lennox Ducane Armstrong 51M14 and 51M1401 furnaces. This flame sensor rod is meticulously designed to detect the presence of a flame in the combustion chamber and trigger the gas valve to deliver fuel for continued burning.
The SUPCO FLS51M14 is manufactured using high-quality, ceramic material, which provides excellent durability and resistance to the harsh conditions within the furnace. Its compact design ensures a snug fit in the combustion chamber, minimizing the risk of gas leaks and enhancing overall system performance.
This flame sensor rod features a sensitive, negatively temperature-coiled sensor element, which optimally responds to the presence of a flame. When a flame is detected, the sensor's resistance decreases, allowing the electrical circuit to complete, enabling the gas valve to open and continue the fuel supply. Conversely, when no flame is detected, the sensor's resistance increases, preventing the gas valve from opening and maintaining safety within the system.
Designed with ease of installation in mind, the SUPCO FLS51M14 comes with a pre-attached, high-temperature, ceramic insulator, eliminating the need for additional components or assemblies. This time-saving feature ensures a quick and hassle-free installation process, reducing downtime and increasing overall system efficiency.
In summary, the SUPCO FLS51M14 Flame Sensor Rod is an indispensable component for your Lennox Ducane Armstrong 51M14 and 51M1401 furnaces, providing unparalleled safety, durability, and performance. Its high-quality ceramic construction, sensitive sensor element, and pre-attached insulator make it an excellent choice for maintaining the optimal operation of your gas furnace.
The SUPCO FLS51M14 flame sensor rod is a crucial component for the proper functioning of Lennox Ducane Armstrong 51M14 and 51M1401 furnaces. Here are some pros and cons of buying this flame sensor rod to help you make an informed decision:
Pros:1. OEM Component: This flame sensor rod is a genuine replacement part manufactured by Sensco Products, Inc., which is the original equipment manufacturer (OEM) for Lennox.
2. Improved Performance: A faulty flame sensor can cause the furnace to malfunction or fail to ignite. Replacing it with a new one can improve the overall performance of the furnace.
3. Long-Lasting: The SUPCO FLS51M14 flame sensor rod is designed to last longer than aftermarket sensors, ensuring fewer replacements over time.
4. Easy Installation: The flame sensor rod is easy to install, requiring only a few simple steps.
Cons:1. Cost: The SUPCO FLS51M14 flame sensor rod is more expensive than aftermarket sensors. However, its longer lifespan and improved performance may offset the initial cost.
2. Availability: This flame sensor rod may not be readily available at local hardware stores, and you may need to order it online from authorized Lennox dealers or parts distributors.
3. Time: If you're not comfortable installing the flame sensor rod yourself, you may need to hire a professional technician, which can add to the overall cost and time.
In conclusion, the SUPCO FLS51M14 flame sensor rod is a reliable and long-lasting solution for replacing a faulty flame sensor in your Lennox Ducane Armstrong 51M14 or 51M1401 furnace. While it may be more expensive than aftermarket sensors, its superior performance and extended lifespan can save you money and hassle in the long run. If you're comfortable performing the installation yourself or if you have easy access to an authorized Lennox dealer or parts distributor, this flame sensor rod is a worthwhile investment.
Details:
specifications maxohvac:
- brand: Supco
- mpn: Fls51m14
- model: 51m14 51m1401
- type: Flame Rod
- upc: 687152266579
- country/region of manufacture: China
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
seller maxohvac:
- rating: 99.1%
- # reviews: 2999
- city: navarre, ohio
payments maxohvac:
- wallet: google-pay
- credit card: diners-club
- other
returns maxohvac:
- paid by: buyer
- policy: returns accepted
- method: money back
- time: 30 days
shipping maxohvac:
- carrier: usps
- transit: 4-9 days
- service: usps ground advantage
- type: fixed
- class: standard
offer maxohvac:
- sold #: 16
- prices: $15.00–$33.30
- item condition: New
- options: ship-to-home
- availability: in stock
- started: september 7, 2025
- in stock #: 4
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