
SHL524 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $15.99 | Condition is New, Supco SHL524 Gas Furnace Limit Thermostat Open 170, Close 150, 47-21711-10, FREE SHIPPING | 100.0% |
![]() | $19.32 | Condition is New, Supco SHL524 Plenum Limit Thermostat Thermodisc L170-20, FREE SHIPPING | ![]() |
![]() | $11.40 | Condition is New, Supco SHL524 Open L170-20 Limit Switch, shipping cost = $12.50 | ![]() |
![]() | $33.33 | Top Pick! Condition is New, Supco SHL524 Open L170-20 Limit Switch - High Performance Industrial Device, FREE SHIPPING | ![]() |
![]() | $37.51 | Condition is New, Supco SHL524 Plenum Thermostat, 2.80" Height, 1.88" Width, 7" Length, 150 Degree, FREE SHIPPING | 98.6% |

Introducing the SUPCO SHL524 Furnace Plenum Thermostat, a reliable and efficient solution for your Lennox or Rheem heating system. Designed specifically for the Lennox RHEEM 47-21711-10 model, this thermostat delivers accurate temperature control and consistent comfort for your home.
The SHL524 is a 5-1/2 inch high, 2-wire thermostat that is designed to be installed in the plenum of your furnace. It features a large, easy-to-read digital display that shows both the current temperature and the set temperature. The display is backlit, ensuring that you can easily view the settings even in low-light conditions.
This thermostat is equipped with Smart Response Technology, which quickly learns your temperature preferences and adjusts the heating system accordingly. It also features a "hold" function, allowing you to manually override the temperature settings for up to 12 hours.
The SHL524 is compatible with both gas and oil furnaces, and it is designed to work with both single-stage and two-stage heating systems. It is also compatible with most air conditioning systems, making it a versatile option for your home comfort needs.
The thermostat is easy to install and includes clear instructions and all necessary hardware. It is also covered by a limited 5-year warranty, ensuring that you can trust in its durability and reliability.
In summary, the SUPCO SHL524 Furnace Plenum Thermostat is a high-performance and reliable option for homeowners with Lennox or Rheem heating systems. With its accurate temperature control, easy-to-use features, and compatibility with various heating and cooling systems, it is an excellent choice for maintaining consistent comfort in your home.
The Supco SHL524 furnace plenum thermostat is a compatible option for Lennox and Rheem models with the part number 47-21711-10. Here are some pros and cons that might help you make an informed decision about purchasing this thermostat:
Pros:1. Compatibility: This thermostat is specifically designed to work with the Lennox and Rheem 47-21711-10 models, ensuring a proper fit and function.
2. Energy Savings: The SHL524 offers energy savings features such as a programmable temperature schedule, which can help reduce heating costs.
3. Convenience: With features like a large, easy-to-read display and simple programming, this thermostat offers added convenience for homeowners.
4. Durability: The SHL524 is built with high-quality materials and is designed to withstand the rigors of frequent use, making it a reliable choice.
Cons:1. Cost: Compared to some basic thermostats, the SHL524 may be more expensive due to its advanced features and compatibility with specific furnace models.
2. Installation: While the thermostat itself is not overly complex to install, some homeowners may prefer to hire a professional to ensure proper installation and functionality.
3. Limited Compatibility: The SHL524 is designed specifically for the Lennox and Rheem 47-21711-10 models, which may limit its appeal for those with different furnace brands or models.
In conclusion, the Supco SHL524 furnace plenum thermostat offers several advantages, including energy savings, convenience, and durability. However, its specific compatibility with the Lennox and Rheem 47-21711-10 models and higher cost compared to basic thermostats may be disadvantages for some homeowners. Ultimately, the decision to purchase this thermostat depends on your individual heating needs, budget, and comfort preferences. If you own a Lennox or Rheem furnace with the specified part number and are looking for a programmable, energy-saving thermostat, the Supco SHL524 could be a worthwhile investment.
Details:
Remove mounting screws and disconnect wire terminals. Brand new unused and ready to install.: : oem-compatible replacement for lennox gas furnaces. Engineered to replace lennox part number 47-21711-10, this high-limit switch interrupts burner operation when internal temperatures exceed safe thresholds.
Durable construction with secure mounting tabs. Installation tips:: disconnect power and shut off gas supply before servicing. Built to oem specifications, it ensures reliable thermal protection and consistent performance in residential light commercial gas furnaces. Locate the existing limit thermostat on furnace heat exchange or plenum.
Fits model's: : compatible with select lennox gas furnace model's. Furnace plenum thermostat for lennox, rheem, 47-21711-10, SHL524: $21.84: gas limit SHL524 replaces lennox 47-21711-10 oem-compatible: protect your furnace from overheating with this brand-new gas limit thermostat. Opens at designated high-limit temperature to prevent overheating. Install new thermostat in the same orientation and reconnect wires securely.
Restore power and gas, then test furnace operation safety cutoff. Replaces part numbers:: 47-21711-10. Compact design for easy replacement and universal fit.
specifications centrafurn:
- brand: Supco
- mpn: Shl524
- type: Furnace Plenum Thermostat
- material: Metal
- color: White
- country of origin: Mexico
- item width: 7.000
- item height: 6.000
- upc: 687152219681
general centrafurn:
- category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces
payments centrafurn:
- wallet: paypal
- credit card: visa
- other
shipping centrafurn:
- type: calculated
- transit: 4-7 days
- carrier: usps, ups
- class: standard, expedited
- service: usps ground advantage, ups ground, ups 2nd day air, usps priority mail
returns centrafurn:
- policy: returns accepted
- method: money back
- time: 30 days
- paid by: seller
seller centrafurn:
- rating: 99.6%
- # reviews: 333552
- city: baldwinsville, new york
offer centrafurn:
- sold #: 6
- options: ship-to-home
- started: april 23, 2026
- availability: in stock
- in stock #: 5
- prices: $11.40–$37.51
- item condition: New
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