
56M66 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $12.00 | Condition is New, Lennox 56M66 Limit Rollout Switch NOS, shipping cost = $6.58 | 100.0% |
![]() | $18.57 | Condition is New, Lennox 56M66 125-142F AUTO Limit Switch, FREE SHIPPING | 99.7% |
![]() | $22.51 | Top Pick! Condition is New, Lennox 56M66 125-142F AUTO Limit Switch Control, FREE SHIPPING | ![]() |
![]() | $24.78 | Condition is New, Lennox 56M66 125-142F AUTO Limit Switch 125-142F AUTO Limit Switch, FREE SHIPPING | 98.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $50.52 | Condition is Unspecified, Lennox 56M66 125-142F AUTO Limit Switch 125-142F AUTO Limit Switch, FREE SHIPPING | 98.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $42.63 | Condition is Used, Lennox 56M66, 56M6601 , L142-15F Draft Inducer Limit Switch, shipping cost = $ | 99.1% |

Introducing the Lennox 56M66 Limit Rollout Switch, a crucial component for ensuring optimal performance and safety in your HVAC system. This switch is meticulously engineered to provide reliable control over the heating and cooling functions in your Lennox furnace.
The Lennox 56M66 is a limit rollout switch, which is designed to protect your furnace from overheating. It does this by monitoring the temperature rise within the furnace and activating the rollout mechanism when the temperature exceeds safe limits. This mechanism then rolls out the igniter or other components to shut off the fuel supply and prevent further overheating.
This switch is built with high-quality materials and precise manufacturing techniques to ensure long-lasting durability and reliability. It features a robust design with a corrosion-resistant coating to protect against the harsh environments common in HVAC systems. The switch also includes a clear, easy-to-read indicator light, which illuminates when the limit switch has been tripped, alerting you to potential issues.
Installation of the Lennox 56M66 is straightforward and can typically be completed by a professional HVAC technician or a confident DIYer with some experience in working with electrical components. The switch is designed to fit and function seamlessly with Lennox furnaces, ensuring a smooth integration into your existing system.
In summary, the Lennox 56M66 Limit Rollout Switch is an essential component for maintaining the safety and efficiency of your Lennox furnace. Its robust design, reliable temperature monitoring capabilities, and easy-to-install features make it an excellent choice for both residential and commercial applications. Trust Lennox to provide you with the highest quality components for your HVAC system.
Lennox 56M66 Limit Rollout Switch: A Comprehensive Analysis
The Lennox 56M66 limit rollout switch is a vital component in HVAC (Heating, Ventilation, and Air Conditioning) systems. This switch is designed to provide safe and efficient operation by limiting the amount of refrigerant that flows into the compressor. In this analysis, we will discuss the pros and cons of purchasing a Lennox 56M66 limit rollout switch.
Pros:1. Enhanced Safety: This switch ensures safe operation by preventing the compressor from receiving too much refrigerant, which could lead to compressor damage and potential safety hazards.
2. Improved System Performance: By regulating the refrigerant flow, the limit rollout switch helps maintain optimal system performance, ensuring that the HVAC system functions efficiently and effectively.
3. Long-lasting Design: Lennox is a reputable brand known for manufacturing high-quality components. The 56M66 limit rollout switch is no exception, as it is designed to withstand harsh operating conditions and provide long-lasting service.
Cons:1. Cost: The Lennox 56M66 limit rollout switch may be more expensive than some aftermarket alternatives. However, the investment in a proven, reliable component may save money in the long run by reducing repair and replacement costs.
2. Availability: Depending on the location and specific HVAC system configuration, it may be challenging to find a local supplier or distributor that stocks this particular switch. In such cases, it might be necessary to order it online or through a specialized HVAC parts supplier.
Conclusion:The Lennox 56M66 limit rollout switch is an essential component for ensuring the safe and efficient operation of HVAC systems. While it may come with a higher price tag and potential availability concerns, the benefits of improved safety, system performance, and long-lasting design make it a worthwhile investment for both residential and commercial applications.
Recommendation:If you are in the market for a reliable limit rollout switch for your Lennox HVAC system, consider investing in the Lennox 56M66 model. Although it may require some effort to locate and purchase, the long-term benefits and peace of mind it provides make it a worthwhile investment for maintaining the optimal performance and safety of your HVAC system.
Details:
This new old stock nos product features the reliable Lennox brand and is specifically designed as a rollout switch for hvac systems. Where it fits examples of Lennox model's: g41uf-36c-090. G51mp-36c-090 / g51mp-60c-110. G43uf-36c-090 / g43uf-48c-110h.
The Lennox 56M66 limit rollout switch is a high-quality hvac and refrigeration component designed for industrial commercial use.
specifications maxohvac:
- brand: Lennox
- mpn: 56m66
- model: Lennox 56m66
- type: Rollout Switch
shipping maxohvac:
- service: usps ground advantage
- transit: 5-11 days
- class: standard
- carrier: usps
- type: calculated
payments maxohvac:
- wallet: paypal
- credit card: discover
- other
seller maxohvac:
- city: harrisonburg, virginia
- # reviews: 130
- rating: 100.0%
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
offer maxohvac:
- availability: in stock
- options: ship-to-home
- started: january 4, 2026
- prices: $12.00–$50.52
- item condition:
- New
- Unspecified
- Used
- in stock #: 5
- sold #: 9
returns maxohvac:
- policy: no returns
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