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Lennox 99M78 Auto Limit Switch 110°F-130°F

Special Price $25.97 Regular Price $33.76
In stock
The Lennox 99M78 Auto Limit Switch is a crucial component in HVAC systems, designed to regulate and maintain safe operating temperatures. This switch activates or deactivates heating elements based on the surrounding temperature, ensuring optimal performance and preventing overheating. It operates within a temperature range of 110°F to 130°F, making it suitable for a variety of heating applications. Commonly used in Lennox furnaces and heating units, the auto limit switch enhances system reliability and safety. With precise temperature control, it contributes to energy efficiency and extends the lifespan of HVAC equipment. Compact and lightweight, the switch measures units and weighs only 0.07 lb, facilitating easy installation and integration into existing systems.


  • Measure: Units
  • Weight: 0.07lb
  • Temperature: 110°F-130°F
Manufacturer Name: Lennox
Product Number: 99M78
OEM Part Number: 99M78
Product Description: 110-130F Auto Limit Switch

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