Lennox 49L89 - (49L8901) Limit Control (STILT), Actuates at 150°F, Resets at 120°F, Tan Sleeve, 3" Overall Length
The Lennox 49L89 (49L8901) Limit Control (STILT) is a precision-engineered temperature control switch designed to safeguard HVAC systems from unsafe operating conditions. As a critical safety component, this limit switch helps maintain safe temperature thresholds by interrupting power when excessive heat is detected in the furnace or air handler compartment.
This model is calibrated to actuate at 150°F, opening the electrical circuit and stopping heat generation once this threshold is exceeded. Once the temperature safely drops to 120°F, the switch automatically resets, restoring continuity and allowing system operation to resume without manual intervention. This automatic reset feature supports consistent and maintenance-free protection in day-to-day HVAC operation.
Product Specifications:
- Type: Limit Control – STILT (Surface Mount)
- Part Number: 49L89 / 49L8901
- Actuation Temperature: 150°F
- Reset Temperature: 120°F (automatic reset)
- Overall Length: 3 inches
- Sleeve Color: Tan – color-coded for easy identification
- Mounting Style: Board or surface mount design for universal Lennox compatibility
- Application: Over-temperature protection for residential and light commercial Lennox systems
Typical Applications:
- High-limit temperature cutoff for gas furnaces
- Supplemental thermal protection for air handlers
- OEM replacement in Lennox packaged units and split systems
Reliable, Factory-Approved Performance
As an original Lennox component, the 49L89 limit switch is rigorously tested to ensure accurate thermal sensing and long-term reliability. It seamlessly integrates with compatible Lennox models, preserving warranty compliance and system performance.
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