Lennox 18L49 – Lennox 105982-15 High Altitude Pressure Switch Kit, Actuates at 0.45 inch W.C.; Sungold Dot

The Lennox 18L49 (105982-15) High Altitude Pressure Switch Kit is engineered to maintain safe and reliable furnace operation in elevated-altitude environments. Designed to actuate at 0.45 inch W.C., this factory-approved Lennox replacement ensures proper combustion airflow monitoring when standard pressure settings are insufficient due to reduced atmospheric pressure. Ideal for restoring system performance, preventing furnace lockouts, and maintaining manufacturer-specified safety requirements.

Key Features
• High-altitude calibrated pressure switch kit
• Actuation point: 0.45 inch W.C.
• Supports stable combustion and ignition sequences
• Helps prevent nuisance shutdowns and error codes
• Direct Lennox OEM replacement for precise fit and function
• Sungold dot marking for identification

Specifications
• Part number: 18L49
• Manufacturer part: 105982-15
• Actuation pressure: 0.45 inch W.C.
• Application: high-altitude furnace adjustment
• Switch type: normally open until pressure threshold
• Includes required mounting components (as supplied by Lennox)

Compatible With
• Select Lennox residential gas furnace models
• Use only where high-altitude calibration is required per system specifications

Application Notes
• Installation should be performed by a qualified HVAC professional
• Verify model compatibility and altitude requirements before replacement
• Always follow manufacturer combustion setup procedures after installation

This genuine Lennox high-altitude pressure switch kit helps ensure safe and efficient furnace performance when operating above standard elevations, restoring proper airflow verification for dependable heating season after season.