Lennox 18L48 – High Altitude Pressure Switch Kit

Lennox 18L48 is a reliable high altitude pressure switch kit designed to ensure proper furnace operation in reduced-air-density environments. Featuring Lennox part number 105982-14, this switch actuates at 0.30" W.C. and includes the Wine Dot identifier for accurate model matching. It helps protect the HVAC system by ensuring correct draft and airflow verification during ignition cycles, reducing nuisance lockouts and improving long-term system performance.

This pressure switch is commonly used in high-altitude installations where standard switches may not function correctly due to lower atmospheric pressure. With durable construction and precise calibration, the 18L48 kit provides dependable operation for residential and light commercial gas furnaces.

Key features:
• High altitude pressure switch kit designed for reduced-air-density conditions
• Actuation set point: 0.30" W.C.
• Lennox part number 105982-14 with Wine Dot marking for compatibility assurance
• Helps maintain proper burner and inducer performance
• Prevents ignition issues caused by incorrect pressure levels
• Quick and straightforward installation for HVAC technicians
• Reliable Lennox OEM component for long-term system stability