Lennox 18L41 (Lennox 105982-12) High Altitude Pressure Switch Kit is a genuine OEM replacement component designed to ensure safe and reliable furnace operation in high-altitude installations. This pressure switch kit is specifically calibrated to actuate at 0.75 inches water column (W.C.), allowing the furnace control system to properly verify inducer airflow and venting performance where reduced air density is present.

This high altitude pressure switch features the factory-identified yellow dot for quick and accurate identification during service or replacement. It is engineered to meet Lennox specifications, ensuring correct electrical response, precise pressure calibration, and long-term reliability. Using the correct high altitude pressure switch is critical for preventing nuisance lockouts, improper ignition sequences, and potential safety shutdowns in elevated environments.

The Lennox 105982-12 pressure switch kit is commonly used in Lennox gas furnaces configured for high-altitude operation and is intended to replace worn, damaged, or incorrectly calibrated switches. Installation of this OEM part helps restore proper furnace operation, maintains manufacturer performance standards, and supports compliance with applicable installation requirements.

This pressure switch kit is ideal for HVAC technicians, contractors, and service professionals performing furnace repairs or altitude-specific conversions. As a genuine Lennox replacement part, it provides dependable performance, precise actuation, and compatibility with approved Lennox systems.

 

Key features:

Calibrated for high altitude applications
Actuates at 0.75" W.C.
Yellow dot for easy identification
Genuine Lennox OEM replacement part
Supports proper furnace safety and airflow verification

 

Lennox 18L41 / 105982-12 High Altitude Pressure Switch Kit is the correct choice for maintaining safe, efficient, and reliable furnace operation in high-altitude installations.