Lennox X4148 Temperature Sensor High-pressure safety controls typically open

High-pressure safety controls typically open on a pressure rise

If the switch remains open while cool

though it purposefully excludes set point windows to prevent unauthorized adjustments and maintain system calibration integrity in high-traffic commercial or industrial environments

Enhanced Safety: Features a regulated 30s pre-purge period to clear the combustion chamber before each ignition attempt

Rotation is counter-clockwise (CCW) when viewed from the discharge side

Lennox X4148 Temperature Sensor High-pressure safety controls typically openThe Lennox X4148 Temperature Sensor is a high precision NTC (Negative Temperature Coefficient) thermistor designed for critical outdoor ambient monitoring. Engineered specifically for integration with Lennox Comfort Sense 5000 thermostats, including the X4146 and X4147 models, this sensor is essential for dual fuel HVAC systems. It provides the real time thermal data required for accurate staging and auxiliary heat lockout, ensuring the system toggles