Lennox 38M64 Pressure Switch 320788-702 Cold Climate Reliability: Essential for

Cold Climate Reliability: Essential for systems operating in low-ambient environments where cold-start damage is a frequent concern for contractors

while the TWN75 rating specifies suitability for wet or damp locations at a maximum of 75°C

ensuring rigorous performance in power boiler applications

maintaining alignment and calibration over extended duty cycles without the frequent need for field adjustments

specifically engineered for York

Lennox 38M64 Pressure Switch 320788-702 Cold Climate Reliability: Essential forThe Lennox 38M64 Pressure Switch is a critical safety component designed for precise draft pressure monitoring in residential and commercial HVAC systems. This OEM Lennox furnace part is factory calibrated to a set point of 1. 95" WC (Water Column), providing the exact differential pressure required to verify inducer motor operation and flue gas venting. Engineered as a direct replacement for Lennox 38M6401, this component ensures your furnace or air