Lennox 38M64 Pressure Switch 320788-702 Designed with a rugged brass

Designed with a rugged brass body and durable EPDM diaphragm

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

The unit provides a 0 to 10 VDC output signal

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

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

Lennox 38M64 Pressure Switch 320788-702 Designed with a rugged brassThe 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