Lennox 17U20 Pressure Switch 320720-756 a different OEM part number

a different OEM part number must be used to ensure correct orifice sizing and pressure regulation

Superior Compatibility: Direct physical and electrical upgrade for the obsolete 90-162

This critical OEM replacement part is a 1/4" NPT outlet thermistor designed to provide precision temperature data to the Smart System control module

Perform a phase-to-phase resistance check on the motor pins

Lennox 17U20 Pressure Switch 320720-756 a different OEM part numberThe Lennox 17U20 Pressure Switch is a high precision sensing component engineered for critical monitoring in residential and commercial HVACR systems. This OEM Lennox 104371 10 replacement part is designed to actuate at 1. 00 inch W. C., providing essential safety interlocking for furnace draft inducer motors and air handling units. Built with a sensitive diaphragm and a robust SPST N. O. contact configuration, it ensures the electrical circuit closes