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By regulating the frequency and voltage supplied to the motor
or emergency troubleshooting when power is unavailable
Perform a phase-to-phase resistance check on the motor pins
Superior Compatibility: Direct physical and electrical upgrade for the obsolete 90-162
In a normally open configuration
Lennox 17U20 Pressure Switch 320720-756 By regulating the frequency andThe 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
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