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Serviceable Design: The internal color indicator element is replaceable using a Sporlan K-SA-4 kit
In a normally open configuration
or emergency troubleshooting when power is unavailable
a different OEM part number must be used to ensure correct orifice sizing and pressure regulation
Perform a phase-to-phase resistance check on the motor pins
Lennox 17U20 Pressure Switch 320720-756 Serviceable Design: The internal colorThe 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
US$ 149.00
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