Helps maintain proper heat rejection and overall HVAC system efficiency

Durable Sealing: Viton (FKM) elastomers withstand fluid temperatures up to 230°F and provide excellent chemical compatibility

System Protection: Acts as a robust pre-filter

Designed for reliability at altitudes between 0 and 1

For technicians managing commercial or municipal water systems

Lennox 17U20 Pressure Switch 321894-709 Helps maintain proper heat rejectionThe 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