and 220J models

000 BTU) valve

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

Integrated compressor short cycle protection extends compressor lifespan

System Protection: Acts as a robust pre-filter

Lennox 17U20 Pressure Switch 321894-709 and 220J modelsThe 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