Armstrong Fluid Technology 8426401-006 Gasket 321894-709 This furnace limit switch is

This furnace limit switch is an essential "high-limit" safety device that protects the heat exchanger and prevents hazardous conditions in residential HVAC systems

Thermal Protection: Integrated automatic overload protection prevents winding failure during voltage fluctuations or mechanical jams

Rated for 208/230V operation

Direct OEM Compatibility: Engineered as a drop-in Fasco D9623 mechanical replacement for Nordyne 6210806

contractors ensure the electrical integrity and mechanical timing of the pressure-seated valve assembly remain within factory specifications

Armstrong Fluid Technology 8426401-006 Gasket 321894-709 This furnace limit switch isThe Armstrong Fluid Technology 8426401 006 Gasket is a critical OEM pump replacement part engineered for high performance sealing in commercial hydronic systems. This 11. 5 inch nitrile gasket (Buna N) is designed specifically for Armstrong S & H Series pumps and Design Envelope fluid handling units. Nitrile construction ensures superior resistance to petroleum based oils, water, and common glycol based heat transfer fluids, maintaining seal integrity