the contacts should be normally open (no continuity)

Standardized Mounting: Features a universal flange design typical of Carrier

While primarily used in York HVAC units

When installing the Nordyne 1046638S

This genuine hydronic heating part provides the exact fitment and flow characteristics required to maintain secondary loop circulation and protect the boiler's heat exchanger from thermal stress

Watts F384440 Valve 319852-301 the contacts should be normallyThe Watts F384440 2 740 070 is a commercial grade pressure reducing valve component designed to maintain stable downstream water pressure in plumbing, hydronic, and HVAC systems. It is commonly used in larger commercial applications where consistent pressure regulation is critical for protecting piping, valves, pumps, and connected equipment. In field service, pressure reducing assemblies like this help prevent excessive line pressure, water hammer,