Nordyne 632516R Pressure Switch 321042-401 The York S1-024-36138-000 Relay is

The York S1-024-36138-000 Relay is a heavy-duty 24V 60HZ DPST NO Relay designed for critical switching applications in residential and light commercial HVACR systems

The deep-seated threads and consistent hex sizing allow for proper torque application

Optimized Signal Distribution: Restores proper communication between the ICB (Integrated Control Board) and fan motors or gas valves

ensuring maximum heat conductivity

preventing the escape of combustion byproducts and ensuring consistent manifold pressure

Nordyne 632516R Pressure Switch 321042-401 The York S1-024-36138-000 Relay isThe Nordyne 632516R Pressure Switch is the direct engineering update for the legacy 632516 model, designed specifically for high efficiency gas furnaces within the Miller, Intertherm, and Nordyne families. This dual circuit 0. 50" PF 0. 40" PF differential switch monitors the pressure within the inducer housing and heat exchanger, ensuring the combustion process remains within safe operating parameters before allowing the ignition sequence to proceed.