Note that this model features standard thermocouple threads and is not compatible with metric-threaded international valves

A functional Reznor high limit switch should show zero resistance (normally closed) at room temperature

Integrating this genuine Reznor part ensures system compatibility and restores the factory-specified safety sequence required for high-efficiency heating applications

pitted or burnt contact points

York S1-024-36052-009 Pressure Switch Note that this model featuresThe York S1 024 36052 009 is a high precision 0. 63" WC STDT pressure switch engineered for critical combustion safety monitoring in York HVAC systems. This OEM furnace pressure switch serves as a calibrated safety limit, monitoring the pressure differential within the draft inducer housing to ensure the vent system is clear and the blower is operating at the necessary static pressure for safe ignition. As a direct replacement for S1 024 25006 707,