York S1-024-21678-700 Relay Is the 100208306 indicator light

Is the 100208306 indicator light interchangeable with 120V models

The LED is wired in parallel with the coil

You must match the voltage of the control circuit

while frequently cited for the D1NA series

Professional construction ensures long-term structural integrity in harsh industrial environments

York S1-024-21678-700 Relay Is the 100208306 indicator lightThe York S1 024 21678 700 is an OEM 24V SPDT Relay designed for heavy duty switching in residential and commercial HVAC control systems. This component serves as the direct 024 21678 000 replacement, ensuring seamless integration into existing control boards without requiring circuit modifications. Engineered with a 24VAC 50 60Hz coil, this Single Pole Double Throw relay provides the necessary electrical isolation between low voltage thermostat