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This HVAC replacement part is the standard choice for technicians seeking a reliable
The durable construction is built to withstand the typical environment of an evaporator coil section
clogged return air filters
you need a reliable flame rollout switch that integrates seamlessly with existing safety circuits
York S1-024-21678-700 Relay This HVAC replacement part isThe 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