making it suitable for modern high-pressure systems including R-410A and R-134a

This mounting hardware is an essential component for any contractor upgrading legacy systems to modern System 350 or modular sequencer configurations where reliable DIN rail mounting is critical for long-term performance

The MARS 11952 Start Capacitor is a high-duty round motor start capacitor engineered for single-phase HVACR and industrial motor applications requiring high starting torque

System Protection: Provides essential HVAC safety shutoff by monitoring combustion chamber and tank surface temperatures

'HERM' for the compressor

York S1-024-24101-700 Contactor making it suitable for modernThe York S1 024 24101 700 is a field ready 2 pole contactor designed for high reliability switching in residential and light commercial condensing units. This component is the primary technical equivalent for the 3100 20Q315, specifically engineered to handle a 20 Amp inductive load. Operating on a standard 24V coil voltage, the 2PNO (2 Pole, Normally Open) configuration ensures that both legs of the power supply are disconnected during the off cycle,