This screw terminal contactor features an integrated 1 NO + 1 NC auxiliary contact configuration

ensuring the system reaches target temperatures rapidly with fewer cycles

ensuring proper static pressure performance

it restores factory-standard energy efficiency and reliability to your heating unit

York S1-031-01971-000 Control Board 320074-702 This screw terminal contactor featuresThe York S1 031 01971 000 Defrost Control Board is a critical OEM replacement part designed to manage heat pump termination and initiate cycles within commercial refrigeration systems and residential HVAC units. This Source 1 technical component functions as the primary logic board, coordinating the reversing valve, auxiliary heat strips, and outdoor fan motor to prevent hazardous ice accumulation on the condenser coils. Engineered for precise