York S1-025-21785-001 Heater Els PW 17895 while the 5 MFD side

while the 5 MFD side supports the condenser fan motor

Wide Compatibility: Standardized temperature range and electrical ratings make it a suitable replacement aquastat for most hydronic heating systems

This unit simplifies installation by eliminating the need for a separate controller

it communicates vital data to the control board to modulate burner firing rates and prevent heat exchanger damage from excessive flue temperatures

Universal Integration: Standardized resistance curve allows for seamless integration with BAS temperature sensors and legacy Johnson Controls hardware

York S1-025-21785-001 Heater Els PW 17895 while the 5 MFD sideThe York S1 025 21785 001 is a high performance 10KW 240V electric heater configured as a 3 element heat kit for professional HVACR applications. This OEM York replacement part is engineered to provide supplemental or emergency heat for residential and light commercial air handlers. Operating on a 240V single phase supply, the three element design ensures balanced heat distribution and rapid thermal response during low ambient conditions. As a veteran