York S1-025-30788-700 Flame Sensor specifically HH12ZA189 and HH12ZA189A

specifically HH12ZA189 and HH12ZA189A

F operating range

Key Benefits for Technicians: OEM Compatibility: Serves as the factory-authorized direct replacement for 024-35812-000

Direct 620858R Replacement: Corrects common system power issues by replacing failed 4021F and 620858R units (verify lead-to-spade conversion)

providing the necessary electrical output to keep the magnetic operator engaged under high-heat conditions

York S1-025-30788-700 Flame Sensor specifically HH12ZA189 and HH12ZA189AThe York S1 025 30788 700 Flame Sensor is a critical OEM replacement component designed for precise flame rectification within residential and commercial furnace assemblies. As a direct replacement for the legacy 025 30788 000, this sensor operates by utilizing the ionized particles in the gas flame to conduct a microamp signal back to the integrated furnace control board. When the York furnace flame sensor detects a stable flame, it allows the gas