Description
The York S1-ST9120U1011 is an OEM-grade, universal electronic fan timer board designed to manage and coordinate all blower functions in gas furnaces. With advanced diagnostics, configurable timing delays, and broad compatibility, this control module simplifies system retrofits and improves reliability.
Key Features
- Universal Compatibility: Designed to replace legacy control boards — including ST9101, ST9120, ST9141, and ST9160 models.
- 24 V Control Input: Operates on a low-voltage 18–30 Vac supply, making it compatible with most HVAC transformers.
- Adjustable Delay Settings: DIP switches allow customization of heat fan “on” delay (30 or 60 sec), heat fan “off” delay (60–180 sec), and cool fan on/off timing.
- LED Diagnostic Indicators: Built-in LEDs provide clear status feedback for easier troubleshooting during installation and maintenance.
- Safety & Protection: Equipped with a replaceable fuse and designed to interface with limit switches, the control board helps maintain safe furnace operation.
- Continuous Fan Support: Supports continuous low-speed circulating fan operation — with terminals for electronic air cleaner (EAC) and humidifier (HUM).
- Robust Operating Range: Rated for extreme conditions, it operates in ambient temperatures from –40 °F to +175 °F, supporting reliability in diverse climates.
