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ST9120U1011 | Honeywell Universal Electronic Fan Timer Control Board for Gas Furnace Blower and Fan Sequencing
- Regular price
- $149.00
- Sale price
- $149.00
- Regular price
-
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Product Description P/N: ST9120U1011
Description
The Honeywell ST9120U1011 is a universal electronic fan timer control board designed to manage combustion blower and circulating fan operation in gas warm air furnace systems. This module provides timed control for heating and cooling fan delays while supporting optional humidifier and electronic air cleaner connections. The ST9120U1011 ensures stable sequencing performance and compatibility across multiple furnace platforms.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Honeywell |
| Category | HVAC Controls |
| Part Number | ST9120U1011 |
| Subcategory | Fan Timer Control Board |
| Product Type | Universal Electronic Fan Timer |
| Control Voltage | 24 VAC |
| Power Voltage Requirements | 18–30 VAC, 60 Hz |
| Fan Motor Support | Circulating fan up to two speeds |
| Heating Delay On | Adjustable: 30 or 60 seconds |
| Heating Delay Off | Adjustable: 60, 100, 140, or 180 seconds |
| Cooling Delay On | Adjustable: 4 or 30 seconds |
| Cooling Delay Off | Fixed: 30 seconds |
| Accessory Outputs | HUM and EAC terminals included |
| Fuse Type | Replaceable onboard fuse |
| Operating Temperature Range | -40°C to +79°C |
| Dimensions | 3.5"D × 7.6"W × 3.5"H |
| Weight | 0.98 lbs |
Information About ST9120U1011
The ST9120U1011 is a Honeywell universal fan timer module built as a central control board for blower and circulating fan management in gas heating appliances. It is designed for broad replacement compatibility, covering multiple legacy Honeywell fan timer series to simplify service and inventory needs. The board includes configurable timing controls through onboard DIP switches, allowing field adjustment of heat and cool fan delay settings. It also supports accessory integration through dedicated terminals for electronic air cleaners and humidifiers, providing expanded HVAC system control options.
Key Features:
-
Universal Fan Timer Control Board: Integrates combustion blower and circulating fan operation in gas furnace applications.
-
Multi-Model Replacement Capability: Designed to replace numerous Honeywell ST9120, ST9101, ST9141, and ST9160 boards.
-
Adjustable Heat and Cool Fan Delays: Field-selectable delay-on and delay-off settings through DIP switch configuration.
-
LED Diagnostic System Indicator: Provides onboard system status feedback for troubleshooting support.
-
HUM and EAC Accessory Connections: Includes terminal outputs for humidifier and electronic air cleaner integration.
-
Two-Speed Circulating Fan Support: Controls circulating fan demand operation with up to two selectable speeds.
-
Replaceable Fuse Protection: Equipped with an onboard serviceable fuse for improved electrical protection.
-
Continuous Circulation Option: Supports optional continuous low-speed indoor air circulation when configured.
The ST9120U1011 delivers the reliability and precision required for furnace blower sequencing and fan timing control in HVAC heating and cooling systems.
Description
The Honeywell ST9120U1011 is a universal electronic fan timer control board designed to manage combustion blower and circulating fan operation in gas warm air furnace systems. This module provides timed control for heating and cooling fan delays while supporting optional humidifier and electronic air cleaner connections. The ST9120U1011 ensures stable sequencing performance and compatibility across multiple furnace platforms.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Honeywell |
| Category | HVAC Controls |
| Part Number | ST9120U1011 |
| Subcategory | Fan Timer Control Board |
| Product Type | Universal Electronic Fan Timer |
| Control Voltage | 24 VAC |
| Power Voltage Requirements | 18–30 VAC, 60 Hz |
| Fan Motor Support | Circulating fan up to two speeds |
| Heating Delay On | Adjustable: 30 or 60 seconds |
| Heating Delay Off | Adjustable: 60, 100, 140, or 180 seconds |
| Cooling Delay On | Adjustable: 4 or 30 seconds |
| Cooling Delay Off | Fixed: 30 seconds |
| Accessory Outputs | HUM and EAC terminals included |
| Fuse Type | Replaceable onboard fuse |
| Operating Temperature Range | -40°C to +79°C |
| Dimensions | 3.5"D × 7.6"W × 3.5"H |
| Weight | 0.98 lbs |
Information About ST9120U1011
The ST9120U1011 is a Honeywell universal fan timer module built as a central control board for blower and circulating fan management in gas heating appliances. It is designed for broad replacement compatibility, covering multiple legacy Honeywell fan timer series to simplify service and inventory needs. The board includes configurable timing controls through onboard DIP switches, allowing field adjustment of heat and cool fan delay settings. It also supports accessory integration through dedicated terminals for electronic air cleaners and humidifiers, providing expanded HVAC system control options.
Key Features:
-
Universal Fan Timer Control Board: Integrates combustion blower and circulating fan operation in gas furnace applications.
-
Multi-Model Replacement Capability: Designed to replace numerous Honeywell ST9120, ST9101, ST9141, and ST9160 boards.
-
Adjustable Heat and Cool Fan Delays: Field-selectable delay-on and delay-off settings through DIP switch configuration.
-
LED Diagnostic System Indicator: Provides onboard system status feedback for troubleshooting support.
-
HUM and EAC Accessory Connections: Includes terminal outputs for humidifier and electronic air cleaner integration.
-
Two-Speed Circulating Fan Support: Controls circulating fan demand operation with up to two selectable speeds.
-
Replaceable Fuse Protection: Equipped with an onboard serviceable fuse for improved electrical protection.
-
Continuous Circulation Option: Supports optional continuous low-speed indoor air circulation when configured.
The ST9120U1011 delivers the reliability and precision required for furnace blower sequencing and fan timing control in HVAC heating and cooling systems.
