The Honeywell ST9120U1011/U is a universal electronic fan timer designed to replace a wide range of OEM fan control boards used in gas furnaces. This control regulates blower on/off sequencing, manages heating and cooling blower speeds, and provides dependable timing functions to ensure proper furnace operation. The Lennox X8609 version is fully compatible with select Lennox models and serves as a reliable, high-quality direct replacement.

This universal board supports PSC blower motors and includes onboard diagnostic LEDs for fast troubleshooting. It is ideal for service technicians and homeowners needing a precise, durable, and easy-to-install fan control solution.

 

Key Features:

• Universal replacement for many OEM fan timer boards
• Manages blower sequencing for heat, cool, and fan-only modes
• Controls PSC blower motors
• Includes diagnostic LED indicators for quick system checks
• Adjustable blower off-delay for optimized comfort
• Robust Honeywell construction for long-term performance
• Direct replacement for Lennox X8609 applications
• Suitable for a wide range of residential furnaces

 

Specifications:

• Model: Honeywell ST9120U1011/U
• Lennox Part: X8609
• Voltage: 120/240 VAC input, 24 VAC control
• Motor Type Supported: PSC
• Heating Fan Delay: Adjustable
• Cooling Fan Delay: Fixed
• Application: Gas furnace fan control timing
• Mounting: Universal multi-hole layout
• Status Indicators: LED diagnostics