Resideo - Honeywell Home ST9120U1011 Furnace Electronic Fan Timer

Furnace Electronic Fan Timer ST9120U1011 from Honeywell Home delivers precise fan control for gas furnaces. This reliable timer is designed for Type Combustion Control and operates on 18 to 30 Volt AC at 50/60 Hz.

With CSA and UL approvals, it meets essential safety standards for residential and commercial use. The compact unit is built for rugged furnace environments and wide temperature tolerance.

On delay times are adjustable: 30/60 seconds for Heat (Heat Fan) and 4/30 seconds for Cool (Cool Fan). Off delays offer 60/120/150/180 seconds for Heat and 30/60 seconds for Cool.

This ST9120U1011 timer is ideal for controlling furnace blower cycles, helping balance comfort and efficiency.

Designed for easy installation and reliable operation, the ST9120U1011 works with standard gas furnace wiring and control boards. Its Type Combustion Control configuration ensures fans run in sync with heat cycles, reducing needless blower time and improving efficiency. The adjustable ON and OFF delays fit a wide range of furnace models, keeping comfort consistent through seasonal changes.

• Voltage rating: 18–30 V AC at 50/60 Hz
• Operating temperature: -40 to 175 °F
• Application: Gas furnace control
• Approvals: CSA, UL
• Timing options: Adjustable On/Off delays for Heat and Cool fans