Resideo ST9103A1002 Electronic Fan Timer

Electronic Fan Timer, 18-30Vac, Fixed or 45 Second Heat Fan On Delay, Adjustable, 60 Second, 90 Second, 120 Second, 150 Second Heat Fan Off Delay, Fixed 0 Second Cool Fan On Delay, Fixed 0 Second Cool Fan Off Delay, -40-150 Degree Ambient Temperature Range, Integrates Control of Burner and Circulating Fan Operations in an Oil Furnace

ST9103A1002 is the updated version for 20123101

Resideo ST9103A1002 Electronic Fan Timer

The Resideo ST9103A1002 (SKU: ST9103A1002/U) is a replacement electronic fan timer designed for reliable control of burner and circulating fan operations in oil and gas furnaces. This advanced, single-circuit control board serves as the central wiring point for key furnace components, including the combustion air blower, circulating air blower, oil primary control, limit circuits, and thermostat connections.

Engineered for performance and versatility, the ST9103A1002 provides adjustable fan-on and fan-off delay timings to ensure efficient heating and cooling operation. With a wide ambient temperature range of -40°F to 150°F, it’s built to withstand demanding HVAC conditions.

Key Features:

• OEM Resideo replacement fan timer for gas warm air appliances and oil furnaces

• Adjustable delay settings for heat and cool fan operations

  • Heat Fan On Delay: Adjustable 30 or 60 seconds (factory set at 30 sec)

  • Heat Fan Off Delay: Adjustable 60, 120, 150, or 180 seconds (factory set at 120 sec)

  • Cool Fan On Delay: Adjustable 4 or 30 seconds (factory set at 4 sec)

  • Cool Fan Off Delay: Adjustable 30 or 60 seconds (factory set at 30 sec)

• Input Voltage: 18–30 VAC

• Temperature Range: -40°F to 150°F (-40°C to 66°C)

• Simplifies replacement and wiring in furnace control systems

• Ideal for combustion air blower and circulating air blower control

Applications:

• Gas warm air appliances

• Oil furnaces

Product Type: Electronic Fan Timer
Brand: Resideo (Pro Brand)
Model: ST9103A1002 / ST9103A1002/U

Ensure consistent, efficient furnace operation with the Resideo ST9103A1002 Electronic Fan Timer—a trusted replacement solution for both gas and oil furnace applications.

Safety Info:
California Proposition 65 Warning – This product may contain materials known to the State of California to cause cancer or reproductive harm.