The Heil Quaker ICP 1150886 Fan Timer Board is a critical electronic control component designed to regulate the operation of the burner and the circulating fan in oil furnaces. This board is technically identical to the Honeywell ST9103A1028, providing a direct-swap replacement for aging or faulty furnace controllers. Engineered for robust performance, it manages the timing sequences for both heating and cooling cycles, featuring a fixed 30-second fan-on delay and a field-adjustable heat fan-off delay with settings of 60, 90, 120, or 150 seconds. As the central junction for HVAC wiring, it monitors the thermostat, safety limit string, and oil primary control, ensuring the blower motor energizes and de-energizes at precise intervals to maximize heat exchanger efficiency and prevent short-cycling.

For service technicians, the ICP furnace control board is designed for simplified installation using standard standoffs and clearly labeled terminal connections. It supports up to a two-speed circulator fan and includes optional convenience terminals for an electronic air cleaner or humidifier. When troubleshooting, the 5-amp onboard fuse protects the 24V furnace circuit from overcurrent, while the logic circuitry automatically triggers the high-speed fan if a limit switch opens, providing an essential safety failsafe against overheating. This HVAC blower motor timer is an OEM-grade part from International Comfort Products, ensuring exact compatibility with Heil, Tempstar, and Comfortmaker oil-fired equipment.

• Universal Replacement: Direct 1:1 replacement for the Honeywell ST9103A1028 electronic fan timer.
• Adjustable Timing: DIP switch selectable fan-off delays (60/90/120/150 sec) to fine-tune home comfort and efficiency.
• Enhanced Safety: Integrated limit switch monitoring forces the circulating fan to "ON" during high-limit conditions.
• Multi-Speed Support: Manages distinct heat and cool speeds for optimized airflow in central HVAC systems.
• Reliable Switching: 15A rating handles standard 115V blower loads and accessories like EACs.

Common Questions

Is the 1150886 compatible with gas furnaces?
No, this specific board is designed primarily for oil-fired warm air furnaces. Always verify the part number against your existing Honeywell oil furnace board or manufacturer specifications before installation.

Why is my furnace fan running constantly with this board?
A constant fan often indicates a tripped safety limit or an open limit switch circuit. The 1150886 control board is programmed to run the blower continuously as a safety measure if it detects an open circuit in the limit string.

Does this board replace the ST9103A1002?
The 1150886 is noted as a replacement and follows the same functional logic as several older ST9103 models, but checking the specific wiring harness pin-out is recommended to ensure a match for your particular air handler application.

Item is Non Cancelable / Non Returnable

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.