When you're dealing with a furnace that is short-cycling or a blower motor that won't kick on, the Heil Quaker ICP 1008305 5-inch Fan and Limit Control is often the exact mechanical fix required to restore safe operation. This OEM replacement limit switch serves as a critical safety interface, monitoring plenum temperatures to prevent heat exchanger overheating. As a 5-inch insertion limit control, it features a bimetal sensing probe that provides precise thermal response, ensuring the indoor blower activates at the correct temperature and shuts down the gas valve if the high-limit setpoint is reached.

This universal HVAC limit control is frequently found in International Comfort Products (ICP) equipment, including brands like Tempstar, Arcoaire, and Comfortmaker. It replaces older part numbers such as ICP 1000985 and is functionally equivalent to the Honeywell L4064B series. For contractors, the adjustable dial allows for fine-tuning the fan-on/fan-off temperatures, ensuring the system doesn't circulate cold air at the start of the cycle. Relying on genuine ICP furnace parts ensures the mechanical tolerances meet the original manufacturer's venting and safety specifications.

• Dual-Function Regulation: Manages both the blower motor timing and high-temperature safety shutdown in a single 5-inch component.
• Broad ICP Compatibility: Direct drop-in for Heil Quaker, Arcoaire, and Tempstar units, reducing diagnostic time on the job site.
• Adjustable Thermal Setpoints: Features a rotating dial to customize the fan cycle based on specific plenum airflow requirements.
• Universal Wiring: Supports standard 24V or 120V control circuits typical in residential gas and oil furnaces.

• Will this replace my Honeywell L4064B? Yes, the ICP 1008305 is the primary OEM equivalent for 5-inch insertion Honeywell models used in ICP equipment.
• My blower runs constantly; is this the culprit? If the limit switch contacts are stuck closed or the "manual" fan switch is pushed in, the blower will bypass the thermostat. Testing for continuity across the fan terminals will confirm.
• How do I set the limit pointers? Setting the high-limit pointer to the manufacturer’s spec (typically between 150°F and 200°F) is vital to prevent nuisance tripping while maintaining safety.

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.