The Heil Quaker ICP 1320381 Limit Switch is a critical OEM replacement part engineered for high-limit thermal protection in residential heating systems. Designed as an auto-reset limit switch, this component monitors internal heat exchanger temperatures, maintaining a precise operating range of 146?F to 150?F. When temperatures exceed the L150-40 threshold, the switch breaks the circuit to prevent equipment damage and ensure safe operation. This furnace high limit switch is a direct drop-in for International Comfort Products (ICP) units, including brands such as Tempstar, Comfortmaker, and Arcoaire. Utilizing a genuine ICP 1320381 ensures the system maintains its original engineering specifications and airflow safety protocols. For technicians troubleshooting short cycling or blower motor inconsistencies, verifying the integrity of this thermal limit control is a standard diagnostic step to restore reliable furnace performance and prevent premature heat exchanger failure. Key Benefits Precise Thermal Calibration: Fixed 146-150?F range provides accurate high-limit protection tailored to ICP equipment specifications. Auto-Reset Functionality: Automatically restores the circuit once the system cools to safe parameters, reducing unnecessary service calls. Broad ICP Compatibility: Engineered for seamless integration with Heil, Quaker, Tempstar, and Comfortmaker furnaces. Enhanced System Safety: Prevents hazardous overheating conditions by interrupting the burner circuit during airflow restrictions. Common Questions What are the symptoms of a failing ICP 1320381 limit switch? Common indicators include the furnace shutting down before reaching the thermostat setpoint, the blower fan running continuously, or the system exhibiting short cycling behavior. Technicians should test for continuity across the terminals when the switch is cool. Can I use a generic limit switch instead of the 1320381? While universal switches exist, using the OEM 1320381 limit switch is recommended to ensure the temperature trip points and reset differentials match the manufacturer?s safety design for the heat exchanger. What causes this high limit switch to trip frequently? Frequent tripping is usually caused by restricted airflow, such as a clogged HVAC air filter, blocked return ducts, or a malfunctioning blower motor causing the temperature to spike above the 150?F limit. 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.
