Heil Quaker ICP 1320366 Limit Switch

This Heil Quaker ICP 1320366 Limit Switch is a high-limit safety control engineered for specific International Comfort Products (ICP) furnace applications. In the field, this component is recognized as a 240-260F AUTO Limit Switch, designed to break the 24-volt safety circuit when plenum temperatures reach the 260°F threshold. As a normally closed (NC) switch, it ensures consistent operation of the burner assembly until a high-heat condition occurs, at which point it opens to protect the heat exchanger from thermal stress. The automatic reset functionality allows the 1320366 to re-close once the temperature drops to 240°F, restoring the call for heat without manual intervention.

As an authentic OEM furnace replacement part, this switch maintains the original factory specifications required for HVAC safety circuit troubleshooting. It replaces part number HQ1320366TD and is compatible with a wide range of 80% and 90% AFUE units, including popular Heil, Tempstar, and Comfortmaker models such as the C9MPD and GDE series. For technicians, using this genuine ICP limit switch is critical for ensuring the system adheres to its designated thermal cut-out points, preventing premature cycling while maintaining a safe operating environment for the blower and heat exchanger.

• Precision Thermal Calibration: Programmed to trip at exactly 260°F and reset at 240°F for accurate safety monitoring.
• OEM Compatibility: Built to the exact standards of Heil Quaker and International Comfort Products.
• Automatic Reset Logic: Eliminates the need for manual resets after standard high-temperature cycling events.
• Robust Safety Integration: Critical for protecting the furnace from airflow obstructions or blower failure.
• Broad Application: Fits a vast array of ICP furnace models, including many older Heil and Tempstar installations.

• How do I test a limit switch with a multimeter? Set your meter to continuity or ohms. With the furnace off and wires disconnected, a functional switch should show 0 ohms (closed) at room temperature.
• What causes a 240-260F limit switch to trip repeatedly? Frequent tripping is usually a symptom of restricted airflow, often caused by a restricted air filter, a failing blower motor, or blocked return air registers.
• Does this part replace the L260-20F? Yes, the 1320366 is the technician-preferred replacement for the L260-20F series limit switches.

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.