Heil Quaker ICP 1066427 Limit Switch

When you are troubleshooting a furnace that is short-cycling or failing to initiate the burner sequence, the Heil Quaker ICP 1066427 Limit Switch is a critical point of inspection. This OEM furnace limit switch is engineered specifically for International Comfort Products (ICP) equipment, including Heil Quaker, Tempstar, and Comfortmaker units. Operating as a primary furnace high limit switch, this component features a 120-150F auto limit switch range. It is designed to interrupt the 24V control circuit to the gas valve if the heat exchanger plenum exceeds 150?F, automatically resetting once the temperature drops back to 120?F. For veteran contractors performing HVAC system diagnostics, this part is the direct ICP 1320362 replacement, ensuring a precise mechanical fit and electrical compatibility without the need for field modifications. Maintaining an OEM HVAC replacement part like the 1066427 is essential for protecting the heat exchanger from thermal stress and ensuring long-term furnace maintenance reliability.

• Precise Thermal Calibration: Factory-set 150?F trip point for automatic temperature control and system safety.
• Genuine OEM Compatibility: Direct replacement for 1320362, ensuring original equipment integrity and mounting alignment.
• Automatic Reset Function: Re-engages the heating cycle at 120?F, reducing downtime during standard operation.
• Multi-Brand Support: Fits a wide array of ICP HVAC equipment including Heil, Archer, and KeepRite models.

• Is the ICP 1066427 compatible with other ICP sub-brands? Yes, this switch is the standard thermal safeguard for Heil Quaker, Tempstar, Comfortmaker, and Day & Night furnaces that require a 150-degree cutout.
• How do I verify if my limit switch is the cause of short-cycling? Use a multimeter to check for continuity across the terminals. If the circuit stays open when the furnace is cool, the switch has failed and requires an HVAC part replacement.
• What causes this limit switch to trip prematurely? Frequent tripping is often caused by restricted airflow, such as a clogged furnace filter or a failing blower motor, rather than a faulty switch itself.

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.