Heil Quaker ICP 1071246 Limit Switch

The Heil Quaker ICP 1071246 Limit Switch is a critical safety component engineered for precision thermal monitoring in residential and light commercial HVAC systems. This L117-25F limit switch serves as a high-limit protection device, typically mounted on the supply plenum or heat exchanger to prevent hazardous overheating conditions. Featuring a 117?F cut-out temperature and a 25?F differential, the switch automatically opens the electrical circuit to the gas valve or heating elements if internal temperatures exceed safety parameters, subsequently resetting once the system cools to approximately 92?F. As an OEM furnace replacement part, it ensures seamless compatibility with Heil, Quaker, and International Comfort Products (ICP) equipment, maintaining the integrity of the original factory specifications. For technicians, this normally closed thermal switch is essential for resolving issues where the blower fan runs continuously or the furnace cycles on high limit due to restricted airflow or component fatigue.

Key Benefits

• Precise Thermal Regulation: Engineered with a fixed 117-degree trip point to protect the heat exchanger from structural damage and ensure safe operation.
• OEM Compatibility: Direct-fit replacement for ICP part 1071246, ensuring proper terminal alignment and mounting without field modification.
• Automatic Reset Logic: Features a 25?F differential that allows the system to resume normal heating cycles automatically once safe temperatures are restored.
• Durable Construction: Built to withstand high-cycle environments, providing reliable high-limit protection over the service life of the air handler or furnace.

Common Questions

How do I verify if my 1071246 limit switch is failing?
Technicians should test for continuity across the terminals while the system is cool; a reading of "open" or high resistance during a call for heat usually indicates a tripped or failed switch. If the blower runs non-stop, the switch may be stuck in the open position.

What causes this limit switch to trip frequently?
Frequent tripping is often a symptom of restricted airflow, such as a clogged 1-inch pleated filter, dirty evaporator coil, or undersized ducting, rather than a faulty switch itself.

Can I use a switch with a different temperature rating?
Never substitute an L117-25F with a higher temperature rating. Doing so bypasses engineered safety limits and can lead to heat exchanger failure or fire hazards.

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.