Heil Quaker ICP 1087749 Temp Swtich

For veteran HVAC technicians and mechanical contractors, the Heil Quaker ICP 1087749 Temperature Switch is a critical high-limit safety control engineered to prevent heat exchanger damage and hazardous operating conditions in residential heating units. This authentic OEM replacement part is precision-calibrated for a high-temperature cut-out at 306?F (152?C), making it a vital component for maintaining HVAC system safety and regulatory compliance. Designed for direct fitment in International Comfort Products (ICP) equipment, including Heil, Quaker, and Tempstar furnaces, this thermal fuse switch ensures reliable circuit interruption when the plenum temperature exceeds designated safety thresholds.

Constructed with durable materials to withstand high-thermal cycles, the ICP 1087749 temperature limit switch features a compact 0.95-inch mounting depth for easy installation in tight furnace cabinets. Its primary function as a safety limit control is to protect the blower motor and heat exchanger from thermal stress caused by restricted airflow or mechanical failure. Replacing a faulty 306F temperature switch with this genuine ICP component restores original equipment performance and prevents common furnace overheating issues that lead to system short-cycling and localized component failure.

• Exact OEM Specifications: Engineered specifically for ICP-branded heating equipment, ensuring direct compatibility without the need for field modifications.
• High-Temperature Protection: Fixed 306?F cut-out threshold provides essential protection for the internal heat exchanger.
• HVAC System Reliability: High-quality internal contacts prevent nuisance tripping and ensure consistent furnace safety limit operation.
• Simplified Service Calls: Standardized mounting footprint reduces time on site during emergency furnace repair or routine maintenance.

What causes a 306?F high-limit switch to trip?
Tripping is typically caused by inadequate airflow, often resulting from a dirty air filter, a failing blower motor, or blocked return ducts. If the switch opens at 306?F, it is performing its intended safety function to prevent crack formation in the heat exchanger.

Is the ICP 1087749 a manual or automatic reset switch?
This specific thermal fuse model often serves as a one-time safety cut-out or a high-threshold limit; technicians should verify the specific furnace wiring diagram, as repeated tripping indicates a serious underlying airflow or combustion issue.

How do I verify if this limit switch is defective?
Technicians should perform a continuity test across the terminals using a multimeter while the furnace is cool. No continuity under normal ambient temperatures typically indicates a blown thermal safety fuse that requires immediate replacement.

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.