Heil Quaker ICP 1177659 Temperaure Switch

The Heil Quaker ICP 1177659 Temperature Switch is a critical high-limit safety component designed for precise thermal monitoring in residential and light commercial HVAC systems. Often categorized as a furnace limit switch or thermal disc, this 1177659 OEM replacement part features a fixed setpoint configuration of 130 degrees Fahrenheit open (130?F Op) and 100 degrees Fahrenheit closed (100?F Cl). This 30-degree differential ensures consistent equipment protection and prevents rapid cycling during operation. Engineered for compatibility with Heil, Quaker, Comfortmaker, and Tempstar units, this switch uses a bimetal disc mechanism to break the electrical circuit if the heat exchanger temperatures exceed safe operating limits. When troubleshooting HVAC high limit trips, verifying part numbers like 1177659 and checking the snap-disc continuity is standard procedure for maintaining system integrity and airflow regulation. This component provides the reliable thermal feedback necessary for modern integrated furnace control boards.

• Exact OEM Calibration: Ensures the fan or burner cut-out occurs at precisely 130?F, maintaining factory safety standards.
• Broad Compatibility: Direct drop-in replacement for specific ICP furnace parts, simplifying inventory for service vans.
• Durable Bimetal Construction: Designed for high-cycle longevity within the high-heat environment of the plenum.
• Fast Response Time: The snap-action disc provides immediate circuit interruption to protect the heat exchanger from overheating.

What causes this limit switch to trip frequently?
Frequent tripping is usually caused by restricted airflow, such as a clogged filter, blocked return vents, or a failing blower motor, rather than a faulty 1177659 switch itself.

Can I use a switch with a different temperature rating?
No. For safety and compliance, always match the 130?F open and 100?F closed specifications found on the original Heil Quaker limit switch.

How do I test the 1177659 during a service call?
Perform a continuity test at room temperature; the switch should be closed. If the circuit is open while the unit is cool, the bimetal disc has failed or the switch has reached its end of life.

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.