Heil Quaker ICP 1176905 Limit Switch

The Heil Quaker ICP 1176905 Limit Switch is a critical safety component designed for precise thermal regulation within residual heating systems and gas furnaces. Engineered as a normally closed disc-type sensor, this auto-reset limit switch serves as a primary high-limit protection device, preventing heat exchanger damage and ensuring safe operational cycles. It is calibrated to a 165°F opening temperature (cut-out) on temperature rise and automatically re-engages at a 125°F closing temperature (cut-in) as the system cools. This exact switching differential is essential for maintaining the OEM specifications of International Comfort Products equipment including brands like Tempstar, Comfortmaker, and Arcoaire.

Replacing a faulty furnace high limit switch with this genuine ICP 1176905 part restores the system's ability to respond to restricted airflow or failed blower motors. The unit features a standard 1/2-inch disc configuration and is compatible with a broad range of models, including the F8MTL, G8MVL, and N8MSL series. For field technicians, this 165F limit switch provides a drop-in solution that meets rigorous HVAC safety standards without the need for field adjustments or brackets.

• Optimized Thermal Protection: Precise 165 degree Fahrenheit cutout prevents furnace overheating and potential plenum damage.
• Automatic Reset Logic: Features auto-reset functionality that closes at 125°F, allowing for seamless system recovery once the temperature stabilizes.
• Wide ICP Compatibility: Direct OEM replacement part for multiple Heil, Quaker, and KeepRite furnace configurations.
• Industrial-Grade Build: Designed to withstand high-cycling environments common in modern high-efficiency heating units.

• What causes this limit switch to trip frequently? Usually, a trip indicates restricted airflow caused by a dirty furnace filter, blocked returns, or a failing blower motor.
• Can I use a higher temperature switch as a replacement? No. Using a switch with a different thermal rating voids the safety listing of the furnace and can lead to dangerous heat exchanger temperatures.
• Is this switch compatible with 80% and 90% AFUE furnaces? Yes, the ICP 1176905 is utilized across various gas furnace efficiency tiers that specify a 165-degree limit.

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.