The Heil Quaker ICP 1071387 Limit Switch is a critical safety component designed for precise thermal monitoring in high-efficiency furnace applications. This OEM replacement limit switch operates as a normally closed (NC) disc-style switch, engineered to break the electrical circuit when the internal plenum temperature reaches the 200?F high-limit threshold. This "opens on rise" action prevents heat exchanger damage and ensures safe operating conditions by shutting down the gas valve. Once the system cools to 175?F, the auto-reset limit switch automatically closes to allow for the next heating cycle, eliminating the need for manual intervention by the end-user.

For service technicians, the ICP 1071387 offers a direct drop-in solution for specific Heil, Quaker, Arcoaire, and Comfortmaker units, including many G4M and GPD series models. Utilizing genuine ICP furnace parts ensures exact calibration to L200-25 specifications, maintaining the manufacturer?s original safety certifications and airflow logic. When diagnosing short-cycling or "limit circuit open" error codes, verifying the temperature differential of this 175-200F limit switch is essential for restoring system reliability and protecting the combustion assembly from repeated thermal stress.

Key Benefits

• Precision Thermal Calibration: Designed to open at exactly 200?F and reset at 175?F (25?F differential) for consistent system protection.
• Industrial-Grade Disc Construction: Built for high-frequency cycling and durability in demanding residential and light commercial heat exchangers.
• OEM Compatibility: Guaranteed fit for various Heil Quaker ICP furnaces, eliminating the risks associated with generic "one-size-fits-all" components.
• Automated Safety Reset: Features a reliable automatic reset function that restores operation once safe temperatures are reached.

Common Questions

What are the signs that a 1071387 limit switch is failing?
Common indicators include the furnace blower running continuously while the burners stay off, or the system short-cycling during a call for heat. If the switch remains open despite the unit being cool, the internal bimetal disc or contacts have likely failed.

Can I use a higher temperature limit switch as a substitute?
No. Using a switch with a higher opening temperature can lead to heat exchanger failure or hazardous conditions. Always use the specified 175-200F range for this ICP series to maintain engineered safety margins.

How do I confirm this part fits my specific furnace?
Verify the part number 1071387 or L200-25 on your existing switch. This component is widely used in G4M090, GPD090, and GPD150 series furnaces, but cross-referencing with the unit's manual is recommended.

Item is Non Cancelable / Non Returnable

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.