Heil Quaker ICP 1008418 Limit Switch

The Heil Quaker ICP 1008418 Limit Switch is a critical OEM replacement part engineered for high-limit temperature monitoring in residential and light commercial furnaces. This normally closed automatic reset limit switch is designed to open the circuit at 200°F (cut-out) to prevent damage to the heat exchanger and automatically close at 180°F (cut-in) as the system cools. As a genuine ICP HVAC part, it ensures precise overheating protection and 20 LB pressure capacity for units under the International Comfort Products umbrella, including Heil, Tempstar, and Comfortmaker.

For service technicians, this furnace high limit switch is a drop-in solution for short-cycling issues or systems where the blower fan runs continuously due to a stuck or tripped safety. Relying on genuine ICP 1008418 components maintains the original equipment's factory specifications and safety protocols, crucial for gas-fired heating applications. This 180-200F limit switch is compatible with numerous models, including the FBF, GNE, and GNI series, providing the rapid thermal response necessary for modern high-efficiency HVAC systems.

Key Benefits

• System Safety: Prevents catastrophic heat exchanger failure by instantly cutting the gas valve circuit if the supply plenum exceeds 200°F.
• OEM Reliability: Built to the exact standards of International Comfort Products, ensuring correct calibration for the 180°F reset point.
• Direct Compatibility: Replaces ICP part 1008418 across Heil, Tempstar, Keeprite, and Comfortmaker product lines without need for field modification.
• Automatic Restoration: The auto limit switch design eliminates the need for manual resets after the system returns to safe operating temperatures.

Common Questions

What are the signs of a failing Heil Quaker 1008418?
Technicians typically find this part requires replacement when the furnace is short-cycling (shutting down before the thermostat is satisfied) or if the system throws an "Open Limit Switch" error code. If the internal disc remains open after the system cools, the furnace will not ignite.

Can a dirty air filter cause this switch to trip?
Yes. Restricted airflow is the primary cause of high-limit trips. If the 180-200F limit switch is opening frequently, check the air filter and blower motor before assuming the switch itself has failed.

Is the ICP 1008418 compatible with other brands?
This switch is designed specifically for ICP (International Comfort Products) brands. While similar in temperature range to other 180-200F switches, using the designated OEM part number 1008418 ensures the physical mounting and pressure ratings match your specific furnace model.

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.