Heil Quaker ICP 1171904 Limit Switch
The Heil Quaker ICP 1171904 Limit Switch is a critical safety component designed for precise thermal regulation within high-efficiency furnace systems. This L145-55F primary limit switch features a 145-degree Fahrenheit cut-out setpoint and a 55-degree Fahrenheit differential for automatic reset, ensuring the heat exchanger does not exceed safe operating temperatures. As an OEM ICP furnace replacement part, it provides exact fitment for Heil, Comfortmaker, and Tempstar units, maintaining the structural integrity of the combustion chamber. Replacing a failed limit switch with this factory-specified thermal disc control restores the sequence of operation and prevents premature blower cycling or system lockout. This high-limit safety switch is engineered for heavy-duty cycling in residential HVAC applications, providing technicians with a reliable solution for persistent furnace overheating codes. Ensure the mounting footprint matches the existing plenum cutout to maintain proper airflow exposure across the sensing element.
Key Benefits
- Precise Thermal Calibration: Factory-set 145?F trip point ensures immediate circuit interruption during over-temperature events.
- Automatic Reset Functionality: Closes the circuit once the plenum temperature drops by 55?F, allowing for standard system recovery.
- Direct OEM Compatibility: Engineered specifically for Heil Quaker and ICP heating equipment to ensure electrical rating compliance.
- Durable Construction: Built to withstand the high-temperature environment of the furnace heat exchanger without drift in setpoints.
Common Questions
What causes a limit switch to trip repeatedly?
Frequent tripping is usually indicative of restricted airflow, often caused by a fouled HVAC air filter, a failing blower motor, or undersized ductwork causing the heat exchanger to overheat.
Can I use an L145-40F switch if the original was an L145-55F?
It is critical to match the differential rating (55F). Using a different reset temperature can cause improper blower timing and short-cycling, potentially damaging the furnace internals.
How do I verify if the 1171904 limit switch is defective?
Using a multimeter, check for continuity across the terminals at room temperature. If the switch is open while cool, the internal bimetal disc has failed and requires replacement.
Notes
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.
Original: $35.75
-65%$35.75
$12.51Heil Quaker ICP 1171904 Limit Switch
The Heil Quaker ICP 1171904 Limit Switch is a critical safety component designed for precise thermal regulation within high-efficiency furnace systems. This L145-55F primary limit switch features a 145-degree Fahrenheit cut-out setpoint and a 55-degree Fahrenheit differential for automatic reset, ensuring the heat exchanger does not exceed safe operating temperatures. As an OEM ICP furnace replacement part, it provides exact fitment for Heil, Comfortmaker, and Tempstar units, maintaining the structural integrity of the combustion chamber. Replacing a failed limit switch with this factory-specified thermal disc control restores the sequence of operation and prevents premature blower cycling or system lockout. This high-limit safety switch is engineered for heavy-duty cycling in residential HVAC applications, providing technicians with a reliable solution for persistent furnace overheating codes. Ensure the mounting footprint matches the existing plenum cutout to maintain proper airflow exposure across the sensing element.
Key Benefits
- Precise Thermal Calibration: Factory-set 145?F trip point ensures immediate circuit interruption during over-temperature events.
- Automatic Reset Functionality: Closes the circuit once the plenum temperature drops by 55?F, allowing for standard system recovery.
- Direct OEM Compatibility: Engineered specifically for Heil Quaker and ICP heating equipment to ensure electrical rating compliance.
- Durable Construction: Built to withstand the high-temperature environment of the furnace heat exchanger without drift in setpoints.
Common Questions
What causes a limit switch to trip repeatedly?
Frequent tripping is usually indicative of restricted airflow, often caused by a fouled HVAC air filter, a failing blower motor, or undersized ductwork causing the heat exchanger to overheat.
Can I use an L145-40F switch if the original was an L145-55F?
It is critical to match the differential rating (55F). Using a different reset temperature can cause improper blower timing and short-cycling, potentially damaging the furnace internals.
How do I verify if the 1171904 limit switch is defective?
Using a multimeter, check for continuity across the terminals at room temperature. If the switch is open while cool, the internal bimetal disc has failed and requires replacement.
Notes
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Heil Quaker ICP 1171904 Limit Switch is a critical safety component designed for precise thermal regulation within high-efficiency furnace systems. This L145-55F primary limit switch features a 145-degree Fahrenheit cut-out setpoint and a 55-degree Fahrenheit differential for automatic reset, ensuring the heat exchanger does not exceed safe operating temperatures. As an OEM ICP furnace replacement part, it provides exact fitment for Heil, Comfortmaker, and Tempstar units, maintaining the structural integrity of the combustion chamber. Replacing a failed limit switch with this factory-specified thermal disc control restores the sequence of operation and prevents premature blower cycling or system lockout. This high-limit safety switch is engineered for heavy-duty cycling in residential HVAC applications, providing technicians with a reliable solution for persistent furnace overheating codes. Ensure the mounting footprint matches the existing plenum cutout to maintain proper airflow exposure across the sensing element.
Key Benefits
- Precise Thermal Calibration: Factory-set 145?F trip point ensures immediate circuit interruption during over-temperature events.
- Automatic Reset Functionality: Closes the circuit once the plenum temperature drops by 55?F, allowing for standard system recovery.
- Direct OEM Compatibility: Engineered specifically for Heil Quaker and ICP heating equipment to ensure electrical rating compliance.
- Durable Construction: Built to withstand the high-temperature environment of the furnace heat exchanger without drift in setpoints.
Common Questions
What causes a limit switch to trip repeatedly?
Frequent tripping is usually indicative of restricted airflow, often caused by a fouled HVAC air filter, a failing blower motor, or undersized ductwork causing the heat exchanger to overheat.
Can I use an L145-40F switch if the original was an L145-55F?
It is critical to match the differential rating (55F). Using a different reset temperature can cause improper blower timing and short-cycling, potentially damaging the furnace internals.
How do I verify if the 1171904 limit switch is defective?
Using a multimeter, check for continuity across the terminals at room temperature. If the switch is open while cool, the internal bimetal disc has failed and requires replacement.
Notes
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.
