Lochinvar & A.O. Smith 100271315 Limit Switch
The Lochinvar & A.O. Smith 100271315 Limit Switch is a critical safety component engineered for high-performance hydronic and water heating systems. As a veteran technician knows, maintaining the integrity of the safety loop is non-negotiable. This OEM high limit switch is designed to monitor outlet water temperature and provide a positive safety shutdown by interrupting the electrical circuit if temperatures exceed the factory-set threshold, typically ranging between 110-230 degrees Fahrenheit. This prevents catastrophic heat exchanger failure and ensures the system operates within safe physical parameters.
Built for rigorous commercial and residential applications, this fixed-temperature limit control features a 1/2-inch NPT connection for secure mounting and accurate thermal sensing. It is compatible with a wide array of Lochinvar Knight and A.O. Smith boilers and water heaters, including many FBL-series residential models. When troubleshooting a system that keeps locking out on a manual or auto-reset limit, verify that the circulator pump is moving the required GPM and that the heat exchanger is free of scale buildup. This 100271315 replacement part ensures your equipment meets original manufacturer specifications for overheating protection and HVAC system reliability.
Key Benefits
- Precision Thermal Response: Engineered to trip accurately at its designated setpoint to prevent heat exchanger cracking and thermal stress.
- Universal OEM Compatibility: A direct replacement for Lochinvar and A.O. Smith part number 100271315, ensuring seamless integration into the existing wiring harness.
- Industrial Grade Construction: Designed to handle 120-240 VAC environments, providing long-term HVAC control stability in demanding mechanical rooms.
- Critical Safety Compliance: Restores the vital high limit safety circuit required for safe equipment operation and code compliance.
Common Questions
What causes this limit switch to trip repeatedly?
Repeated tripping is often a symptom of low flow, scale buildup in the heat exchanger, or a failing circulator pump. Always check for air in the system or a dirty strainer before assuming the switch itself has failed.
Is this switch an automatic or manual reset?
This specific high limit switch is designed to interface with the control board's safety string. Depending on the specific boiler model's firmware, it may require a manual reset at the user interface once the temperature drops below the differential.
Can I use an aftermarket limit switch instead of the 100271315?
It is strongly recommended to use this genuine OEM part. Aftermarket switches may have different temperature curves or response times, which can compromise the safety of the heat exchanger and the overall system.
This item is not eligible for free shipping.
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.
Lochinvar & A.O. Smith 100271315 Limit Switch
The Lochinvar & A.O. Smith 100271315 Limit Switch is a critical safety component engineered for high-performance hydronic and water heating systems. As a veteran technician knows, maintaining the integrity of the safety loop is non-negotiable. This OEM high limit switch is designed to monitor outlet water temperature and provide a positive safety shutdown by interrupting the electrical circuit if temperatures exceed the factory-set threshold, typically ranging between 110-230 degrees Fahrenheit. This prevents catastrophic heat exchanger failure and ensures the system operates within safe physical parameters.
Built for rigorous commercial and residential applications, this fixed-temperature limit control features a 1/2-inch NPT connection for secure mounting and accurate thermal sensing. It is compatible with a wide array of Lochinvar Knight and A.O. Smith boilers and water heaters, including many FBL-series residential models. When troubleshooting a system that keeps locking out on a manual or auto-reset limit, verify that the circulator pump is moving the required GPM and that the heat exchanger is free of scale buildup. This 100271315 replacement part ensures your equipment meets original manufacturer specifications for overheating protection and HVAC system reliability.
Key Benefits
- Precision Thermal Response: Engineered to trip accurately at its designated setpoint to prevent heat exchanger cracking and thermal stress.
- Universal OEM Compatibility: A direct replacement for Lochinvar and A.O. Smith part number 100271315, ensuring seamless integration into the existing wiring harness.
- Industrial Grade Construction: Designed to handle 120-240 VAC environments, providing long-term HVAC control stability in demanding mechanical rooms.
- Critical Safety Compliance: Restores the vital high limit safety circuit required for safe equipment operation and code compliance.
Common Questions
What causes this limit switch to trip repeatedly?
Repeated tripping is often a symptom of low flow, scale buildup in the heat exchanger, or a failing circulator pump. Always check for air in the system or a dirty strainer before assuming the switch itself has failed.
Is this switch an automatic or manual reset?
This specific high limit switch is designed to interface with the control board's safety string. Depending on the specific boiler model's firmware, it may require a manual reset at the user interface once the temperature drops below the differential.
Can I use an aftermarket limit switch instead of the 100271315?
It is strongly recommended to use this genuine OEM part. Aftermarket switches may have different temperature curves or response times, which can compromise the safety of the heat exchanger and the overall system.
This item is not eligible for free shipping.
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
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Shipping & Returns
Description
The Lochinvar & A.O. Smith 100271315 Limit Switch is a critical safety component engineered for high-performance hydronic and water heating systems. As a veteran technician knows, maintaining the integrity of the safety loop is non-negotiable. This OEM high limit switch is designed to monitor outlet water temperature and provide a positive safety shutdown by interrupting the electrical circuit if temperatures exceed the factory-set threshold, typically ranging between 110-230 degrees Fahrenheit. This prevents catastrophic heat exchanger failure and ensures the system operates within safe physical parameters.
Built for rigorous commercial and residential applications, this fixed-temperature limit control features a 1/2-inch NPT connection for secure mounting and accurate thermal sensing. It is compatible with a wide array of Lochinvar Knight and A.O. Smith boilers and water heaters, including many FBL-series residential models. When troubleshooting a system that keeps locking out on a manual or auto-reset limit, verify that the circulator pump is moving the required GPM and that the heat exchanger is free of scale buildup. This 100271315 replacement part ensures your equipment meets original manufacturer specifications for overheating protection and HVAC system reliability.
Key Benefits
- Precision Thermal Response: Engineered to trip accurately at its designated setpoint to prevent heat exchanger cracking and thermal stress.
- Universal OEM Compatibility: A direct replacement for Lochinvar and A.O. Smith part number 100271315, ensuring seamless integration into the existing wiring harness.
- Industrial Grade Construction: Designed to handle 120-240 VAC environments, providing long-term HVAC control stability in demanding mechanical rooms.
- Critical Safety Compliance: Restores the vital high limit safety circuit required for safe equipment operation and code compliance.
Common Questions
What causes this limit switch to trip repeatedly?
Repeated tripping is often a symptom of low flow, scale buildup in the heat exchanger, or a failing circulator pump. Always check for air in the system or a dirty strainer before assuming the switch itself has failed.
Is this switch an automatic or manual reset?
This specific high limit switch is designed to interface with the control board's safety string. Depending on the specific boiler model's firmware, it may require a manual reset at the user interface once the temperature drops below the differential.
Can I use an aftermarket limit switch instead of the 100271315?
It is strongly recommended to use this genuine OEM part. Aftermarket switches may have different temperature curves or response times, which can compromise the safety of the heat exchanger and the overall system.
This item is not eligible for free shipping.
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.
