Lochinvar & A.O. Smith 100148402 Temp Limit
The Lochinvar & A.O. Smith 100148402 Temp Limit is a critical safety component designed specifically for high-efficiency commercial and residential boilers. This 330C Over-Temp Limit switch (often referred to as the heat exchanger high limit) acts as a primary fail-safe by monitoring thermal conditions at the heat exchanger. When temperatures exceed the 330Ā°C (626Ā°F) threshold, the 100148402 limit switch breaks the control circuit to initiate an immediate system shutdown, preventing catastrophic equipment damage. As a genuine OEM Lochinvar replacement part, it ensures precise calibration and fits seamlessly into AWN and KBN series units. For technicians performing boiler high limit troubleshooting or routine maintenance, using this factory-spec switch is essential for maintaining the operational integrity of A.O. Smith and Lochinvar heating systems, avoiding the risks associated with non-compliant aftermarket sensors.
Key Benefits for Technicians:
- System Protection: Precisely calibrated 330C trip point prevents localized boiling and heat exchanger cracking.
- Broad Compatibility: Engineered for a wide range of Lochinvar and A.O. Smith models, including Knight and Armor series.
- Reliable Termination: Designed for high-temperature environments with durable terminals to ensure a consistent electrical path.
- Safety Compliance: Meets original manufacturer specifications for critical over-temperature protection protocols.
Common Questions & Answers:
What causes a 100148402 limit switch to trip?
Most frequent causes include restricted water flow through the heat exchanger, pump failure, or excessive scaling that creates a localized "hot spot," triggering the 330C safety threshold.
How do I verify if the 330C over-temp limit is faulty?
Perform a continuity check across the terminals when the system is cool. If the switch remains open at ambient temperature, the internal bimetallic disc or fuse has likely failed or been permanently tripped.
Is the Lochinvar 100148402 a manual or automatic reset?
This specific over-temp limit is typically a safety device that requires a manual reset or replacement depending on the specific boiler control board configuration to ensure the technician identifies the cause of the overheat condition before restarting.
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.
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Description
The Lochinvar & A.O. Smith 100148402 Temp Limit is a critical safety component designed specifically for high-efficiency commercial and residential boilers. This 330C Over-Temp Limit switch (often referred to as the heat exchanger high limit) acts as a primary fail-safe by monitoring thermal conditions at the heat exchanger. When temperatures exceed the 330Ā°C (626Ā°F) threshold, the 100148402 limit switch breaks the control circuit to initiate an immediate system shutdown, preventing catastrophic equipment damage. As a genuine OEM Lochinvar replacement part, it ensures precise calibration and fits seamlessly into AWN and KBN series units. For technicians performing boiler high limit troubleshooting or routine maintenance, using this factory-spec switch is essential for maintaining the operational integrity of A.O. Smith and Lochinvar heating systems, avoiding the risks associated with non-compliant aftermarket sensors.
Key Benefits for Technicians:
- System Protection: Precisely calibrated 330C trip point prevents localized boiling and heat exchanger cracking.
- Broad Compatibility: Engineered for a wide range of Lochinvar and A.O. Smith models, including Knight and Armor series.
- Reliable Termination: Designed for high-temperature environments with durable terminals to ensure a consistent electrical path.
- Safety Compliance: Meets original manufacturer specifications for critical over-temperature protection protocols.
Common Questions & Answers:
What causes a 100148402 limit switch to trip?
Most frequent causes include restricted water flow through the heat exchanger, pump failure, or excessive scaling that creates a localized "hot spot," triggering the 330C safety threshold.
How do I verify if the 330C over-temp limit is faulty?
Perform a continuity check across the terminals when the system is cool. If the switch remains open at ambient temperature, the internal bimetallic disc or fuse has likely failed or been permanently tripped.
Is the Lochinvar 100148402 a manual or automatic reset?
This specific over-temp limit is typically a safety device that requires a manual reset or replacement depending on the specific boiler control board configuration to ensure the technician identifies the cause of the overheat condition before restarting.
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.
