Lochinvar & A.O. Smith 100208570 Limit
As a veteran tech, you know that a nuisance trip is one thing, but a failed high limit is a direct threat to the heat exchanger. The Lochinvar & A.O. Smith 100208570 Limit is a critical safety component calibrated for a 175F high limit set point. This genuine OEM part, which is identical to TST2052, provides the precision needed to prevent runaway temperatures in residential pool heaters and water heaters. Designed with a 1/4 NPT connection, this 175 degree high limit switch is compatible with Lochinvar ER152, EN152, and EL152 series, as well as several A.O. Smith water heater configurations. When the aquastat or primary control fails, this 100208570 limit switch acts as the final line of defense. Don't waste time on generic sensors that drift; swap in this high-limit for a reliable over-temperature protection fix that keeps the equipment within safe operating parameters and prevents costly combustion chamber fatigue.
Key Benefits:- OEM Compatibility: Exact replacement for TST2052, 100170593, and TST2052K, ensuring the logic board recognizes the resistance values.
- Precision Calibration: Reliable 175F thermal switch response to protect non-ASME equipment from thermal stress.
- Durable Construction: Built for high-cycle environments in both pool heater high limit and domestic hot water applications.
- Standard Fitting: Features a 1/4" NPT thread for a leak-free seal and straightforward installation in the sensing well.
- How do I know if the 100208570 has tripped? If your status light is flashing a limit error or the pilot won't stay lit, check for continuity across the terminals while the system is cool; no continuity indicates a failed or tripped open circuit.
- Can I use this in place of a different temperature-rated limit? No. High limits are safety-critical; always match the 175 degree rating to the manufacturer's spec to avoid fire hazards or premature cycling.
- Is this compatible with State or Reliance heaters? Yes, since A.O. Smith manufactures those brands, this 100208570 is a standard replacement for many of their residential platforms.
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: $95.41
-65%$95.41
$33.39Lochinvar & A.O. Smith 100208570 Limit
As a veteran tech, you know that a nuisance trip is one thing, but a failed high limit is a direct threat to the heat exchanger. The Lochinvar & A.O. Smith 100208570 Limit is a critical safety component calibrated for a 175F high limit set point. This genuine OEM part, which is identical to TST2052, provides the precision needed to prevent runaway temperatures in residential pool heaters and water heaters. Designed with a 1/4 NPT connection, this 175 degree high limit switch is compatible with Lochinvar ER152, EN152, and EL152 series, as well as several A.O. Smith water heater configurations. When the aquastat or primary control fails, this 100208570 limit switch acts as the final line of defense. Don't waste time on generic sensors that drift; swap in this high-limit for a reliable over-temperature protection fix that keeps the equipment within safe operating parameters and prevents costly combustion chamber fatigue.
Key Benefits:- OEM Compatibility: Exact replacement for TST2052, 100170593, and TST2052K, ensuring the logic board recognizes the resistance values.
- Precision Calibration: Reliable 175F thermal switch response to protect non-ASME equipment from thermal stress.
- Durable Construction: Built for high-cycle environments in both pool heater high limit and domestic hot water applications.
- Standard Fitting: Features a 1/4" NPT thread for a leak-free seal and straightforward installation in the sensing well.
- How do I know if the 100208570 has tripped? If your status light is flashing a limit error or the pilot won't stay lit, check for continuity across the terminals while the system is cool; no continuity indicates a failed or tripped open circuit.
- Can I use this in place of a different temperature-rated limit? No. High limits are safety-critical; always match the 175 degree rating to the manufacturer's spec to avoid fire hazards or premature cycling.
- Is this compatible with State or Reliance heaters? Yes, since A.O. Smith manufactures those brands, this 100208570 is a standard replacement for many of their residential platforms.
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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Product Information
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Description
As a veteran tech, you know that a nuisance trip is one thing, but a failed high limit is a direct threat to the heat exchanger. The Lochinvar & A.O. Smith 100208570 Limit is a critical safety component calibrated for a 175F high limit set point. This genuine OEM part, which is identical to TST2052, provides the precision needed to prevent runaway temperatures in residential pool heaters and water heaters. Designed with a 1/4 NPT connection, this 175 degree high limit switch is compatible with Lochinvar ER152, EN152, and EL152 series, as well as several A.O. Smith water heater configurations. When the aquastat or primary control fails, this 100208570 limit switch acts as the final line of defense. Don't waste time on generic sensors that drift; swap in this high-limit for a reliable over-temperature protection fix that keeps the equipment within safe operating parameters and prevents costly combustion chamber fatigue.
Key Benefits:- OEM Compatibility: Exact replacement for TST2052, 100170593, and TST2052K, ensuring the logic board recognizes the resistance values.
- Precision Calibration: Reliable 175F thermal switch response to protect non-ASME equipment from thermal stress.
- Durable Construction: Built for high-cycle environments in both pool heater high limit and domestic hot water applications.
- Standard Fitting: Features a 1/4" NPT thread for a leak-free seal and straightforward installation in the sensing well.
- How do I know if the 100208570 has tripped? If your status light is flashing a limit error or the pilot won't stay lit, check for continuity across the terminals while the system is cool; no continuity indicates a failed or tripped open circuit.
- Can I use this in place of a different temperature-rated limit? No. High limits are safety-critical; always match the 175 degree rating to the manufacturer's spec to avoid fire hazards or premature cycling.
- Is this compatible with State or Reliance heaters? Yes, since A.O. Smith manufactures those brands, this 100208570 is a standard replacement for many of their residential platforms.
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.
