
Lochinvar & A.O. Smith 100187860 Probe
The Lochinvar & A.O. Smith 100187860 Probe is a precision-engineered upper temperature probe designed for high-efficiency commercial water heating systems. Featuring 40-inch leads, this OEM component is critical for monitoring internal tank temperatures to ensure safe and efficient cycling. It is specifically compatible with the Cyclone Xi and Mxi series natural gas water heaters, including BTH, SUF, and HCG 200 models. For field technicians, this direct replacement part addresses common issues where faulty temperature readings lead to short cycling or lockout codes on the control board. This immersion sensor is built to withstand the rigors of commercial demand, providing accurate thermistor feedback to the integrated control system. When diagnosing BTH 300, 400, or 500 models, ensuring the integrity of the temperature sensor leads is paramount for maintaining the thermal efficiency and operational safety of the appliance. Replacing a worn or drifting probe with this genuine Lochinvar water heater part ensures your system remains calibrated to factory specifications.
Key Benefits- OEM Compatibility: Specifically designed for A.O. Smith Cyclone and Lochinvar high-efficiency units, ensuring seamless integration with existing wiring harnesses.
- Extended 40" Leads: Provides ample length for secure routing through cabinet knockouts to the control module without tension on the connections.
- High Accuracy Sensing: Delivers precise resistance-to-temperature data to the water heater control board to prevent overheating and optimize gas consumption.
- Durable Construction: Engineered to handle high-temperature commercial cycles without premature degradation of the probe sheath or lead insulation.
What models are compatible with this probe?
The 100187860 is used primarily in BTH Mxi 300, 400, and 500 models, as well as SUF and HCG series 200 high-efficiency natural gas heaters.
How do I know if my upper temp probe has failed?
Common symptoms include "Sensor Open" or "Sensor Shorted" fault codes on the digital display, or the burner failing to fire when the tank temperature is clearly below the setpoint.
Can this be used as a lower tank probe?
This specific part number is designated as the upper temperature probe. Always verify your service manual's part list, as lead lengths and sensor resistance curves may differ between upper and lower tank positions.
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 100187860 Probe
The Lochinvar & A.O. Smith 100187860 Probe is a precision-engineered upper temperature probe designed for high-efficiency commercial water heating systems. Featuring 40-inch leads, this OEM component is critical for monitoring internal tank temperatures to ensure safe and efficient cycling. It is specifically compatible with the Cyclone Xi and Mxi series natural gas water heaters, including BTH, SUF, and HCG 200 models. For field technicians, this direct replacement part addresses common issues where faulty temperature readings lead to short cycling or lockout codes on the control board. This immersion sensor is built to withstand the rigors of commercial demand, providing accurate thermistor feedback to the integrated control system. When diagnosing BTH 300, 400, or 500 models, ensuring the integrity of the temperature sensor leads is paramount for maintaining the thermal efficiency and operational safety of the appliance. Replacing a worn or drifting probe with this genuine Lochinvar water heater part ensures your system remains calibrated to factory specifications.
Key Benefits- OEM Compatibility: Specifically designed for A.O. Smith Cyclone and Lochinvar high-efficiency units, ensuring seamless integration with existing wiring harnesses.
- Extended 40" Leads: Provides ample length for secure routing through cabinet knockouts to the control module without tension on the connections.
- High Accuracy Sensing: Delivers precise resistance-to-temperature data to the water heater control board to prevent overheating and optimize gas consumption.
- Durable Construction: Engineered to handle high-temperature commercial cycles without premature degradation of the probe sheath or lead insulation.
What models are compatible with this probe?
The 100187860 is used primarily in BTH Mxi 300, 400, and 500 models, as well as SUF and HCG series 200 high-efficiency natural gas heaters.
How do I know if my upper temp probe has failed?
Common symptoms include "Sensor Open" or "Sensor Shorted" fault codes on the digital display, or the burner failing to fire when the tank temperature is clearly below the setpoint.
Can this be used as a lower tank probe?
This specific part number is designated as the upper temperature probe. Always verify your service manual's part list, as lead lengths and sensor resistance curves may differ between upper and lower tank positions.
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 100187860 Probe is a precision-engineered upper temperature probe designed for high-efficiency commercial water heating systems. Featuring 40-inch leads, this OEM component is critical for monitoring internal tank temperatures to ensure safe and efficient cycling. It is specifically compatible with the Cyclone Xi and Mxi series natural gas water heaters, including BTH, SUF, and HCG 200 models. For field technicians, this direct replacement part addresses common issues where faulty temperature readings lead to short cycling or lockout codes on the control board. This immersion sensor is built to withstand the rigors of commercial demand, providing accurate thermistor feedback to the integrated control system. When diagnosing BTH 300, 400, or 500 models, ensuring the integrity of the temperature sensor leads is paramount for maintaining the thermal efficiency and operational safety of the appliance. Replacing a worn or drifting probe with this genuine Lochinvar water heater part ensures your system remains calibrated to factory specifications.
Key Benefits- OEM Compatibility: Specifically designed for A.O. Smith Cyclone and Lochinvar high-efficiency units, ensuring seamless integration with existing wiring harnesses.
- Extended 40" Leads: Provides ample length for secure routing through cabinet knockouts to the control module without tension on the connections.
- High Accuracy Sensing: Delivers precise resistance-to-temperature data to the water heater control board to prevent overheating and optimize gas consumption.
- Durable Construction: Engineered to handle high-temperature commercial cycles without premature degradation of the probe sheath or lead insulation.
What models are compatible with this probe?
The 100187860 is used primarily in BTH Mxi 300, 400, and 500 models, as well as SUF and HCG series 200 high-efficiency natural gas heaters.
How do I know if my upper temp probe has failed?
Common symptoms include "Sensor Open" or "Sensor Shorted" fault codes on the digital display, or the burner failing to fire when the tank temperature is clearly below the setpoint.
Can this be used as a lower tank probe?
This specific part number is designated as the upper temperature probe. Always verify your service manual's part list, as lead lengths and sensor resistance curves may differ between upper and lower tank positions.
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.












