
Lochinvar & A.O. Smith 100233591 Immersion Thermostat
The Lochinvar & A.O. Smith 100233591 Immersion Thermostat is a precision-engineered OEM replacement temperature control designed for high-performance water heaters and commercial boilers. Operating within a critical 80-180°F temperature range (or up to 210°F depending on specific kit configurations), this immersion-style sensing probe utilizes a 1/2-inch NPT stainless steel connection to ensure accurate thermal transmission and rapid response to fluid temperature fluctuations. As a vital HVAC control component, it prevents overheating by regulating the burner circuit, effectively maintaining system setpoints to optimize energy consumption. Whether you are servicing a Lochinvar Knight boiler or an A.O. Smith industrial water heater, this 100233591 tstat provides the reliable mechanical switching required for high-draw applications. Its robust construction resists scaling and corrosion in potable water environments, ensuring long-term setpoint stability without the drift common in lower-grade aftermarket sensors. This part is essential for contractors performing preventative boiler maintenance or emergency repairs where maintaining exact water temperature is non-negotiable for safety and mechanical efficiency.
Key Benefits- Universal Compatibility: Engineered specifically as a direct Lochinvar 100233591 replacement for a wide array of commercial boilers and water heaters.
- High-Accuracy Sensing: Features a 1/2 inch NPT immersion bulb for direct fluid contact, providing real-time data to the control module.
- Thermal Safety: Integrates seamlessly with existing limit controls to prevent dangerous high-temperature scaling and system over-pressurization.
- Durable Construction: Built with industrial-grade materials to withstand the thermal cycling typical in commercial HVACR environments.
What is the primary function of the 100233591 immersion thermostat?
This thermostat acts as a primary or secondary temperature regulator, breaking the electrical circuit to the heating element or gas valve once the water reaches the user-defined setpoint.
Is this part compatible with both Lochinvar and A.O. Smith units?
Yes, the 100233591 is a cross-functional OEM part utilized across several brands under the A.O. Smith parent company, including Lochinvar and State Water Heaters.
Does this unit include a manual reset?
This specific model is typically an operating control; however, contractors should verify if their specific system requires a manual reset high-limit or an automatic cycling thermostat before installation.
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.
Original: $248.78
-65%$248.78
$87.07Lochinvar & A.O. Smith 100233591 Immersion Thermostat
The Lochinvar & A.O. Smith 100233591 Immersion Thermostat is a precision-engineered OEM replacement temperature control designed for high-performance water heaters and commercial boilers. Operating within a critical 80-180°F temperature range (or up to 210°F depending on specific kit configurations), this immersion-style sensing probe utilizes a 1/2-inch NPT stainless steel connection to ensure accurate thermal transmission and rapid response to fluid temperature fluctuations. As a vital HVAC control component, it prevents overheating by regulating the burner circuit, effectively maintaining system setpoints to optimize energy consumption. Whether you are servicing a Lochinvar Knight boiler or an A.O. Smith industrial water heater, this 100233591 tstat provides the reliable mechanical switching required for high-draw applications. Its robust construction resists scaling and corrosion in potable water environments, ensuring long-term setpoint stability without the drift common in lower-grade aftermarket sensors. This part is essential for contractors performing preventative boiler maintenance or emergency repairs where maintaining exact water temperature is non-negotiable for safety and mechanical efficiency.
Key Benefits- Universal Compatibility: Engineered specifically as a direct Lochinvar 100233591 replacement for a wide array of commercial boilers and water heaters.
- High-Accuracy Sensing: Features a 1/2 inch NPT immersion bulb for direct fluid contact, providing real-time data to the control module.
- Thermal Safety: Integrates seamlessly with existing limit controls to prevent dangerous high-temperature scaling and system over-pressurization.
- Durable Construction: Built with industrial-grade materials to withstand the thermal cycling typical in commercial HVACR environments.
What is the primary function of the 100233591 immersion thermostat?
This thermostat acts as a primary or secondary temperature regulator, breaking the electrical circuit to the heating element or gas valve once the water reaches the user-defined setpoint.
Is this part compatible with both Lochinvar and A.O. Smith units?
Yes, the 100233591 is a cross-functional OEM part utilized across several brands under the A.O. Smith parent company, including Lochinvar and State Water Heaters.
Does this unit include a manual reset?
This specific model is typically an operating control; however, contractors should verify if their specific system requires a manual reset high-limit or an automatic cycling thermostat before installation.
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 100233591 Immersion Thermostat is a precision-engineered OEM replacement temperature control designed for high-performance water heaters and commercial boilers. Operating within a critical 80-180°F temperature range (or up to 210°F depending on specific kit configurations), this immersion-style sensing probe utilizes a 1/2-inch NPT stainless steel connection to ensure accurate thermal transmission and rapid response to fluid temperature fluctuations. As a vital HVAC control component, it prevents overheating by regulating the burner circuit, effectively maintaining system setpoints to optimize energy consumption. Whether you are servicing a Lochinvar Knight boiler or an A.O. Smith industrial water heater, this 100233591 tstat provides the reliable mechanical switching required for high-draw applications. Its robust construction resists scaling and corrosion in potable water environments, ensuring long-term setpoint stability without the drift common in lower-grade aftermarket sensors. This part is essential for contractors performing preventative boiler maintenance or emergency repairs where maintaining exact water temperature is non-negotiable for safety and mechanical efficiency.
Key Benefits- Universal Compatibility: Engineered specifically as a direct Lochinvar 100233591 replacement for a wide array of commercial boilers and water heaters.
- High-Accuracy Sensing: Features a 1/2 inch NPT immersion bulb for direct fluid contact, providing real-time data to the control module.
- Thermal Safety: Integrates seamlessly with existing limit controls to prevent dangerous high-temperature scaling and system over-pressurization.
- Durable Construction: Built with industrial-grade materials to withstand the thermal cycling typical in commercial HVACR environments.
What is the primary function of the 100233591 immersion thermostat?
This thermostat acts as a primary or secondary temperature regulator, breaking the electrical circuit to the heating element or gas valve once the water reaches the user-defined setpoint.
Is this part compatible with both Lochinvar and A.O. Smith units?
Yes, the 100233591 is a cross-functional OEM part utilized across several brands under the A.O. Smith parent company, including Lochinvar and State Water Heaters.
Does this unit include a manual reset?
This specific model is typically an operating control; however, contractors should verify if their specific system requires a manual reset high-limit or an automatic cycling thermostat before installation.
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.












