Lochinvar & A.O. Smith 100108464 Aquastat

The Lochinvar & A.O. Smith 100108464 Aquastat is a high-precision immersion temperature controller designed for reliable cycling in commercial and residential water heating systems. Engineered with a 120-180°F temperature range, this SPST (Single Pole Single Throw) control provides critical high-limit or operating control functionality. As a veteran technician, you know that capillary tube integrity is paramount; this unit features an 80-inch capillary to accommodate diverse mounting configurations and tank depths. This genuine OEM part serves as the direct updated version for 9000913005 and 11B79-2 (White-Rodgers), ensuring seamless HVAC part compatibility without the need for field modifications. The manual reset (M/R) capability acts as a vital safety threshold, preventing automatic restarts in over-temperature conditions. Whether you are performing a boiler repair or a storage tank maintenance, utilizing this OEM water heater part ensures the system remains within its engineered technical specifications for high-efficiency performance.

• Direct OEM Replacement: Safely replaces legacy models 9000913005, 11B79-2, 9004531205, and 100109918.
• Extended Reach: Features a long 80" capillary for flexible installation in various Lochinvar and A.O. Smith boiler and water heater models.
• Safety-First Operation: Integrated manual reset prevents hazardous cycling when temperatures exceed the set 120-180°F range.
• Rugged Reliability: Built for commercial HVACR applications requiring precise SPST switching and durable temperature sensing.

Common Questions

Is the 100108464 compatible with older White-Rodgers controllers?
Yes, this unit is the engineered successor to the 11B79-2. It matches the electrical and thermal characteristics required for A.O. Smith and Lochinvar equipment originally using that part number.

What is the benefit of the manual reset on this aquastat?
The manual reset ensures that if the system hits the high-limit trip point, a technician must physically inspect the equipment before it can fire again. This is a standard safety protocol in industrial water heating to prevent equipment damage after a thermal runaway event.

Can this be used for both heating and cooling?
This is an SPST open-on-rise controller specifically calibrated for hot water temperature control and limit applications. Always verify the wiring diagram and sensing bulb placement during HVAC troubleshooting.

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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.