Lochinvar & A.O. Smith 100208546 Thermostat

The Lochinvar & A.O. Smith 100208546 Thermostat is a critical direct-immersion T-stat for indirect tanks, engineered to provide precise temperature regulation in high-demand potable water systems. Designed as an authentic OEM replacement part, this aquastat control manages the heating cycle by signaling the boiler to circulate hot water through the internal heat exchanger once the domestic hot water temperature falls below the setpoint. It features robust electro-mechanical sensing technology to ensure long-term reliability in varying water conditions. Whether you are servicing a Lochinvar Knight series or an A.O. Smith indirect-fired water heater, this control maintains a narrow differential to prevent short-cycling and thermal stacking. Technicians prefer this specific indirect water heater thermostat for its consistent resistance to scale buildup and its ability to maintain accurate DHW temperature control. Integrating this component ensures the storage tank operates within peak efficiency parameters while preventing excessive standby heat loss.

• Broad Compatibility: Engineered for seamless integration with a wide variety of Lochinvar residential and commercial indirect tanks.
• High Precision: Maintains accurate temperature setpoints to ensure consistent hot water delivery and user safety.
• Industrial Build Quality: Built with high-grade components to withstand the high-temperature environments of mechanical rooms.
• Ease of Installation: Standard immersion well mounting allows for rapid field replacement, reducing labor hours on-site.

Is the 100208546 compatible with both Lochinvar and A.O. Smith brands?
Yes, this is a shared OEM part number utilized across several AO Smith and Lochinvar product lines, specifically for their indirect-fired water heater series.

Does this thermostat include the immersion well?
This part number typically refers to the thermostat control assembly; if your existing well is corroded or leaking, it should be verified and replaced separately to ensure proper heat transfer.

Can this be used for space heating applications?
No, this specific control is calibrated for the temperature ranges required for domestic hot water (DHW) storage and is not intended for primary hydronic loop control.

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.