
Lochinvar & A.O. Smith 100108641 Thermostat
The Lochinvar & A.O. Smith 100108641 Thermostat is a critical OEM replacement part designed for precise thermal management in commercial and residential water heating systems. This WH9HC-6 lower thermostat features an integrated Energy Cut-Off (ECO) safety switch, providing a redundant high-limit safety layer that manually interrupts power to the heating elements if tank temperatures exceed safe operating parameters. The kit includes the protective terminal cover, ensuring compliance with electrical safety standards and protecting sensitive wiring from environmental debris in the mechanical room. Engineered for high-recovery electric water heaters, this surface-mount thermostat maintains tight temperature differentials to optimize energy efficiency and prevent short-cycling. As a genuine Lochinvar part, it ensures direct mechanical compatibility with original brackets and terminal configurations, reducing labor time during field installation. Contractors rely on this heavy-duty thermostat to restore factory-spec performance in A.O. Smith and Lochinvar systems where precise 120V/240V switching and safety-critical high-limit protection are required for code-compliant operation.
Key Benefits:- Integrated ECO Safety: Features a manual reset high-limit switch to lock out the system during over-temperature events.
- Direct OEM Fit: Ensures seamless compatibility with Lochinvar and A.O. Smith commercial-grade and residential electric units.
- Enhanced Terminal Protection: Includes the essential plastic cover to shield electrical connections from moisture and accidental contact.
- Precise Thermal Response: Calibrated for accurate sensing of tank wall temperatures to maintain consistent hot water delivery.
- Durability: Constructed with heavy-duty industrial materials to withstand the high ambient heat of water heater electrical cabinets.
- Is this compatible with upper or lower element configurations? This 100108641 model is specifically designed as a lower thermostat for dual-element water heaters.
- Can I use this for non-A.O. Smith brands? While designed for A.O. Smith and Lochinvar, it is an OEM part; always verify the MPN 100108641 against your unit's technical manual.
- Does the ECO reset automatically? No, the Energy Cut-Off is a manual-reset safety device intended to alert the technician of a potential runaway heating condition.
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 100108641 Thermostat
The Lochinvar & A.O. Smith 100108641 Thermostat is a critical OEM replacement part designed for precise thermal management in commercial and residential water heating systems. This WH9HC-6 lower thermostat features an integrated Energy Cut-Off (ECO) safety switch, providing a redundant high-limit safety layer that manually interrupts power to the heating elements if tank temperatures exceed safe operating parameters. The kit includes the protective terminal cover, ensuring compliance with electrical safety standards and protecting sensitive wiring from environmental debris in the mechanical room. Engineered for high-recovery electric water heaters, this surface-mount thermostat maintains tight temperature differentials to optimize energy efficiency and prevent short-cycling. As a genuine Lochinvar part, it ensures direct mechanical compatibility with original brackets and terminal configurations, reducing labor time during field installation. Contractors rely on this heavy-duty thermostat to restore factory-spec performance in A.O. Smith and Lochinvar systems where precise 120V/240V switching and safety-critical high-limit protection are required for code-compliant operation.
Key Benefits:- Integrated ECO Safety: Features a manual reset high-limit switch to lock out the system during over-temperature events.
- Direct OEM Fit: Ensures seamless compatibility with Lochinvar and A.O. Smith commercial-grade and residential electric units.
- Enhanced Terminal Protection: Includes the essential plastic cover to shield electrical connections from moisture and accidental contact.
- Precise Thermal Response: Calibrated for accurate sensing of tank wall temperatures to maintain consistent hot water delivery.
- Durability: Constructed with heavy-duty industrial materials to withstand the high ambient heat of water heater electrical cabinets.
- Is this compatible with upper or lower element configurations? This 100108641 model is specifically designed as a lower thermostat for dual-element water heaters.
- Can I use this for non-A.O. Smith brands? While designed for A.O. Smith and Lochinvar, it is an OEM part; always verify the MPN 100108641 against your unit's technical manual.
- Does the ECO reset automatically? No, the Energy Cut-Off is a manual-reset safety device intended to alert the technician of a potential runaway heating condition.
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
Shipping & Returns
Shipping & Returns
Description
The Lochinvar & A.O. Smith 100108641 Thermostat is a critical OEM replacement part designed for precise thermal management in commercial and residential water heating systems. This WH9HC-6 lower thermostat features an integrated Energy Cut-Off (ECO) safety switch, providing a redundant high-limit safety layer that manually interrupts power to the heating elements if tank temperatures exceed safe operating parameters. The kit includes the protective terminal cover, ensuring compliance with electrical safety standards and protecting sensitive wiring from environmental debris in the mechanical room. Engineered for high-recovery electric water heaters, this surface-mount thermostat maintains tight temperature differentials to optimize energy efficiency and prevent short-cycling. As a genuine Lochinvar part, it ensures direct mechanical compatibility with original brackets and terminal configurations, reducing labor time during field installation. Contractors rely on this heavy-duty thermostat to restore factory-spec performance in A.O. Smith and Lochinvar systems where precise 120V/240V switching and safety-critical high-limit protection are required for code-compliant operation.
Key Benefits:- Integrated ECO Safety: Features a manual reset high-limit switch to lock out the system during over-temperature events.
- Direct OEM Fit: Ensures seamless compatibility with Lochinvar and A.O. Smith commercial-grade and residential electric units.
- Enhanced Terminal Protection: Includes the essential plastic cover to shield electrical connections from moisture and accidental contact.
- Precise Thermal Response: Calibrated for accurate sensing of tank wall temperatures to maintain consistent hot water delivery.
- Durability: Constructed with heavy-duty industrial materials to withstand the high ambient heat of water heater electrical cabinets.
- Is this compatible with upper or lower element configurations? This 100108641 model is specifically designed as a lower thermostat for dual-element water heaters.
- Can I use this for non-A.O. Smith brands? While designed for A.O. Smith and Lochinvar, it is an OEM part; always verify the MPN 100108641 against your unit's technical manual.
- Does the ECO reset automatically? No, the Energy Cut-Off is a manual-reset safety device intended to alert the technician of a potential runaway heating condition.
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.












