
Lochinvar & A.O. Smith 100111304 Lower Thermostat
Optimizing electric water heater performance requires precise temperature differential management at the lower heating zone. The Lochinvar & A.O. Smith 100111304 lower thermostat (Model WH9C) is a high-specification OEM replacement engineered for residential and commercial systems. This single-pole regulator features an integrated Energy Cut-Off (ECO) manual reset limit, serving as a critical fail-safe against runaway thermal conditions. When high-limit temperatures are detected, the ECO mechanically interrupts power to the water heater elements, preventing tank over-pressurization and localized scalding.
Designed for a secure surface-mount fit against the tank wall, the 100111304 lower thermostat ensures maximum thermal conductivity for accurate sensing. This WH9C thermostat is compatible with a wide range of Lochinvar, A.O. Smith, State, and American Water Heater models. Field installation is streamlined via standard terminal connections, making it a reliable choice for professional water heater repair and maintenance. Replacing a drifting or fouled thermostat restores factory-spec energy efficiency and prevents unnecessary cycling of the primary heating elements.
Key Benefits for Contractors- OEM Compatibility: Precision-fit for Lochinvar and A.O. Smith WH9C series, ensuring out-of-the-box system synchronization.
- Integrated Safety: Features a built-in High Limit Switch (ECO) to provide redundant protection against overheating.
- Thermal Accuracy: High-sensitivity bimetal sensor maintains consistent set-point temperatures for optimal user comfort.
- Durable Construction: Heavy-duty electrical contacts designed to handle the high amperage of standard electric water heater loads.
- Efficient Regulation: Minimizes standby heat loss by preventing overshoot and maintaining a tighter temperature deadband.
- When should I replace the lower thermostat? If the water is inconsistently warm or the ECO continues to trip despite the upper thermostat functioning, the lower sensing unit likely has a calibration drift.
- Is this compatible with 240V systems? Yes, this thermal regulator is rated for standard residential and commercial voltages used in electric heating element circuits.
- How do I ensure a proper reading? Ensure the mounting bracket holds the thermostat tightly against the tank surface; any air gap will result in delayed response and potential overheating.
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 100111304 Lower Thermostat
Optimizing electric water heater performance requires precise temperature differential management at the lower heating zone. The Lochinvar & A.O. Smith 100111304 lower thermostat (Model WH9C) is a high-specification OEM replacement engineered for residential and commercial systems. This single-pole regulator features an integrated Energy Cut-Off (ECO) manual reset limit, serving as a critical fail-safe against runaway thermal conditions. When high-limit temperatures are detected, the ECO mechanically interrupts power to the water heater elements, preventing tank over-pressurization and localized scalding.
Designed for a secure surface-mount fit against the tank wall, the 100111304 lower thermostat ensures maximum thermal conductivity for accurate sensing. This WH9C thermostat is compatible with a wide range of Lochinvar, A.O. Smith, State, and American Water Heater models. Field installation is streamlined via standard terminal connections, making it a reliable choice for professional water heater repair and maintenance. Replacing a drifting or fouled thermostat restores factory-spec energy efficiency and prevents unnecessary cycling of the primary heating elements.
Key Benefits for Contractors- OEM Compatibility: Precision-fit for Lochinvar and A.O. Smith WH9C series, ensuring out-of-the-box system synchronization.
- Integrated Safety: Features a built-in High Limit Switch (ECO) to provide redundant protection against overheating.
- Thermal Accuracy: High-sensitivity bimetal sensor maintains consistent set-point temperatures for optimal user comfort.
- Durable Construction: Heavy-duty electrical contacts designed to handle the high amperage of standard electric water heater loads.
- Efficient Regulation: Minimizes standby heat loss by preventing overshoot and maintaining a tighter temperature deadband.
- When should I replace the lower thermostat? If the water is inconsistently warm or the ECO continues to trip despite the upper thermostat functioning, the lower sensing unit likely has a calibration drift.
- Is this compatible with 240V systems? Yes, this thermal regulator is rated for standard residential and commercial voltages used in electric heating element circuits.
- How do I ensure a proper reading? Ensure the mounting bracket holds the thermostat tightly against the tank surface; any air gap will result in delayed response and potential overheating.
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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Description
Optimizing electric water heater performance requires precise temperature differential management at the lower heating zone. The Lochinvar & A.O. Smith 100111304 lower thermostat (Model WH9C) is a high-specification OEM replacement engineered for residential and commercial systems. This single-pole regulator features an integrated Energy Cut-Off (ECO) manual reset limit, serving as a critical fail-safe against runaway thermal conditions. When high-limit temperatures are detected, the ECO mechanically interrupts power to the water heater elements, preventing tank over-pressurization and localized scalding.
Designed for a secure surface-mount fit against the tank wall, the 100111304 lower thermostat ensures maximum thermal conductivity for accurate sensing. This WH9C thermostat is compatible with a wide range of Lochinvar, A.O. Smith, State, and American Water Heater models. Field installation is streamlined via standard terminal connections, making it a reliable choice for professional water heater repair and maintenance. Replacing a drifting or fouled thermostat restores factory-spec energy efficiency and prevents unnecessary cycling of the primary heating elements.
Key Benefits for Contractors- OEM Compatibility: Precision-fit for Lochinvar and A.O. Smith WH9C series, ensuring out-of-the-box system synchronization.
- Integrated Safety: Features a built-in High Limit Switch (ECO) to provide redundant protection against overheating.
- Thermal Accuracy: High-sensitivity bimetal sensor maintains consistent set-point temperatures for optimal user comfort.
- Durable Construction: Heavy-duty electrical contacts designed to handle the high amperage of standard electric water heater loads.
- Efficient Regulation: Minimizes standby heat loss by preventing overshoot and maintaining a tighter temperature deadband.
- When should I replace the lower thermostat? If the water is inconsistently warm or the ECO continues to trip despite the upper thermostat functioning, the lower sensing unit likely has a calibration drift.
- Is this compatible with 240V systems? Yes, this thermal regulator is rated for standard residential and commercial voltages used in electric heating element circuits.
- How do I ensure a proper reading? Ensure the mounting bracket holds the thermostat tightly against the tank surface; any air gap will result in delayed response and potential overheating.
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.












