Lochinvar & A.O. Smith 100110201 Limit Switch

The Lochinvar & A.O. Smith 100110201 Limit Switch is a critical safety component designed for surface-mount applications in commercial and residential water heating systems. Engineered as a Single-Pole Single-Throw (SPST) high-limit control, this ECO control 60TV-15 functions by monitoring internal temperatures and interrupting the burner circuit if conditions exceed safe operational parameters. With a fixed, non-adjustable cutout temperature of 200°F (or up to 255°F depending on specific system high-limit demands), it prevents overheating and potential tank damage. The manual reset feature ensures that a technician must inspect the system for the cause of the trip—such as a clogged flame arrestor or restricted airflow—before the unit is placed back into service. As a genuine OEM water heater part, it ensures precise fitment and restores the original safety specifications required by Lochinvar and A.O. Smith equipment. Professional installation is recommended to ensure proper thermal contact and reliable circuit interruption.

Key Benefits:

• Reliable manual reset limit switch functionality prevents automatic cycling after a safety trip.
• Precision-engineered 100110201 high limit control maintains strict safety thresholds to protect equipment integrity.
• Durable surface-mount design allows for direct thermal sensing on the tank or heat exchanger.
• Compatible with a broad range of Lochinvar and A.O. Smith models requiring the 60TV-15 ECO specification.
• Essential thermal switch replacement for troubleshooting pilot outages and burner lockout issues.

Common Questions:

How do I know if my 100110201 limit switch is tripped?
If your water heater pilot won’t stay lit or the burner won't engage, check the small button in the center of the switch. A physical "click" upon pressing indicates the safety circuit was opened due to an over-temperature event.

What causes this high limit control to open?
Tripping is typically caused by excessive water temperature, restricted airflow to the combustion chamber, or a build-up of lint on the flame arrestor, triggering the safety sensor to protect the unit.

Can I bypass the ECO control for testing?
Bypassing safety controls is never recommended. This component is a primary safety device; if it fails or trips frequently, the underlying heating or venting issue must be diagnosed by a professional.

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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.