Lochinvar & A.O. Smith 100110217 Contactor

The Lochinvar & A.O. Smith 100110217 Contactor is a critical OEM replacement part designed for heavy-duty power switching in commercial boilers and high-capacity water heaters. This 3-pole contactor is engineered to manage 30A inductive loads (25 FLA) and features a 120V coil, making it the standard specification for precise electrical regulation in high-demand HVAC equipment. As a direct successor to the legacy part 100027716, it ensures seamless compatibility with existing Lochinvar heating systems and A.O. Smith commercial units, preventing the common pitfalls of using universal, under-rated alternatives that lead to premature contact pitting and coil burnout.

For technicians performing a contactor replacement, this rugged component offers high-integrity load protection and reliable switching performance. The high-quality contact surfaces are built to withstand the thermal stress of frequent cycling, significantly reducing the risk of contact welding and system downtime. Utilizing genuine HVAC controls like the 100110217 maintains the original equipment’s efficiency and safety parameters, ensuring your commercial water heater repair meets factory tolerances for long-term operational stability.

Key Benefits for HVACR Technicians:

• Precise 3-Pole Control: Specifically designed to handle 3-phase heating elements and high-amperage motors with a 30-amp resistive capacity.
• Universal OEM Fit: Direct replacement for part numbers 100110217 and 100027716, eliminating mounting and wiring alignment issues in Lochinvar boilers.
• Enhanced Thermal Durability: Engineered to resist electrical arcing and excessive heat, which are primary causes of component failure in commercial heating systems.
• Optimized 120VAC Coil: Provides consistent pull-in voltage and dropout timing to protect downstream electrical components from erratic power delivery.

Common Questions from Contractors:

Is this a direct crossover for the 100027716 part number?
Yes, the 100110217 is the updated manufacturer part number that replaces the older 100027716. It maintains identical electrical specs and physical dimensions for a drop-in replacement.

What are the signs that my current contactor is failing?
Technicians should look for audible buzzing from the 120V coil, visible pitting on the contacts, or a complete failure of the heating elements to energize. Inconsistent voltage across the poles is also a key indicator of internal resistance buildup.

Can I use this 30A contactor to replace a 25A unit?
While moving up in amperage is generally acceptable for safety margin, always verify the Full Load Amps (FLA) of your specific motor or element to ensure this 100110217 matches the factory service requirements for your specific A.O. Smith unit.

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.