Lochinvar & A.O. Smith 100161837 Valve

The Lochinvar & A.O. Smith 100161837 Air Metering Valve is a precision-engineered OEM replacement part designed for high-efficiency combustion control in commercial boilers and water heaters. As a 24V, 50/60Hz component, this air metering valve is critical for modulating the air-to-fuel ratio, ensuring complete combustion and maintaining peak thermal efficiency. Built for heavy-duty HVACR environments, this direct-fit valve integrates seamlessly with the control module to prevent air pressure switch errors and flame failures. It is specifically compatible with high-output models such as the Lochinvar Knight FBL1251, FBN1251, and OFN1251. When performing a teardown or routine maintenance, replacing a sticking or unresponsive metering valve is essential to avoid boiler error codes and intermittent shutdowns. Trusting genuine Lochinvar parts ensures that the system maintains its factory-specified emissions profile and operational dependability under high-demand cycles.

• Precise Modulation: Facilitates exact air flow control to match gas input for optimal burner performance and energy savings.
• System Dependability: Reduces the risk of "Air Pressure SW" and "Flame Fail Running" faults by ensuring stable air intake.
• OEM Standards: Engineered to the exact technical specifications required for A.O. Smith and Lochinvar commercial heating equipment.
• Robust Construction: Designed to withstand the thermal stresses of high-capacity boiler rooms and continuous operation.

Which boiler models are compatible with this valve?
This part is the primary air metering valve for Lochinvar FBL1251, FBN1251, and OFN1251 series units, and is used across several A.O. Smith commercial water heating platforms.

What are the symptoms of a failing air metering valve?
Technicians typically observe intermittent ignition failures, sooting at the burner, or blocked drain/air pressure faults when the internal mechanism fails to modulate correctly.

Does this valve require calibration after installation?
While the valve is factory-set, a full combustion analysis is recommended following installation to verify that the air-to-fuel ratio meets the manufacturer’s service manual parameters for the specific site altitude and venting configuration.

This item is not eligible for free shipping.

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.