Weil McLain 383-500-040 Assembly

The Weil-McLain 383-500-040 Blower Assembly Kit is a critical OEM replacement engineered specifically for Ultra-230 Gas Boilers. Designed to restore precise combustion airflow, this Weil-McLain inducer fan ensures your hydronic system maintains peak thermal efficiency and stable firing rates. As a high-performance boiler blower replacement, it addresses common fault codes like E28 by providing consistent forced air to the heat exchanger. This complete Ultra boiler blower kit eliminates the need for sourcing individual gaskets or fasteners, consolidating all necessary components for a professional-grade installation. For contractors servicing Weil-McLain Ultra Series units, utilizing this factory-spec 383-500-040 assembly is essential for maintaining the integrity of the combustion cycle and preventing premature system lockouts. This kit is compatible with Ultra-230 Series 3 and Series 4 boilers, offering a drop-in solution that meets the tight tolerances of modern condensing boiler technology.

• Precise Airflow Calibration: Engineered to provide the exact CFM required for Ultra-230 combustion, ensuring optimal fuel-to-air ratios.
• Complete Installation Package: Includes the blower motor, high-temp gasket, Molex adapter, and new hardware to ensure a secure, airtight seal.
• OEM Reliability: Built to the exact specifications of the original Weil-McLain 383-500-040 for seamless integration with existing control boards.
• Reduced Operational Noise: New internal fan geometry minimizes vibration and hunting, solving issues related to loud humming or grinding sounds.

Is this blower compatible with the Ultra-155 boiler?
While this assembly is primary for the Ultra-230, field reports often confirm compatibility with certain Ultra-155 configurations. However, technicians should always verify the part number against the specific boiler serial number to ensure correct static pressure performance.

Does this kit resolve Code E28 on Weil-McLain boilers?
Yes, Code E28 typically indicates a blower failure or communication error. Replacing the faulty unit with this 383-500-040 kit often clears the lockout, provided the control module is functioning correctly.

Does the kit include the Molex connector?
Yes, this blower assembly includes the required Molex adapter to ensure a compatible electrical connection with different series generations of the Ultra 230.

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.