Weil McLain 383-500-650 Blower Assembly Kit

For service technicians maintaining the Weil-McLain Ultra 399 series, the Weil-McLain 383-500-650 Blower Assembly Kit is the essential OEM solution for restoring high-efficiency combustion performance. This complete boiler combustion blower package is engineered specifically for Ultra 299, 310, and 399 condensing gas boilers, ensuring precise air-fuel mixing and modulation. The assembly utilizes a 115V, 60Hz PSC motor and a durable stamped-steel centrifugal fan to maintain optimal static pressure within the venting system. As a critical component of the premix gas burner system, this replacement blower motor works in tandem with the control module to adjust firing rates based on real-time demand. Integrating this genuine Weil-McLain part ensures the unit meets its original 100 CFM airflow specifications, preserving the system's low-NOx output and quiet operation. Each 383-500-650 kit includes the blower housing, a high-temperature replacement blower gasket, and all necessary mounting hardware for a seamless field swap, minimizing downtime on the job site.

Key Benefits for Technicians:

• Exact OEM Compatibility: Verified fitment for Weil-McLain Ultra boilers (models 299 through 399) to ensure zero-clearance integration with existing gas valves and venturi assemblies.
• Full Installation Kit: Eliminates the need for separate parts sourcing by including the critical blower gasket and hardware required for a proper seal.
• Optimized Performance: Restores factory-spec air delivery to the cast aluminum heat exchanger, preventing common combustion errors like INFO #6 32 lockouts.
• Rugged Construction: Built with galvanized steel housing and a black finish to withstand the demanding environment of a condensing boiler cabinet.

Common Questions:

Does this kit resolve "Blower Failed" (E 32) error codes?
Yes, if the control module confirms a motor failure or RPM signal loss, replacing the assembly with the 383-500-650 usually resolves the lockout, provided the wiring harness and gas pressure are within spec.

Is this blower assembly compatible with Series 1 and Series 2 Ultra boilers?
This specific kit is designed for the high-capacity 299, 310, and 399 models. Technicians should verify the boiler's BTU rating and serial number, as smaller Ultra 80-230 units require different blower part numbers.

What is included in the 383-500-650 kit?
The package includes the pre-assembled blower motor and fan, a new mounting gasket for the air-inlet silencer connection, and the necessary screws for securing the unit to the burner plate.

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.