or a complete seized motor resulting in a "No Heat" service call

Is the mounting gasket included with this part

you must use a high-temperature rated actuator to ensure the internal components are protected from thermal stress

allowing media to flow freely

Weil McLain 383-500-407 Burner Replacement Kit Refrigerant or a complete seized motorWhen you are troubleshooting an Ultra Gas Boiler that isn't maintaining a stable flame or is showing signs of combustion instability, the Weil McLain 383 500 407 Burner Replacement Kit is the specified OEM solution for Ultra 299 and Ultra 399 Series 1 and 2 units. This professional grade kit is engineered to restore the precise fuel to air mixture required for high efficiency condensing applications. As a genuine Weil McLain part, it ensures that the