Armstrong Fluid Technology 816322-111K Impeller Kit 320788-704 Use the built-in diagnostic interface

Use the built-in diagnostic interface to confirm the specific fault sequence before replacing the board

While some limit controls share similar temperature specs

the valve is not seating properly and requires replacement

ensuring quiet operation and protecting inducer motor bearings

it is functionally equivalent and designed for the same 16-inch burner housing

Armstrong Fluid Technology 816322-111K Impeller Kit 320788-704 Use the built-in diagnostic interfaceThe Armstrong Fluid Technology 816322 111K Impeller Kit is a high precision OEM replacement part designed to restore hydraulic efficiency in centrifugal circulator pumps. This universal kit features a 3. 35 inch (3 3 8") Noryl impeller, specifically engineered for Armstrong Series S and H models, including the S 34, S 35, and H 32. As the advanced successor to legacy parts 816322 111 and 810119 003, this kit provides a complete solution for