Beam Circuit Board for Alliance ECS II Central Vacuum (Assy P3) CMPS-QDZ roughly 1 3/8 inch inner

roughly 1 3/8 inch inner diameter fitting

A motor suppressor can fail or degrade over time

The housing encloses the fan assembly and channels the airflow it generates

This genuine OEM Hoover Nozzle Guard Assembly fits the Hoover S3865 and related models

Function: Replacement mopping pad

Beam Circuit Board for Alliance ECS II Central Vacuum (Assy P3) CMPS-QDZ roughly 1 3/8 inch innerThis is a genuine Beam circuit board (Part #100639A), the control board assembly used in the Beam Alliance ECS II central vacuum power unit. It is supplied as assembly P3. This board is the electronic brain of the Alliance ECS II system. It manages the unit's switching and power circuitry, turning the suction motor on and off in response to the low voltage signal from your wall inlet valves. A failed board can leave the unit dead, cause it to run