Fuller Brush Main Power Swi...
$11.99
Product details
A main power switch is what closes the circuit every time you press it, running current from the wall cord through to the motor on the Fuller Brush Mighty Maid upright, model FBMM1T. B328-0400 replaces the original unit.
Repeated pressing arcs the internal contacts a little each time, and over months of use that arcing pits the metal until it stops making clean contact. What shows up first is a vacuum that needs to be held or jiggled at the switch to start, one that starts only sometimes, or one that quits the instant the cord gets tugged. Owners often blame the motor or the cord first, since a machine that will not start could be either. Before assuming the worst, wiggle the switch housing itself while the unit is plugged in and watch whether the motor cuts in and out along with it. If it does, the switch itself is the likely fault, not anything further down the line.
A fresh switch brings back a single, reliable press to start. Unplug the machine before opening the housing, and mark which lead lands on which terminal beforehand, since the two are not always interchangeable.
If you have a multimeter on hand, testing the old switch for continuity across its terminals while toggling it confirms the diagnosis before you spend time on the swap. An open circuit in the on position, or one that flickers as you wiggle the housing, points squarely at the switch rather than the motor or cord. The new switch seats in the original cutout without any trimming or reshaping needed, so this stays a wiring job rather than a fitting one. Once it is connected, cycle the machine a handful of times before closing the housing fully, in case a spade terminal needs reseating.
- Part: B328-0400 main power switch
- Fits: FBMM1T Mighty Maid, Fuller Brush
- Symptom: needs jiggling to start, starts intermittently
- Before you start: unplug the machine, mark wire positions
