How Do You Align The Blades Of A Box Fan?
Your box fan is just a set of fan blades attached directly to the shaft of a small motor. These types of fans are great for exhausting hot or stale air from a room. They run by either a shaded pole or a split-phase motor controlled by a multi-speed switch. If your box fan has excessive noise, chances are you need to re-align the blades. Here is how you can align the blades of your box fan. Unplug your fan. Always unplug your box fan before you begin work on it. Remove the screws holding the front grill with a screwdriver. Place your fan on a flat surface, grasp the blades from below the blades and lift them up slowly and firmly. Pull off your switch knob. The switch body on your fan is held with tabs, so you will compress the tabs with pliers and push the shaft through the housing. Align your blades by placing the blade on a flat surface. Every blade should touch the surface. Measure the height of each blade. If your heights vary by more than one-quarter inch, bend the blades to align
