These might be wires that have come loose from their terminals. Inspect for any loose connections, especially near the motor.This is typically done by unscrewing the front grille. First, unplug the fan to prevent electric shock.If your fan stopped working after falling over, a connection may have been jostled loose. 2) Box Fan Fell Over and Stopped Workingīox fans are sensitive to physical impact. Replace the front grill and plug the fan back in to see if the clicking noise has stopped.Make sure to tighten them enough so that they stay in place but are not overly strained. You may have to use a screwdriver to tighten any loose parts.If there aren’t any visible obstructions, check the screws and tightness of the blades and other parts.If you find anything, remove it carefully. Check for any visible obstructions like debris or foreign objects stuck in the blades.In some models, these are located at the back. Remove the front grill by unscrewing the retaining screws.Start by unplugging the fan for safety reasons.This problem is typically due to the loosening of screws or parts, or even because of an obstruction. Please see my full affiliate disclosure) I made this image – Most Common Problems With Box Fans