Recently I noticed a washing machine manual which says "Wall outlet must not be located behind dryer." A quick Google search reveals this is pretty common, but what's the reason for it?
I understand that the washer needs "regular" 120V AC and not 220V like you sometimes find behind a dryer, but why would a regular outlet box that happens to be behind an adjacent dryer (i.e. not too far away for cord length to be an issue), be unacceptable?