have you ever purposely sabotaged an appliance to mess with a co-worker?
back in college when other students turned their backs i would unplug an element wire and plug in a wire from the fuse block to it.. turn on switch,switch go BOOM
my favorite was a fridge in the shop, me and another tech decided to trick a cocky newbie, we disconnected the evaporator and joined the cap tube right to the suction line, bypassing the evaporator, then charged the fridge to run at 0 psi
he spent over a day before he figured out why it wouldn't cool
what made me think of this question was a stove i spent over an hour on today, 10 year old GE sold by our shop... customer complained he could not cook on the surface units properly, shop guy had already checked it and said it was ok, i was sent for a second look
i noticed no minimum heat and medium heats were all about the same, no noticable difference in cycle times or heat from 3 to nine on the switch, but.... you cant have 4 bad switches, then it dawned on me...
someone had taken the green switches for the 8" elements and put them on the 6" and vice versa, all elements matched the switches on the control panel, someone had removed and swapped all 4 of them!!!