Be sure to disconnect power cord before beginning repairs. The problem was due to fusing together of contact points inside start switch which allowed current to flow continuously instead of cutting off appropriately. Removed screws from back plate of control panel with small socket tipped driver. Start switch has a lock tab on one side. Pry lock tab up carefully and twist the switch counterclockwise to remove from panel slot. Disconnect two leads from old switch using flat tipped screw driver if necessary. Reattach leads to replacement switch. Mount new switch onto panel. Remember old switch had to be twisted off, so position new one with lock tab off set so that when new switch is twisted on, lock tab will end in proper position to fit in slot.