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Everytime after warming up the food in my microwave the fan wont turn off when the timer runs out and I open the door. Tried unplugging , repluging and all other basic troubleshooting but nothing works. Any help would be appreciated

Are you saying fan runs continually if unit is plugged in? Everything is run by the main control board which is non-repairable and these kinds of problems “usually” require replacement of board.