Have a MATAG clothes dryer Mod. #PDET910AYM that have been work on and the belt is slipping and the drum barley rotates and at a counterclockwise rotation... New belt and pulley tensioner have been replace. Does the motor startup switch need replacing.
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You must have installed the belt and the tensioner wrong. Here are some manuals: https://dl.dropboxusercontent.com/u/8010163/Maytag%20Dryers.zip