I’m sorry to hear about your windshield wipers—we don’t miss them until we need them!
Since you can hear the motor running, that means it is still getting power. The problem is coming from either the linkage or the gears inside the motor. The plastic gears can break under stress, such as the strain from frozen wipers. Strain can also break or disconnect the linkage. If these components are damaged, they need to be replaced.
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