Response to Malinda,  The Hayward Aquabug MODEL#500 could have several issues that cause it not to move by itself. I would begin with checking the filter to see if it is dirty and not allowing enough suction. I would then take the unit out of the water and check the moving parts such as the "A-Frame" and "turbine" to ensure that it is working properly. Then I would check your hoses to make sure you don't have any leaks.

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