If water is flowing into your dishwasher but the spray arm refuses to spin, the issue is usually caused by physical interference, clogged spray nozzles, or low water pressure. Check if oversized plates, baking sheets, or pot handles in the racks are physically blocking the arm's path. Inspect the spray nozzle holes for mineral scale blockages that disrupt the jet propulsion needed to make the arm rotate. Additionally, a weak circulation pump, a clogged water inlet valve screen, or a worn center support bearing can prevent proper rotation despite adequate water fill levels.
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