If a dishwasher is running but no longer cleaning dishes effectively, there could be several possible causes. Here are some common issues that may lead to a decrease in cleaning performance and potential solutions:
Clogged spray arms: The spray arms inside the dishwasher can become clogged with debris or mineral deposits over time, preventing them from spraying water properly. Inspect the spray arms and clean out any blockages. You can remove the spray arms and rinse them under running water to clear any obstructions.
Blocked or dirty filters: Dishwashers have filters that prevent food particles from recirculating during the wash cycle. If these filters are clogged or dirty, they can restrict water flow and impact cleaning performance. Remove and clean the filters according to the manufacturer's instructions. This is typically done by rinsing them under running water.
Malfunctioning or worn-out spray arm bearings: The spray arms rotate with the help of bearings or washers. If these components are damaged or worn out, the spray arms may not spin correctly, resulting in inadequate cleaning. Inspect the spray arm bearings and replace them if necessary.
Water inlet issues: Insufficient water supply or low water pressure can affect the dishwasher's ability to clean effectively. Ensure that the water inlet valve is fully open and that the water supply is adequate. If there are any issues with water pressure, you may need to consult a plumber to address the problem.
Improper loading or overcrowding: Incorrect loading of dishes can hinder water circulation and prevent proper cleaning. Make sure you're following the dishwasher's loading instructions, arranging the dishes properly, and avoiding overcrowding. Allow space between items for the water and detergent to reach all surfaces.
Detergent issues: Using expired or incorrect detergent, or using too little detergent, can impact cleaning performance. Ensure you're using a high-quality dishwasher detergent specifically formulated for your dishwasher. Check the detergent packaging for dosage instructions and adjust accordingly.
Hard water deposits: If your water has a high mineral content, it can leave deposits on dishes and affect cleaning performance over time. Consider using a dishwasher cleaner or descaler periodically to remove mineral buildup from the dishwasher's interior and spray arms.
Malfunctioning components: If none of the above solutions improve the cleaning performance, there could be an issue with the dishwasher's components, such as the pump, motor, or wash arms. In such cases, it's recommended to contact a professional appliance repair technician to diagnose and fix the problem.
Remember to consult your dishwasher's user manual for specific troubleshooting steps and maintenance recommendations.