Common Dishwasher Problems & How to Troubleshoot or Repair

1. Dishwasher Not Turning On

• Check Power: Ensure that the dishwasher is plugged in and the circuit breaker is not tripped. If the dishwasher uses a power switch, verify that it is in the “on” position.
• Door Latch: If the door isn’t properly latched, the dishwasher won’t start. Make sure the door is securely closed.
• Faulty Door Switch or Control Board: If both of the above seem fine, the door switch or control board may be faulty and need replacing.

2. Dishes Not Getting Clean

• Clogged Spray Arms: Check the spray arms for blockages, such as food debris or hard water mineral deposits. Clean out any obstructions and test the arms by spinning them by hand.
• Dirty Filters: Dishwashers have filters that catch food debris. A clogged filter will reduce cleaning performance. Remove the filter (typically found at the bottom) and clean it thoroughly.
• Incorrect Detergent: Ensure you’re using the right type of detergent (powder, gel, or pods) for your machine. Excess detergent or the wrong kind can leave residues.
• Water Temperature: If the water isn’t hot enough, it won’t clean properly. The dishwasher should be supplied with water at least 120°F (49°C). Check the water heater’s temperature setting.

3. Dishwasher Not Draining

• Check Drain Hose: The drain hose may be clogged with food particles or grease. Disconnect the hose from the dishwasher and sink drain, then clear any blockages.
• Clogged Filter: A clogged filter can prevent proper drainage. Clean the filter thoroughly.
• Faulty Drain Pump: If the pump is malfunctioning, it may need to be replaced. This requires some technical expertise, as it involves disassembling parts of the dishwasher.

4. Leaking Water

• Door Seal/Gasket: The most common cause of leaking is a damaged door seal. Check for tears, cracks, or buildup around the door gasket. If it’s damaged, replace it.
• Clogged Drain Pump: A clogged pump may cause water to spill over from the bottom of the dishwasher. Check and clear the pump area.
• Overloading: Overloading the dishwasher or placing dishes incorrectly can sometimes cause water to spill out during the wash cycle.

5. Dishwasher Making Strange Noises

• Blocked Spray Arms: Check that the spray arms are not obstructed by large pots, pans, or utensils. These can cause rattling or grinding noises.
• Loose Parts: If a part is loose or broken (e.g., the spray arm or racks), it may create noise during operation.
• Faulty Motor or Pump: A failing motor or pump can generate buzzing, grinding, or high-pitched noises. These components may need replacing.

6. Foul Odors

• Food Build-up in Filter or Drain: If the dishwasher is not draining properly or food particles are left inside, they can cause a bad odor. Regularly clean the filters and drains.
• Clean with Vinegar: You can run an empty cycle with a cup of vinegar in the bottom rack to eliminate odors.
• Check the Garbage Disposal: If your dishwasher drains into a garbage disposal, ensure it’s clear of debris. A clogged disposal can lead to foul odors in the dishwasher.

7. Dishwasher Not Drying Dishes

• Broken Heating Element: Dishwashers often have a heating element to dry the dishes. If the element is faulty, the drying process will not work. To test the heating element, check its continuity with a multimeter.
• Rinse Aid: If you’re not using rinse aid, or if the dispenser is empty, it can cause poor drying results. Rinse aid helps water evaporate more quickly and prevents spots on dishes.