Dishwasher Not Washing Properly

Blocked Dishwasher Filter

The most common cause. A clogged filter prevents water from circulating properly and reduces wash performance significantly. Remove and clean the filter at least once a month.

Blocked Spray Arms

The spray arms distribute water around the dishwasher during the cycle. If the holes are blocked with limescale or food debris, water cannot reach all areas of the tub and items will come out dirty.

Low or Empty Salt Reservoir

Dishwasher salt softens the water and prevents limescale build-up. If the salt reservoir is empty, wash performance will deteriorate — particularly in hard water areas.

Low or Empty Rinse Aid

Rinse aid helps water drain off dishes cleanly and prevents spotting. Without it, dishes may come out dirty and streaky even after a full cycle.

Overloaded or Incorrectly Loaded

If items are stacked too closely or placed incorrectly, water cannot reach all surfaces. Larger items should not block the spray arms from rotating freely during the cycle.

Wrong Programme or Temperature

A short or eco programme may not provide enough temperature or cycle time for heavily soiled loads. Use a more intensive programme for pots, pans and heavily soiled items.

Insufficient or Wrong Detergent

Using too little detergent, or a product not suitable for automatic dishwashers, will result in poor cleaning performance. Always use the correct amount of dishwasher-specific detergent.

Clean the Filter

Remove the filter assembly from the bottom of the tub, rinse thoroughly under running water and refit securely. This should be done at least once a month.

Clean the Spray Arms

Remove the spray arms — they usually unclip or unscrew — and rinse under running water. Use a toothpick or thin wire to clear any blocked holes. Refit securely before the next cycle.

Check Salt and Rinse Aid Levels

Top up the salt reservoir and rinse aid dispenser if low or empty. The indicators on the control panel will tell you when these need refilling.

Run a Hot Maintenance Wash

Run an empty cycle on the hottest programme with a dishwasher cleaner tablet or a cup of white vinegar in the bottom of the tub to remove grease and limescale build-up.

Check the Loading

Reload the dishwasher ensuring items are not blocking the spray arms and that water can reach all surfaces. Avoid stacking items so tightly that water cannot circulate freely.