Common dishwasher problems (and how to fix them)

A dishwasher saves time, effort, and a fair bit of patience - until it stops working properly.

Whether it’s leaving dishes dirty, not draining, or making strange noises, most dishwasher problems have a fairly simple explanation. The good news? Some can be fixed quickly without needing an engineer.

Here’s how to spot what’s going wrong and what you can do about it.

Dishwasher leaking?

If you’ve noticed water pooling around your dishwasher, it’s worth checking a few common causes first.

Too much detergent can create excess foam, which can lead to leaks during a cycle. It’s also worth checking how your dishwasher is loaded overcrowding or poorly stacked dishes can stop the spray arms from working properly and cause water to escape.

Take a look at the door seal as well. Over time, it can wear down or become damaged, which may allow water to leak out. Finally, check the pipes behind the machine to make sure they’re securely connected and in good condition.

Dishwasher not draining?

It’s normal for a small amount of water to sit in the bottom of the machine, but if there’s more than usual, something isn’t quite right.

Start by checking the drain hose for any visible damage or kinks. If that looks fine, the issue could be a blocked drain, which is a common cause of water not clearing properly.

If both of those seem fine, the problem may be with the pump. In that case, you’ll likely need to refer to your manual or call in an engineer.

Dishwasher not filling with water

When your dishwasher finishes a cycle but your dishes still aren’t clean, it’s often down to how it’s loaded.

Plates and utensils can block each other if they’re packed too tightly, preventing water and detergent from reaching everything inside. Adjusting how items are arranged can often solve the issue.

If the machine still isn’t filling, it’s usually a sign that a professional repair is needed.

Dishwasher not cleaning properly

When your dishwasher finishes a cycle but your dishes still aren’t clean, it’s often down to how it’s loaded.

Plates and utensils can block each other if they’re packed too tightly, preventing water and detergent from reaching everything inside. Adjusting how items are arranged can often solve the issue.

If you’ve tried that and the results haven’t improved, it could point to a deeper issue that needs checking.

Dishwasher making unusual noises

Dishwashers aren’t silent, but loud or unusual noises are usually a sign that something isn’t right.

Start by checking inside the machine for any loose items like cutlery or food debris that could be knocking around during a cycle. It’s also worth making sure the appliance is sitting level on the floor.

If you’re hearing a thumping or knocking sound, it could be related to the water inlet valve, which may need replacing.

Staying one step ahead of breakdowns

Dishwasher problems have a habit of appearing at the worst possible time - usually when you’ve got a full load waiting.

Having support in place can make things much easier when something goes wrong, especially when it comes to everyday appliances you rely on.

If you’re noticing repeated issues, it might also be worth reading our guides on washing machine problems or why your fridge isn’t cooling properly, as similar faults can happen across multiple appliances.

Keep your home running smoothly

From washing machines and fridge freezers to ovens, coffee machines and even smart home devices, most homes rely on more appliances than ever before. When one stops working, it can quickly disrupt your day — which is why it’s worth thinking ahead about how you’d handle a breakdown. If you’re dealing with issues now, you might also find our guides on washing machine problems, fridge cooling issues or common dishwasher faults useful.